<!-- ###########################################################################
# Generated by Id: entity_map,v 1.13.20.1 2012/11/07 11:12:02 pmh Exp $
#
# display.ent: List of entities defined as HTML expansions
# $Id$
############################################################################ -->

<!-- !!! DO NOT EDIT THIS FILE DIRECTLY !!! -->

<!ENTITY AElig "&#x00C6;">	<!-- LATIN CAPITAL LETTER AE -->
<!ENTITY Aacgr "&#x0386;">	<!-- GREEK CAPITAL LETTER ALPHA WITH TONOS -->
<!ENTITY Aacute "&#x00C1;">	<!-- LATIN CAPITAL LETTER A WITH ACUTE -->
<!ENTITY Abreve "&#x0102;">	<!-- LATIN CAPITAL LETTER A WITH BREVE -->
<!ENTITY Acedil "A&#x0327;">	<!-- A cedilla -->
<!ENTITY Acheck "&#x01CD;">	<!-- check A -->
<!ENTITY Acirc "&#x00C2;">	<!-- LATIN CAPITAL LETTER A WITH CIRCUMFLEX -->
<!ENTITY Acy "&#x0410;">	<!-- CYRILLIC CAPITAL LETTER A -->
<!ENTITY Agr "&#x0391;">	<!-- GREEK CAPITAL LETTER ALPHA -->
<!ENTITY Agrave "&#x00C0;">	<!-- LATIN CAPITAL LETTER A WITH GRAVE -->
<!ENTITY Amacr "&#x0100;">	<!-- LATIN CAPITAL LETTER A WITH MACRON -->
<!ENTITY Angstrom "&#x00C5;">	<!-- Angstrom sign -->
<!ENTITY Aogon "&#x0104;">	<!-- LATIN CAPITAL LETTER A WITH OGONEK -->
<!ENTITY Aring "&#x00C5;">	<!-- LATIN CAPITAL LETTER A WITH RING ABOVE -->
<!ENTITY Atilde "&#x00C3;">	<!-- LATIN CAPITAL LETTER A WITH TILDE -->
<!ENTITY Auml "&#x00C4;">	<!-- LATIN CAPITAL LETTER A WITH DIAERESIS -->
<!ENTITY Barwed "&#x2306;">	<!-- logical and, dbl bar above -->
<!ENTITY BbbA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbA.gif&#34; ALT=&#34;Bbb A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold A -->
<!ENTITY BbbB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbB.gif&#34; ALT=&#34;Bbb B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold B -->
<!ENTITY BbbC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbC.gif&#34; ALT=&#34;Bbb C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold C -->
<!ENTITY BbbD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbD.gif&#34; ALT=&#34;Bbb D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold D -->
<!ENTITY BbbE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbE.gif&#34; ALT=&#34;Bbb E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold E -->
<!ENTITY BbbF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbF.gif&#34; ALT=&#34;Bbb F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold F -->
<!ENTITY BbbG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbG.gif&#34; ALT=&#34;Bbb G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold G -->
<!ENTITY BbbH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbH.gif&#34; ALT=&#34;Bbb H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold H -->
<!ENTITY BbbI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbI.gif&#34; ALT=&#34;Bbb I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold I -->
<!ENTITY BbbJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbJ.gif&#34; ALT=&#34;Bbb J&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Blackboard bold J -->
<!ENTITY BbbK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbK.gif&#34; ALT=&#34;Bbb K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold K -->
<!ENTITY BbbL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbL.gif&#34; ALT=&#34;Bbb L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold L -->
<!ENTITY BbbM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbM.gif&#34; ALT=&#34;Bbb M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold M -->
<!ENTITY BbbN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbN.gif&#34; ALT=&#34;Bbb N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold N -->
<!ENTITY BbbO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbO.gif&#34; ALT=&#34;Bbb O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold O -->
<!ENTITY BbbP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbP.gif&#34; ALT=&#34;Bbb P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold P -->
<!ENTITY BbbQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbQ.gif&#34; ALT=&#34;Bbb Q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Blackboard bold Q -->
<!ENTITY BbbR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbR.gif&#34; ALT=&#34;Bbb R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold R -->
<!ENTITY BbbS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbS.gif&#34; ALT=&#34;Bbb S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold S -->
<!ENTITY BbbT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbT.gif&#34; ALT=&#34;Bbb T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold T -->
<!ENTITY BbbU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbU.gif&#34; ALT=&#34;Bbb U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold U -->
<!ENTITY BbbV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbV.gif&#34; ALT=&#34;Bbb V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold V -->
<!ENTITY BbbW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbW.gif&#34; ALT=&#34;Bbb W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold W -->
<!ENTITY BbbX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbX.gif&#34; ALT=&#34;Bbb X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold X -->
<!ENTITY BbbY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbY.gif&#34; ALT=&#34;Bbb Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold Y -->
<!ENTITY BbbZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/BbbZ.gif&#34; ALT=&#34;Bbb Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold Z -->
<!ENTITY Bbbk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Bbbk.gif&#34; ALT=&#34;Bbbk&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Blackboard bold k -->
<!ENTITY Bbreve "B&#x0306;">	<!-- breve B -->
<!ENTITY Bcedil "B&#x0327;">	<!-- B cedilla -->
<!ENTITY Bcheck "B&#x030C;">	<!-- check B -->
<!ENTITY Bcy "&#x0411;">	<!-- CYRILLIC CAPITAL LETTER BE -->
<!ENTITY Bgr "&#x0392;">	<!-- GREEK CAPITAL LETTER BETA -->
<!ENTITY Bumpeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Bumpeq.gif&#34; ALT=&#34;Bumpeq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equals with bump above + below -->
<!ENTITY CHcy "&#x0427;">	<!-- CYRILLIC CAPITAL LETTER CHE -->
<!ENTITY Cacute "&#x0106;">	<!-- LATIN CAPITAL LETTER C WITH ACUTE -->
<!ENTITY Cap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Cap.gif&#34; ALT=&#34;Cap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- double intersection -->
<!ENTITY Cbreve "C&#x0306;">	<!-- breve C -->
<!ENTITY Ccaron "&#x010C;">	<!-- LATIN CAPITAL LETTER C WITH CARON -->
<!ENTITY Ccedil "&#x00C7;">	<!-- LATIN CAPITAL LETTER C WITH CEDILLA -->
<!ENTITY Ccheck "&#x010C;">	<!-- check C -->
<!ENTITY Ccirc "&#x0108;">	<!-- LATIN CAPITAL LETTER C WITH CIRCUMFLEX -->
<!ENTITY Cdot "&#x010A;">	<!-- LATIN CAPITAL LETTER C WITH DOT ABOVE -->
<!ENTITY Chi "&#x03A7;">
<!ENTITY Cup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Cup.gif&#34; ALT=&#34;Cup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- double union -->
<!ENTITY DJcy "&#x0402;">	<!-- CYRILLIC CAPITAL LETTER DJE -->
<!ENTITY DScy "&#x0405;">	<!-- CYRILLIC CAPITAL LETTER DZE -->
<!ENTITY DZcy "&#x040F;">	<!-- CYRILLIC CAPITAL LETTER DZHE -->
<!ENTITY Dagger "&#x2021;">	<!-- double dagger -->
<!ENTITY Dbreve "D&#x0306;">	<!-- breve D -->
<!ENTITY Dcaron "&#x010E;">	<!-- LATIN CAPITAL LETTER D WITH CARON -->
<!ENTITY Dcedil "&#x1E10;">	<!-- D cedilla -->
<!ENTITY Dcheck "&#x010E;">	<!-- check D -->
<!ENTITY Dcy "&#x0414;">	<!-- CYRILLIC CAPITAL LETTER DE -->
<!ENTITY Delta "&#x0394;">	<!-- capital Delta, Greek -->
<!ENTITY Dgr "&#x0394;">	<!-- GREEK CAPITAL LETTER DELTA -->
<!ENTITY Dot "&#x0308;">	<!-- dieresis or umlaut mark. MathML has x00A8 -->
<!ENTITY DotDot "&#x20DC;">	<!-- four dots above -->
<!ENTITY Doteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Doteq.gif&#34; ALT=&#34;Doteq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equal with dot above and below -->
<!ENTITY Downarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Downarrow.gif&#34; ALT=&#34;Downarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- down double arrow -->
<!ENTITY Dstrok "&#x0110;">	<!-- LATIN CAPITAL LETTER D WITH STROKE -->
<!ENTITY EEacgr "&#x0389;">	<!-- GREEK CAPITAL LETTER ETA WITH TONOS -->
<!ENTITY EEgr "&#x0397;">	<!-- GREEK CAPITAL LETTER ETA -->
<!ENTITY ENG "&#x014A;">	<!-- LATIN CAPITAL LETTER ENG -->
<!ENTITY ETH "&#x00D0;">	<!-- LATIN CAPITAL LETTER ETH -->
<!ENTITY Eacgr "&#x0388;">	<!-- GREEK CAPITAL LETTER EPSILON WITH TONOS -->
<!ENTITY Eacute "&#x00C9;">	<!-- LATIN CAPITAL LETTER E WITH ACUTE -->
<!ENTITY Ebreve "&#x0114;">	<!-- breve E -->
<!ENTITY Ecaron "&#x011A;">	<!-- LATIN CAPITAL LETTER E WITH CARON -->
<!ENTITY Ecedil "&#x0228;">	<!-- E cedilla -->
<!ENTITY Echeck "&#x011A;">	<!-- check E -->
<!ENTITY Ecirc "&#x00CA;">	<!-- LATIN CAPITAL LETTER E WITH CIRCUMFLEX -->
<!ENTITY Ecy "&#x042D;">	<!-- CYRILLIC CAPITAL LETTER E -->
<!ENTITY Edot "&#x0116;">	<!-- LATIN CAPITAL LETTER E WITH DOT ABOVE -->
<!ENTITY Egr "&#x0395;">	<!-- GREEK CAPITAL LETTER EPSILON -->
<!ENTITY Egrave "&#x00C8;">	<!-- LATIN CAPITAL LETTER E WITH GRAVE -->
<!ENTITY Emacr "&#x0112;">	<!-- LATIN CAPITAL LETTER E WITH MACRON -->
<!ENTITY Eogon "&#x0118;">	<!-- LATIN CAPITAL LETTER E WITH OGONEK -->
<!ENTITY Euml "&#x00CB;">	<!-- LATIN CAPITAL LETTER E WITH DIAERESIS -->
<!ENTITY Fbreve "F&#x0306;">	<!-- breve F -->
<!ENTITY Fcedil "F&#x0327;">	<!-- F cedilla -->
<!ENTITY Fcheck "F&#x030C;">	<!-- check F -->
<!ENTITY Fcy "&#x0424;">	<!-- CYRILLIC CAPITAL LETTER EF -->
<!ENTITY Finv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Finv.gif&#34; ALT=&#34;Finv&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- turned F -->
<!ENTITY GJcy "&#x0403;">	<!-- CYRILLIC CAPITAL LETTER GJE -->
<!ENTITY Game "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Game.gif&#34; ALT=&#34;Game&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- turned G -->
<!ENTITY Gamma "&#x0393;">	<!-- capital Gamma, Greek -->
<!ENTITY Gbreve "&#x011E;">	<!-- LATIN CAPITAL LETTER G WITH BREVE -->
<!ENTITY Gcedil "&#x0122;">	<!-- LATIN CAPITAL LETTER G WITH CEDILLA -->
<!ENTITY Gcheck "&#x01E6;">	<!-- check G -->
<!ENTITY Gcirc "&#x011C;">	<!-- LATIN CAPITAL LETTER G WITH CIRCUMFLEX -->
<!ENTITY Gcy "&#x0413;">	<!-- CYRILLIC CAPITAL LETTER GHE -->
<!ENTITY Gdot "&#x0120;">	<!-- LATIN CAPITAL LETTER G WITH DOT ABOVE -->
<!ENTITY Gg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Gg.gif&#34; ALT=&#34;Gg&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- triple gtr-than -->
<!ENTITY Ggr "&#x0393;">	<!-- GREEK CAPITAL LETTER GAMMA -->
<!ENTITY Gt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Gt.gif&#34; ALT=&#34;Gt&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dbl greater-than sign -->
<!ENTITY HARDcy "&#x042A;">	<!-- CYRILLIC CAPITAL LETTER HARD SIGN -->
<!ENTITY Hbreve "H&#x0306;">	<!-- breve H -->
<!ENTITY Hcedil "&#x1E28;">	<!-- H cedilla -->
<!ENTITY Hcheck "&#x021E;">	<!-- check H -->
<!ENTITY Hcirc "&#x0124;">	<!-- LATIN CAPITAL LETTER H WITH CIRCUMFLEX -->
<!ENTITY Hstrok "&#x0126;">	<!-- LATIN CAPITAL LETTER H WITH STROKE -->
<!ENTITY IEcy "&#x0415;">	<!-- CYRILLIC CAPITAL LETTER IE -->
<!ENTITY IJlig "&#x0132;">	<!-- LATIN CAPITAL LIGATURE IJ -->
<!ENTITY IOcy "&#x0401;">	<!-- CYRILLIC CAPITAL LETTER IO -->
<!ENTITY Iacgr "&#x038A;">	<!-- GREEK CAPITAL LETTER IOTA WITH TONOS -->
<!ENTITY Iacute "&#x00CD;">	<!-- LATIN CAPITAL LETTER I WITH ACUTE -->
<!ENTITY Ibreve "&#x012C;">	<!-- breve I -->
<!ENTITY Icedil "I&#x0327;">	<!-- I cedilla -->
<!ENTITY Icheck "&#x01CF;">	<!-- check I -->
<!ENTITY Icirc "&#x00CE;">	<!-- LATIN CAPITAL LETTER I WITH CIRCUMFLEX -->
<!ENTITY Icy "&#x0418;">	<!-- CYRILLIC CAPITAL LETTER I -->
<!ENTITY Idigr "&#x03AA;">	<!-- GREEK CAPITAL LETTER IOTA WITH DIALYTIKA -->
<!ENTITY Idot "&#x0130;">	<!-- LATIN CAPITAL LETTER I WITH DOT ABOVE -->
<!ENTITY Igr "&#x0399;">	<!-- GREEK CAPITAL LETTER IOTA -->
<!ENTITY Igrave "&#x00CC;">	<!-- LATIN CAPITAL LETTER I WITH GRAVE -->
<!ENTITY Im "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Im.gif&#34; ALT=&#34;Im&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Imaginary -->
<!ENTITY Imacr "&#x012A;">	<!-- LATIN CAPITAL LETTER I WITH MACRON -->
<!ENTITY Iogon "&#x012E;">	<!-- LATIN CAPITAL LETTER I WITH OGONEK -->
<!ENTITY Itilde "&#x0128;">	<!-- LATIN CAPITAL LETTER I WITH TILDE -->
<!ENTITY Iukcy "&#x0406;">	<!-- CYRILLIC CAPITAL LETTER BYELORUSSIAN-UKRAINIAN I -->
<!ENTITY Iuml "&#x00CF;">	<!-- LATIN CAPITAL LETTER I WITH DIAERESIS -->
<!ENTITY Jbreve "J&#x0306;">	<!-- breve J -->
<!ENTITY Jcedil "J&#x0327;">	<!-- J cedilla -->
<!ENTITY Jcheck "J&#x030C;">	<!-- check J -->
<!ENTITY Jcirc "&#x0134;">	<!-- LATIN CAPITAL LETTER J WITH CIRCUMFLEX -->
<!ENTITY Jcy "&#x0419;">	<!-- CYRILLIC CAPITAL LETTER SHORT I -->
<!ENTITY Jsercy "&#x0408;">	<!-- CYRILLIC CAPITAL LETTER JE -->
<!ENTITY Jukcy "&#x0404;">	<!-- CYRILLIC CAPITAL LETTER UKRAINIAN IE -->
<!ENTITY KHcy "&#x0425;">	<!-- CYRILLIC CAPITAL LETTER HA -->
<!ENTITY KHgr "&#x03A7;">	<!-- GREEK CAPITAL LETTER CHI -->
<!ENTITY KJcy "&#x040C;">	<!-- CYRILLIC CAPITAL LETTER KJE -->
<!ENTITY Kbreve "K&#x0306;">	<!-- breve K -->
<!ENTITY Kcedil "&#x0136;">	<!-- LATIN CAPITAL LETTER K WITH CEDILLA -->
<!ENTITY Kcheck "&#x01E8;">	<!-- check K -->
<!ENTITY Kcy "&#x041A;">	<!-- CYRILLIC CAPITAL LETTER KA -->
<!ENTITY Kgr "&#x039A;">	<!-- GREEK CAPITAL LETTER KAPPA -->
<!ENTITY LJcy "&#x0409;">	<!-- CYRILLIC CAPITAL LETTER LJE -->
<!ENTITY Lacute "&#x0139;">	<!-- LATIN CAPITAL LETTER L WITH ACUTE -->
<!ENTITY Lambda "&#x039B;">	<!-- capital Lambda, Greek -->
<!ENTITY Larr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Larr.gif&#34; ALT=&#34;Larr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- twoheadleftarrow -->
<!ENTITY Lbreve "L&#x0306;">	<!-- breve L -->
<!ENTITY Lcaron "&#x013D;">	<!-- LATIN CAPITAL LETTER L WITH CARON -->
<!ENTITY Lcedil "&#x013B;">	<!-- LATIN CAPITAL LETTER L WITH CEDILLA -->
<!ENTITY Lcheck "&#x013D;">	<!-- check L -->
<!ENTITY Lcy "&#x041B;">	<!-- CYRILLIC CAPITAL LETTER EL -->
<!ENTITY Leftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Leftarrow.gif&#34; ALT=&#34;Leftarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left double arrow -->
<!ENTITY Leftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Leftrightarrow.gif&#34; ALT=&#34;Leftrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left-right double arrow -->
<!ENTITY Lgr "&#x039B;">	<!-- GREEK CAPITAL LETTER LAMDA -->
<!ENTITY Ll "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Ll.gif&#34; ALT=&#34;Ll&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- triple less-than sign -->
<!ENTITY Lleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Lleftarrow.gif&#34; ALT=&#34;Lleftarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left triple arrow -->
<!ENTITY Lmidot "&#x013F;">	<!-- LATIN CAPITAL LETTER L WITH MIDDLE DOT -->
<!ENTITY Longleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Longleftarrow.gif&#34; ALT=&#34;Longleftarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left long double arrow -->
<!ENTITY Longleftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Longleftrightarrow.gif&#34; ALT=&#34;Longleftrightarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left-rt long dbl arrow -->
<!ENTITY Longrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Longrightarrow.gif&#34; ALT=&#34;Longrightarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- right long double arrow -->
<!ENTITY Lsh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Lsh.gif&#34; ALT=&#34;Lsh&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up arrow left head -->
<!ENTITY Lslash "&#x0141;">	<!-- L slash -->
<!ENTITY Lstrok "&#x0141;">	<!-- LATIN CAPITAL LETTER L WITH STROKE -->
<!ENTITY Lt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Lt.gif&#34; ALT=&#34;Lt&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- double less-than sign -->
<!ENTITY Mbreve "M&#x0306;">	<!-- breve M -->
<!ENTITY Mcedil "M&#x0327;">	<!-- M cedilla -->
<!ENTITY Mcheck "M&#x030C;">	<!-- check M -->
<!ENTITY Mcy "&#x041C;">	<!-- CYRILLIC CAPITAL LETTER EM -->
<!ENTITY Mgr "&#x039C;">	<!-- GREEK CAPITAL LETTER MU -->
<!ENTITY NJcy "&#x040A;">	<!-- CYRILLIC CAPITAL LETTER NJE -->
<!ENTITY Nacute "&#x0143;">	<!-- LATIN CAPITAL LETTER N WITH ACUTE -->
<!ENTITY Nbreve "N&#x0306;">	<!-- breve N -->
<!ENTITY Ncaron "&#x0147;">	<!-- LATIN CAPITAL LETTER N WITH CARON -->
<!ENTITY Ncedil "&#x0145;">	<!-- LATIN CAPITAL LETTER N WITH CEDILLA -->
<!ENTITY Ncheck "&#x0147;">	<!-- check N -->
<!ENTITY Ncy "&#x041D;">	<!-- CYRILLIC CAPITAL LETTER EN -->
<!ENTITY Ngr "&#x039D;">	<!-- GREEK CAPITAL LETTER NU -->
<!ENTITY Ntilde "&#x00D1;">	<!-- LATIN CAPITAL LETTER N WITH TILDE -->
<!ENTITY OElig "&#x0152;">	<!-- LATIN CAPITAL LIGATURE OE -->
<!ENTITY OHacgr "&#x038F;">	<!-- GREEK CAPITAL LETTER OMEGA WITH TONOS -->
<!ENTITY OHgr "&#x03A9;">	<!-- GREEK CAPITAL LETTER OMEGA -->
<!ENTITY Oacgr "&#x038C;">	<!-- GREEK CAPITAL LETTER OMICRON WITH TONOS -->
<!ENTITY Oacute "&#x00D3;">	<!-- LATIN CAPITAL LETTER O WITH ACUTE -->
<!ENTITY Obreve "&#x014E;">	<!-- breve O -->
<!ENTITY Ocedil "O&#x0327;">	<!-- O cedilla -->
<!ENTITY Ocheck "&#x01D1;">	<!-- check O -->
<!ENTITY Ocirc "&#x00D4;">	<!-- LATIN CAPITAL LETTER O WITH CIRCUMFLEX -->
<!ENTITY Ocy "&#x041E;">	<!-- CYRILLIC CAPITAL LETTER O -->
<!ENTITY Odblac "&#x0150;">	<!-- LATIN CAPITAL LETTER O WITH DOUBLE ACUTE -->
<!ENTITY Ogr "&#x039F;">	<!-- GREEK CAPITAL LETTER OMICRON -->
<!ENTITY Ograve "&#x00D2;">	<!-- LATIN CAPITAL LETTER O WITH GRAVE -->
<!ENTITY Omacr "&#x014C;">	<!-- LATIN CAPITAL LETTER O WITH MACRON -->
<!ENTITY Omega "&#x03A9;">	<!-- capital Omega, Greek -->
<!ENTITY Oslash "&#x00D8;">	<!-- LATIN CAPITAL LETTER O WITH STROKE -->
<!ENTITY Otilde "&#x00D5;">	<!-- LATIN CAPITAL LETTER O WITH TILDE -->
<!ENTITY Ouml "&#x00D6;">	<!-- LATIN CAPITAL LETTER O WITH DIAERESIS -->
<!ENTITY P "&#x00B6;">	<!-- paragraph sign -->
<!ENTITY PHgr "&#x03A6;">	<!-- GREEK CAPITAL LETTER PHI -->
<!ENTITY PSgr "&#x03A8;">	<!-- GREEK CAPITAL LETTER PSI -->
<!ENTITY Pbreve "P&#x0306;">	<!-- breve P -->
<!ENTITY Pcedil "P&#x0327;">	<!-- P cedilla -->
<!ENTITY Pcheck "P&#x030C;">	<!-- check P -->
<!ENTITY Pcy "&#x041F;">	<!-- CYRILLIC CAPITAL LETTER PE -->
<!ENTITY Pgr "&#x03A0;">	<!-- GREEK CAPITAL LETTER PI -->
<!ENTITY Phi "&#x03A6;">	<!-- capital Phi, Greek -->
<!ENTITY Pi "&#x03A0;">	<!-- capital Pi, Greek -->
<!ENTITY Pr " Pr ">
<!ENTITY Prime "''">	<!-- double prime or second -->
<!ENTITY Psi "&#x03A8;">	<!-- capital Psi, Greek -->
<!ENTITY Qbreve "Q&#x0306;">	<!-- breve Q -->
<!ENTITY Qcedil "Q&#x0327;">	<!-- Q cedilla -->
<!ENTITY Qcheck "Q&#x030C;">	<!-- check Q -->
<!ENTITY Racute "&#x0154;">	<!-- LATIN CAPITAL LETTER R WITH ACUTE -->
<!ENTITY Rarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Rarr.gif&#34; ALT=&#34;Rarr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- twoheadrightarrow -->
<!ENTITY Rbreve "R&#x0306;">	<!-- breve R -->
<!ENTITY Rcaron "&#x0158;">	<!-- LATIN CAPITAL LETTER R WITH CARON -->
<!ENTITY Rcedil "&#x0156;">	<!-- LATIN CAPITAL LETTER R WITH CEDILLA -->
<!ENTITY Rcheck "&#x0158;">	<!-- check R -->
<!ENTITY Rcy "&#x0420;">	<!-- CYRILLIC CAPITAL LETTER ER -->
<!ENTITY Re "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Re.gif&#34; ALT=&#34;Re&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Real -->
<!ENTITY Rgr "&#x03A1;">	<!-- GREEK CAPITAL LETTER RHO -->
<!ENTITY Rightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Rightarrow.gif&#34; ALT=&#34;Rightarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- right double arrow -->
<!ENTITY Rrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Rrightarrow.gif&#34; ALT=&#34;Rrightarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- right triple arrow -->
<!ENTITY Rsh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Rsh.gif&#34; ALT=&#34;Rsh&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up arrow right head -->
<!ENTITY S "&#x00A7;">	<!-- section sign -->
<!ENTITY SHCHcy "&#x0429;">	<!-- CYRILLIC CAPITAL LETTER SHCHA -->
<!ENTITY SHcy "&#x0428;">	<!-- CYRILLIC CAPITAL LETTER SHA -->
<!ENTITY SOFTcy "&#x042C;">	<!-- CYRILLIC CAPITAL LETTER SOFT SIGN -->
<!ENTITY Sacute "&#x015A;">	<!-- LATIN CAPITAL LETTER S WITH ACUTE -->
<!ENTITY Sbreve "S&#x0306;">	<!-- breve S -->
<!ENTITY Scaron "&#x0160;">	<!-- LATIN CAPITAL LETTER S WITH CARON -->
<!ENTITY Scedil "&#x015E;">	<!-- LATIN CAPITAL LETTER S WITH CEDILLA -->
<!ENTITY Scheck "&#x0160;">	<!-- check S -->
<!ENTITY Scirc "&#x015C;">	<!-- LATIN CAPITAL LETTER S WITH CIRCUMFLEX -->
<!ENTITY Scy "&#x0421;">	<!-- CYRILLIC CAPITAL LETTER ES -->
<!ENTITY Sgr "&#x03A3;">	<!-- GREEK CAPITAL LETTER SIGMA -->
<!ENTITY Sigma "&#x03A3;">	<!-- capital Sigma, Greek -->
<!ENTITY Sub "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Sub.gif&#34; ALT=&#34;Sub&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- double subset -->
<!ENTITY Subset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Subset.gif&#34; ALT=&#34;Subset&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- double subset -->
<!ENTITY Sup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Sup.gif&#34; ALT=&#34;Sup&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dbl superset -->
<!ENTITY Supset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Supset.gif&#34; ALT=&#34;Supset&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- double superset -->
<!ENTITY THORN "&#x00DE;">	<!-- LATIN CAPITAL LETTER THORN -->
<!ENTITY THgr "&#x0398;">	<!-- GREEK CAPITAL LETTER THETA -->
<!ENTITY TM "&#x2122;">	<!-- trademark -->
<!ENTITY TSHcy "&#x040B;">	<!-- CYRILLIC CAPITAL LETTER TSHE -->
<!ENTITY TScy "&#x0426;">	<!-- CYRILLIC CAPITAL LETTER TSE -->
<!ENTITY Tbreve "T&#x0306;">	<!-- breve T -->
<!ENTITY Tcaron "&#x0164;">	<!-- LATIN CAPITAL LETTER T WITH CARON -->
<!ENTITY Tcedil "&#x0163;">	<!-- LATIN CAPITAL LETTER T WITH CEDILLA -->
<!ENTITY Tcheck "&#x0164;">	<!-- check T -->
<!ENTITY Tcy "&#x0422;">	<!-- CYRILLIC CAPITAL LETTER TE -->
<!ENTITY Tgr "&#x03A4;">	<!-- GREEK CAPITAL LETTER TAU -->
<!ENTITY Theta "&#x0398;">	<!-- capital Theta, Greek -->
<!ENTITY Tr "Tr">	<!-- Upright &#34;Tr&#34; for Trace -->
<!ENTITY Tstrok "&#x0166;">	<!-- LATIN CAPITAL LETTER T WITH STROKE -->
<!ENTITY Uacgr "&#x038E;">	<!-- GREEK CAPITAL LETTER UPSILON WITH TONOS -->
<!ENTITY Uacute "&#x00DA;">	<!-- LATIN CAPITAL LETTER U WITH ACUTE -->
<!ENTITY Ubrcy "&#x040E;">	<!-- CYRILLIC CAPITAL LETTER SHORT U -->
<!ENTITY Ubreve "&#x016C;">	<!-- LATIN CAPITAL LETTER U WITH BREVE -->
<!ENTITY Ucedil "U&#x0327;">	<!-- U cedilla -->
<!ENTITY Ucheck "&#x01D3;">	<!-- check U -->
<!ENTITY Ucirc "&#x00DB;">	<!-- LATIN CAPITAL LETTER U WITH CIRCUMFLEX -->
<!ENTITY Ucy "&#x0423;">	<!-- CYRILLIC CAPITAL LETTER U -->
<!ENTITY Udblac "&#x0170;">	<!-- LATIN CAPITAL LETTER U WITH DOUBLE ACUTE -->
<!ENTITY Udigr "&#x03AB;">	<!-- GREEK CAPITAL LETTER UPSILON WITH DIALYTIKA -->
<!ENTITY Ugr "&#x03A5;">
<!ENTITY Ugrave "&#x00D9;">	<!-- LATIN CAPITAL LETTER U WITH GRAVE -->
<!ENTITY Umacr "&#x016A;">	<!-- LATIN CAPITAL LETTER U WITH MACRON -->
<!ENTITY Uogon "&#x0172;">	<!-- LATIN CAPITAL LETTER U WITH OGONEK -->
<!ENTITY Uparrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Uparrow.gif&#34; ALT=&#34;Uparrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up double arrow -->
<!ENTITY Updownarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Updownarrow.gif&#34; ALT=&#34;Updownarrow&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- up-down double arrow -->
<!ENTITY Upsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Upsi.gif&#34; ALT=&#34;Upsilon&#34; ALIGN=&#34;BOTTOM&#34; /&#62;">	<!-- capital Upsilon, Greek -->
<!ENTITY Upsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Upsilon.gif&#34; ALT=&#34;Upsilon&#34; ALIGN=&#34;BOTTOM&#34; /&#62;">
<!ENTITY Uring "&#x016E;">	<!-- LATIN CAPITAL LETTER U WITH RING ABOVE -->
<!ENTITY Utilde "&#x0168;">	<!-- LATIN CAPITAL LETTER U WITH TILDE -->
<!ENTITY Uuml "&#x00DC;">	<!-- LATIN CAPITAL LETTER U WITH DIAERESIS -->
<!ENTITY Vbreve "V&#x0306;">	<!-- breve V -->
<!ENTITY Vcedil "V&#x0327;">	<!-- V cedilla -->
<!ENTITY Vcheck "V&#x030C;">	<!-- check V -->
<!ENTITY Vcy "&#x0412;">	<!-- CYRILLIC CAPITAL LETTER VE -->
<!ENTITY Vdash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Vdash.gif&#34; ALT=&#34;Vdash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dbl vertical, dash -->
<!ENTITY Verbar "||">	<!-- dbl vertical bar -->
<!ENTITY Vert "||">
<!ENTITY Vvdash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/Vvdash.gif&#34; ALT=&#34;Vvdash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triple vertical, dash -->
<!ENTITY Wbreve "W&#x0306;">	<!-- breve W -->
<!ENTITY Wcedil "W&#x0327;">	<!-- W cedilla -->
<!ENTITY Wcheck "W&#x030C;">	<!-- check W -->
<!ENTITY Wcirc "&#x0174;">	<!-- LATIN CAPITAL LETTER W WITH CIRCUMFLEX -->
<!ENTITY Xbreve "X&#x0306;">	<!-- breve X -->
<!ENTITY Xcedil "X&#x0327;">	<!-- X cedilla -->
<!ENTITY Xcheck "X&#x030C;">	<!-- check X -->
<!ENTITY Xgr "&#x039E;">	<!-- GREEK CAPITAL LETTER XI -->
<!ENTITY Xi "&#x039E;">	<!-- capital Xi, Greek -->
<!ENTITY YAcy "&#x042F;">	<!-- CYRILLIC CAPITAL LETTER YA -->
<!ENTITY YIcy "&#x0407;">	<!-- CYRILLIC CAPITAL LETTER YI -->
<!ENTITY YUcy "&#x042E;">	<!-- CYRILLIC CAPITAL LETTER YU -->
<!ENTITY Yacute "&#x00DD;">	<!-- LATIN CAPITAL LETTER Y WITH ACUTE -->
<!ENTITY Ybreve "Y&#x0306;">	<!-- breve Y -->
<!ENTITY Ycedil "Y&#x0327;">	<!-- Y cedilla -->
<!ENTITY Ycheck "Y&#x030C;">	<!-- check Y -->
<!ENTITY Ycirc "&#x0176;">	<!-- LATIN CAPITAL LETTER Y WITH CIRCUMFLEX -->
<!ENTITY Ycy "&#x042B;">	<!-- CYRILLIC CAPITAL LETTER YERU -->
<!ENTITY Yuml "&#x0178;">	<!-- LATIN CAPITAL LETTER Y WITH DIAERESIS -->
<!ENTITY ZHcy "&#x0416;">	<!-- CYRILLIC CAPITAL LETTER ZHE -->
<!ENTITY Zacute "&#x0179;">	<!-- LATIN CAPITAL LETTER Z WITH ACUTE -->
<!ENTITY Zbreve "Z&#x0306;">	<!-- breve Z -->
<!ENTITY Zcaron "&#x017D;">	<!-- LATIN CAPITAL LETTER Z WITH CARON -->
<!ENTITY Zcedil "Z&#x0327;">	<!-- Z cedilla -->
<!ENTITY Zcheck "&#x017D;">	<!-- check Z -->
<!ENTITY Zcy "&#x0417;">	<!-- CYRILLIC CAPITAL LETTER ZE -->
<!ENTITY Zdot "&#x017B;">	<!-- LATIN CAPITAL LETTER Z WITH DOT ABOVE -->
<!ENTITY Zgr "&#x0396;">	<!-- GREEK CAPITAL LETTER ZETA -->
<!ENTITY aacgr "&#x03AC;">	<!-- GREEK SMALL LETTER ALPHA WITH TONOS -->
<!ENTITY aacute "&#x00E1;">	<!-- LATIN SMALL LETTER A WITH ACUTE -->
<!ENTITY abreve "&#x0103;">	<!-- LATIN SMALL LETTER A WITH BREVE -->
<!ENTITY accepted ", accepted for publication ">
<!ENTITY acedil "a&#x0327;">	<!-- a cedilla -->
<!ENTITY acheck "&#x01CE;">	<!-- check a -->
<!ENTITY acirc "&#x00E2;">	<!-- LATIN SMALL LETTER A WITH CIRCUMFLEX -->
<!ENTITY acute "&#x0301;">	<!-- acute accent. MathML: x00B4 -->
<!ENTITY acuteA "&#x1D434;&#x0301;">	<!-- italic A acute -->
<!ENTITY acuteE "&#x1D438;&#x0301;">	<!-- italic E acute -->
<!ENTITY acuteI "&#x1D43C;&#x0301;">	<!-- italic I acute -->
<!ENTITY acuteO "&#x1D442;&#x0301;">	<!-- italic O acute -->
<!ENTITY acuteU "&#x1D448;&#x0301;">	<!-- italic U acute -->
<!ENTITY acuteY "&#x1D44C;&#x0301;">	<!-- italic Y acute -->
<!ENTITY acutea "&#x1D44E;&#x0301;">	<!-- italic a acute -->
<!ENTITY acutee "&#x1D452;&#x0301;">	<!-- italic e acute -->
<!ENTITY acutei "&#x1D456;&#x0301;">	<!-- italic i acute -->
<!ENTITY acuteo "&#x1D45C;&#x0301;">	<!-- italic o acute -->
<!ENTITY acuteu "&#x1D462;&#x0301;">	<!-- italic u acute -->
<!ENTITY acutey "&#x1D466;&#x0301;">	<!-- italic y acute -->
<!ENTITY acy "&#x0430;">	<!-- CYRILLIC SMALL LETTER A -->
<!ENTITY aelig "&#x00E6;">	<!-- LATIN SMALL LETTER AE -->
<!ENTITY agr "&#x03B1;">
<!ENTITY agrave "&#x00E0;">	<!-- LATIN SMALL LETTER A WITH GRAVE -->
<!ENTITY aleph "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/aleph.gif&#34; ALT=&#34;aleph&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- aleph, Hebrew -->
<!ENTITY alpha "&#x03B1;">	<!-- small alpha, Greek -->
<!ENTITY amacr "&#x0101;">	<!-- LATIN SMALL LETTER A WITH MACRON -->
<!ENTITY amalg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/amalg.gif&#34; ALT=&#34;amalg&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- amalgamation or coproduct -->
<!ENTITY and "&#x2227;">	<!-- logical and -->
<!ENTITY ang "&#x2220;">	<!-- angle -->
<!ENTITY ang90 "&#x221F;">	<!-- right angle -->
<!ENTITY angl0 "&#x3008;">	<!-- Left angle bracket (wide) -->
<!ENTITY angle "&#x2220;">	<!-- Angle -->
<!ENTITY angmsd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/angmsd.gif&#34; ALT=&#34;angmsd&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- angle-measured -->
<!ENTITY angr0 "&#x3009;">	<!-- Right angle bracket (wide) -->
<!ENTITY angsph "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/angsph.gif&#34; ALT=&#34;angsph&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- angle-spherical -->
<!ENTITY angst "&#x00C5;">	<!-- angstrom capital A, ring -->
<!ENTITY aogon "&#x0105;">	<!-- LATIN SMALL LETTER A WITH OGONEK -->
<!ENTITY ap "&#x2248;">	<!-- approximate -->
<!ENTITY ape "&#x224A;">	<!-- approximate, equals -->
<!ENTITY apos "&#x0027;">	<!-- apostrophe -->
<!ENTITY approx "&#x2248;">	<!-- appromiately equal -->
<!ENTITY approxeq "&#x224A;">	<!-- approximately equal -->
<!ENTITY arccos " arccos ">
<!ENTITY arcdeg "&#x00B0;">	<!-- Arc degrees -->
<!ENTITY arcmin "'">	<!-- Arc minutes -->
<!ENTITY arcsec "''">	<!-- Arc seconds -->
<!ENTITY arcsin " arcsin ">
<!ENTITY arctan " arctan ">
<!ENTITY arg " arg ">
<!ENTITY aring "&#x00E5;">	<!-- LATIN SMALL LETTER A WITH RING ABOVE -->
<!ENTITY ast "&#x002A;">	<!-- asterisk -->
<!ENTITY asymp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/asymp.gif&#34; ALT=&#34;asymp&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- asymptotically equal to. MathML has 2248 -->
<!ENTITY atilde "&#x00E3;">	<!-- LATIN SMALL LETTER A WITH TILDE -->
<!ENTITY auml "&#x00E4;">	<!-- LATIN SMALL LETTER A WITH DIAERESIS -->
<!ENTITY b.Delta "&#60;b&#62;&#x0394;&#60;/b&#62;">	<!-- bold Delta -->
<!ENTITY b.Gamma "&#60;b&#62;&#x0393;&#60;/b&#62;">	<!-- bold Gamma -->
<!ENTITY b.Lambda "&#60;b&#62;&#x039B;&#60;/b&#62;">	<!-- bold Lamda -->
<!ENTITY b.Omega "&#60;b&#62;&#x03A9;&#60;/b&#62;">	<!-- bold Omega -->
<!ENTITY b.Phi "&#60;b&#62;&#x03A6;&#60;/b&#62;">	<!-- bold Phi -->
<!ENTITY b.Pi "&#60;b&#62;&#x03A0;&#60;/b&#62;">	<!-- bold Pi -->
<!ENTITY b.Psi "&#60;b&#62;&#x03A8;&#60;/b&#62;">	<!-- bold Psi -->
<!ENTITY b.Sigma "&#60;b&#62;&#x03A3;&#60;/b&#62;">	<!-- bold Sigma -->
<!ENTITY b.Theta "&#60;b&#62;&#x0398;&#60;/b&#62;">	<!-- bold Theta -->
<!ENTITY b.Upsi "&#60;b&#62;&#x03A5;&#60;/b&#62;">	<!-- bold Upsilon -->
<!ENTITY b.Xi "&#60;b&#62;&#x039E;&#60;/b&#62;">	<!-- bold Xi -->
<!ENTITY b.alpha "&#60;b&#62;&#x03B1;&#60;/b&#62;">	<!-- bold alpha -->
<!ENTITY b.beta "&#60;b&#62;&#x03B2;&#60;/b&#62;">	<!-- bold beta -->
<!ENTITY b.chi "&#60;b&#62;&#x03C7;&#60;/b&#62;">	<!-- bold chi -->
<!ENTITY b.delta "&#60;b&#62;&#x03B4;&#60;/b&#62;">	<!-- bold delta -->
<!ENTITY b.epsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bepsilon.gif&#34; ALT=&#34;bold epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold straight epsilon -->
<!ENTITY b.epsis "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bepsilon.gif&#34; ALT=&#34;bold epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold straight epsilon -->
<!ENTITY b.epsiv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarepsilon.gif&#34; ALT=&#34;bold varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold curly epsilon -->
<!ENTITY b.eta "&#60;b&#62;&#x03B7;&#60;/b&#62;">	<!-- bold eta -->
<!ENTITY b.gamma "&#60;b&#62;&#x03B3;&#60;/b&#62;">	<!-- bold gamma -->
<!ENTITY b.gammad "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/digamma.gif&#34; ALT=&#34;bold digamma&#34; ALIGN=&#34;MIDDLE&#34; /&#62;">	<!-- bold digamma XXX -->
<!ENTITY b.iota "&#60;b&#62;&#x03B9;&#60;/b&#62;">	<!-- bold iota -->
<!ENTITY b.kappa "&#60;b&#62;&#x03BA;&#60;/b&#62;">	<!-- bold straight kappa -->
<!ENTITY b.kappav "&#60;b&#62;&#x03BA;&#60;/b&#62;">	<!-- bold variant kappa -->
<!ENTITY b.lambda "&#60;b&#62;&#x03BB;&#60;/b&#62;">	<!-- bold lamda -->
<!ENTITY b.mu "&#60;b&#62;&#x03BC;&#60;/b&#62;">	<!-- bold mu -->
<!ENTITY b.nu "&#60;b&#62;&#x03BD;&#60;/b&#62;">	<!-- bold nu -->
<!ENTITY b.omega "&#60;b&#62;&#x03C9;&#60;/b&#62;">	<!-- bold omega -->
<!ENTITY b.phis "&#60;b&#62;&#x03D5;&#60;/b&#62;">	<!-- bold straight phi -->
<!ENTITY b.phiv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarphi.gif&#34; ALT=&#34;bold varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold variant phi -->
<!ENTITY b.pi "&#60;b&#62;&#x03C0;&#60;/b&#62;">	<!-- bold pi -->
<!ENTITY b.piv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarpi.gif&#34; ALT=&#34;bold varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold variant pi -->
<!ENTITY b.psi "&#60;b&#62;&#x03C8;&#60;/b&#62;">	<!-- bold psi -->
<!ENTITY b.rho "&#60;b&#62;&#x03C1;&#60;/b&#62;">	<!-- bold rho -->
<!ENTITY b.rhov "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarrho.gif&#34; ALT=&#34;bold varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold variant rho -->
<!ENTITY b.sigma "&#60;b&#62;&#x03C3;&#60;/b&#62;">	<!-- bold sigma -->
<!ENTITY b.sigmav "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarsigma.gif&#34; ALT=&#34;bold varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold final sigma -->
<!ENTITY b.tau "&#60;b&#62;&#x03C4;&#60;/b&#62;">	<!-- bold tau -->
<!ENTITY b.thetas "&#60;b&#62;&#x03B8;&#60;/b&#62;">	<!-- bold straight theta -->
<!ENTITY b.thetav "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/b.thetav.gif&#34; ALT=&#34;bold vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold variant theta XXX -->
<!ENTITY b.upsi "&#60;b&#62;&#x03C5;&#60;/b&#62;">	<!-- bold upsilon -->
<!ENTITY b.xi "&#60;b&#62;&#x03BE;&#60;/b&#62;">	<!-- bold xi -->
<!ENTITY b.zeta "&#60;b&#62;&#x03B6;&#60;/b&#62;">	<!-- bold zeta -->
<!ENTITY bDelta "&#60;b&#62;&#x0394;&#60;/b&#62;">
<!ENTITY bGamma "&#60;b&#62;&#x0393;&#60;/b&#62;">
<!ENTITY bLambda "&#60;b&#62;&#x039B;&#60;/b&#62;">
<!ENTITY bOmega "&#60;b&#62;&#x03A9;&#60;/b&#62;">
<!ENTITY bPhi "&#60;b&#62;&#x03A6;&#60;/b&#62;">
<!ENTITY bPi "&#60;b&#62;&#x03A0;&#60;/b&#62;">
<!ENTITY bPsi "&#60;b&#62;&#x03A8;&#60;/b&#62;">
<!ENTITY bSigma "&#60;b&#62;&#x03A3;&#60;/b&#62;">
<!ENTITY bTheta "&#60;b&#62;&#x0398;&#60;/b&#62;">
<!ENTITY bUpsilon "&#60;b&#62;&#x03A5;&#60;/b&#62;">
<!ENTITY bXi "&#60;b&#62;&#x039E;&#60;/b&#62;">
<!ENTITY backepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/backepsilon.gif&#34; ALT=&#34;backepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- reversed epsilon -->
<!ENTITY backprime "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/backprime.gif&#34; ALT=&#34;backprime&#34; ALIGN=&#34;TOP&#34; /&#62;">	<!-- reversed prime -->
<!ENTITY backsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/backsim.gif&#34; ALT=&#34;backsim&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- reversed tilde -->
<!ENTITY backsimeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/backsimeq.gif&#34; ALT=&#34;backsimeq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- reversed tilde equals -->
<!ENTITY backslash "&#x005C;">	<!-- Backslash -->
<!ENTITY balpha "&#60;b&#62;&#x03B1;&#60;/b&#62;">
<!ENTITY bar0 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar0.gif&#34; ALT=&#34;bar 0&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 0 -->
<!ENTITY bar1 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar1.gif&#34; ALT=&#34;bar 1&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 1 -->
<!ENTITY bar2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar2.gif&#34; ALT=&#34;bar 2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 2 -->
<!ENTITY bar3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar3.gif&#34; ALT=&#34;bar 3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 3 -->
<!ENTITY bar4 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar4.gif&#34; ALT=&#34;bar 4&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 4 -->
<!ENTITY bar5 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar5.gif&#34; ALT=&#34;bar 5&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 5 -->
<!ENTITY bar6 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar6.gif&#34; ALT=&#34;bar 6&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 6 -->
<!ENTITY bar7 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar7.gif&#34; ALT=&#34;bar 7&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 7 -->
<!ENTITY bar8 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar8.gif&#34; ALT=&#34;bar 8&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 8 -->
<!ENTITY bar9 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bar9.gif&#34; ALT=&#34;bar 9&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar 9 -->
<!ENTITY barA "&#x0100;">	<!-- bar A -->
<!ENTITY barAlpha "&#x1FB9;">	<!-- bar Alpha -->
<!ENTITY barB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barB.gif&#34; ALT=&#34;bar B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar B -->
<!ENTITY barC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barC.gif&#34; ALT=&#34;bar C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar C -->
<!ENTITY barD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barD.gif&#34; ALT=&#34;bar D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar D -->
<!ENTITY barE "&#x0112;">	<!-- bar E -->
<!ENTITY barF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barF.gif&#34; ALT=&#34;bar F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar F -->
<!ENTITY barG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barG.gif&#34; ALT=&#34;bar G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar G -->
<!ENTITY barGamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barGamma.gif&#34; ALT=&#34;barGamma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar Gamma -->
<!ENTITY barH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barH.gif&#34; ALT=&#34;bar H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar H -->
<!ENTITY barI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barI.gif&#34; ALT=&#34;bar I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar I -->
<!ENTITY barIota "&#x1FD9;">	<!-- bar Iota -->
<!ENTITY barJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barJ.gif&#34; ALT=&#34;bar J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar J -->
<!ENTITY barK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barK.gif&#34; ALT=&#34;bar K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar K -->
<!ENTITY barL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barL.gif&#34; ALT=&#34;bar L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar L -->
<!ENTITY barM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barM.gif&#34; ALT=&#34;bar M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar M -->
<!ENTITY barN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barN.gif&#34; ALT=&#34;bar N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar N -->
<!ENTITY barO "&#x014C;">	<!-- bar O -->
<!ENTITY barP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barP.gif&#34; ALT=&#34;bar P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar P -->
<!ENTITY barQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barQ.gif&#34; ALT=&#34;bar Q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar Q -->
<!ENTITY barR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barR.gif&#34; ALT=&#34;bar R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar R -->
<!ENTITY barS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barS.gif&#34; ALT=&#34;bar S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar S -->
<!ENTITY barT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barT.gif&#34; ALT=&#34;bar T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar T -->
<!ENTITY barU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barU.gif&#34; ALT=&#34;bar U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar U -->
<!ENTITY barUpsilon "&#x1FE9;">	<!-- bar Upsilon -->
<!ENTITY barV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barV.gif&#34; ALT=&#34;bar V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar V -->
<!ENTITY barW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barW.gif&#34; ALT=&#34;bar W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar W -->
<!ENTITY barX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barX.gif&#34; ALT=&#34;bar X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar X -->
<!ENTITY barY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barY.gif&#34; ALT=&#34;bar Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar Y -->
<!ENTITY barZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barZ.gif&#34; ALT=&#34;bar Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar Z -->
<!ENTITY bara "&#x0101;">	<!-- bar a -->
<!ENTITY baralpha "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/baralpha.gif&#34; ALT=&#34;bar alpha&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar alpha -->
<!ENTITY barb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barb.gif&#34; ALT=&#34;bar b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar b -->
<!ENTITY barbeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barbeta.gif&#34; ALT=&#34;bar beta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar beta -->
<!ENTITY barc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barc.gif&#34; ALT=&#34;bar c&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar c -->
<!ENTITY barchi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barchi.gif&#34; ALT=&#34;bar chi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar chi -->
<!ENTITY bard "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bard.gif&#34; ALT=&#34;bar d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar d -->
<!ENTITY bardelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bardelta.gif&#34; ALT=&#34;bar delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar delta -->
<!ENTITY bare "&#x0113;">	<!-- bar e -->
<!ENTITY barepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barepsilon.gif&#34; ALT=&#34;bar epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar epsilon -->
<!ENTITY bareta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bareta.gif&#34; ALT=&#34;bar eta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar eta -->
<!ENTITY barf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barf.gif&#34; ALT=&#34;bar f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar f -->
<!ENTITY barg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barg.gif&#34; ALT=&#34;bar g&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar g -->
<!ENTITY bargamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bargamma.gif&#34; ALT=&#34;bar gamma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar gamma -->
<!ENTITY barh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barh.gif&#34; ALT=&#34;bar h&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar h -->
<!ENTITY bari "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bari.gif&#34; ALT=&#34;bar i&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar i -->
<!ENTITY bariota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bariota.gif&#34; ALT=&#34;bar iota&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar iota -->
<!ENTITY barj "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barj.gif&#34; ALT=&#34;bar j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar j -->
<!ENTITY bark "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bark.gif&#34; ALT=&#34;bar k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar k -->
<!ENTITY barkappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barkappa.gif&#34; ALT=&#34;bar kappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar kappa -->
<!ENTITY barl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barl.gif&#34; ALT=&#34;bar l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar l -->
<!ENTITY barlambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barlambda.gif&#34; ALT=&#34;bar lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar lambda -->
<!ENTITY barm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barm.gif&#34; ALT=&#34;bar m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar m -->
<!ENTITY barmu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barmu.gif&#34; ALT=&#34;bar mu&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar mu -->
<!ENTITY barn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barn.gif&#34; ALT=&#34;bar n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar n -->
<!ENTITY barnu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barnu.gif&#34; ALT=&#34;bar nu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar nu -->
<!ENTITY baro "&#x014D;">	<!-- bar o -->
<!ENTITY baromega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/baromega.gif&#34; ALT=&#34;bar omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar omega -->
<!ENTITY barp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barp.gif&#34; ALT=&#34;bar p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar p -->
<!ENTITY barpartial "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barpartial.gif&#34; ALT=&#34;bar partial&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar partial -->
<!ENTITY barphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barphi.gif&#34; ALT=&#34;bar phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar phi -->
<!ENTITY barpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barpi.gif&#34; ALT=&#34;bar pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar pi -->
<!ENTITY barpsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barpsi.gif&#34; ALT=&#34;bar psi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar psi -->
<!ENTITY barq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barq.gif&#34; ALT=&#34;bar q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar q -->
<!ENTITY barr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barr.gif&#34; ALT=&#34;bar r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar r -->
<!ENTITY barrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barrho.gif&#34; ALT=&#34;bar rho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar rho -->
<!ENTITY bars "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bars.gif&#34; ALT=&#34;bar s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar s -->
<!ENTITY barsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barsigma.gif&#34; ALT=&#34;bar sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar sigma -->
<!ENTITY bart "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bart.gif&#34; ALT=&#34;bar t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar t -->
<!ENTITY bartau "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bartau.gif&#34; ALT=&#34;bar tau&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar tau -->
<!ENTITY bartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bartheta.gif&#34; ALT=&#34;bar theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar theta -->
<!ENTITY baru "&#x016B;">	<!-- bar u -->
<!ENTITY barupsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barupsilon.gif&#34; ALT=&#34;bar upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar upsilon -->
<!ENTITY barv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barv.gif&#34; ALT=&#34;bar v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar v -->
<!ENTITY barvarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvarepsilon.gif&#34; ALT=&#34;bar varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar varepsilon -->
<!ENTITY barvarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvarphi.gif&#34; ALT=&#34;bar varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar varphi -->
<!ENTITY barvarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvarpi.gif&#34; ALT=&#34;bar varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar varpi -->
<!ENTITY barvarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvarrho.gif&#34; ALT=&#34;bar varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar varrho -->
<!ENTITY barvarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvarsigma.gif&#34; ALT=&#34;bar varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar varsigma -->
<!ENTITY barvartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barvartheta.gif&#34; ALT=&#34;bar vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar vartheta -->
<!ENTITY barw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barw.gif&#34; ALT=&#34;bar w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar w -->
<!ENTITY barwed "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barwed.gif&#34; ALT=&#34;barwed&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- logical and, bar above -->
<!ENTITY barwedge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barwedge.gif&#34; ALT=&#34;barwedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- projective -->
<!ENTITY barx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barx.gif&#34; ALT=&#34;bar x&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar x -->
<!ENTITY barxi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barxi.gif&#34; ALT=&#34;bar xi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar xi -->
<!ENTITY bary "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bary.gif&#34; ALT=&#34;bar y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar y -->
<!ENTITY barz "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barz.gif&#34; ALT=&#34;bar z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bar z -->
<!ENTITY barzeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/barzeta.gif&#34; ALT=&#34;bar zeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bar zeta -->
<!ENTITY bbeta "&#60;b&#62;&#x03B2;&#60;/b&#62;">
<!ENTITY bbreve "b&#x0306;">	<!-- breve b -->
<!ENTITY bcedil "b&#x0327;">	<!-- b cedilla -->
<!ENTITY bcheck "b&#x030C;">	<!-- check b -->
<!ENTITY bchi "&#60;b&#62;&#x03C7;&#60;/b&#62;">
<!ENTITY bcong "&#x224C;">	<!-- revers congruent -->
<!ENTITY bcy "&#x0431;">	<!-- CYRILLIC SMALL LETTER BE -->
<!ENTITY bdelta "&#60;b&#62;&#x03B4;&#60;/b&#62;">
<!ENTITY bdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bdot.gif&#34; ALT=&#34;bold dot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold middot/bullet -->
<!ENTITY becaus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/becaus.gif&#34; ALT=&#34;becaus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- because -->
<!ENTITY because "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/because.gif&#34; ALT=&#34;because&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- because -->
<!ENTITY bell "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bell.gif&#34; ALT=&#34;bold ell&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold ell -->
<!ENTITY bepsi "&#x03F6;">	<!-- such that -->
<!ENTITY bepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bepsilon.gif&#34; ALT=&#34;bold epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold straight epsilon -->
<!ENTITY bernou "&#x212C;">	<!-- Bernoulli function (script capital B) -->
<!ENTITY beta "&#x03B2;">	<!-- small beta, Greek -->
<!ENTITY beth "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/beth.gif&#34; ALT=&#34;beth&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- beth, Hebrew -->
<!ENTITY between "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/between.gif&#34; ALT=&#34;between&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- between -->
<!ENTITY bfeta "&#60;b&#62;&#x03B7;&#60;/b&#62;">
<!ENTITY bgamma "&#60;b&#62;&#x03B3;&#60;/b&#62;">
<!ENTITY bgr "&#x03B2;">	<!-- GREEK SMALL LETTER BETA -->
<!ENTITY bhatA "&#x1D400;&#x0302;">	<!-- bold hat A -->
<!ENTITY bhatB "&#x1D401;&#x0302;">	<!-- bold hat B -->
<!ENTITY bhatC "&#x1D402;&#x0302;">	<!-- bold hat C -->
<!ENTITY bhatD "&#x1D403;&#x0302;">	<!-- bold hat D -->
<!ENTITY bhatE "&#x1D404;&#x0302;">	<!-- bold hat E -->
<!ENTITY bhatF "&#x1D405;&#x0302;">	<!-- bold hat F -->
<!ENTITY bhatG "&#x1D406;&#x0302;">	<!-- bold hat G -->
<!ENTITY bhatH "&#x1D407;&#x0302;">	<!-- bold hat H -->
<!ENTITY bhatI "&#x1D408;&#x0302;">	<!-- bold hat I -->
<!ENTITY bhatJ "&#x1D409;&#x0302;">	<!-- bold hat J -->
<!ENTITY bhatK "&#x1D40A;&#x0302;">	<!-- bold hat K -->
<!ENTITY bhatL "&#x1D40B;&#x0302;">	<!-- bold hat L -->
<!ENTITY bhatM "&#x1D40C;&#x0302;">	<!-- bold hat M -->
<!ENTITY bhatN "&#x1D40D;&#x0302;">	<!-- bold hat N -->
<!ENTITY bhatO "&#x1D40E;&#x0302;">	<!-- bold hat O -->
<!ENTITY bhatP "&#x1D40F;&#x0302;">	<!-- bold hat P -->
<!ENTITY bhatQ "&#x1D410;&#x0302;">	<!-- bold hat Q -->
<!ENTITY bhatR "&#x1D411;&#x0302;">	<!-- bold hat R -->
<!ENTITY bhatS "&#x1D412;&#x0302;">	<!-- bold hat S -->
<!ENTITY bhatT "&#x1D413;&#x0302;">	<!-- bold hat T -->
<!ENTITY bhatU "&#x1D414;&#x0302;">	<!-- bold hat U -->
<!ENTITY bhatV "&#x1D415;&#x0302;">	<!-- bold hat V -->
<!ENTITY bhatW "&#x1D416;&#x0302;">	<!-- bold hat W -->
<!ENTITY bhatX "&#x1D417;&#x0302;">	<!-- bold hat X -->
<!ENTITY bhatY "&#x1D418;&#x0302;">	<!-- bold hat Y -->
<!ENTITY bhatZ "&#x1D419;&#x0302;">	<!-- bold hat Z -->
<!ENTITY bhata "&#x1D41A;&#x0302;">	<!-- bold hat a -->
<!ENTITY bhatb "&#x1D41B;&#x0302;">	<!-- bold hat b -->
<!ENTITY bhatc "&#x1D41C;&#x0302;">	<!-- bold hat c -->
<!ENTITY bhatd "&#x1D41D;&#x0302;">	<!-- bold hat d -->
<!ENTITY bhate "&#x1D41E;&#x0302;">	<!-- bold hat e -->
<!ENTITY bhatf "&#x1D41F;&#x0302;">	<!-- bold hat f -->
<!ENTITY bhatg "&#x1D420;&#x0302;">	<!-- bold hat g -->
<!ENTITY bhath "&#x1D421;&#x0302;">	<!-- bold hat h -->
<!ENTITY bhati "&#x1D422;&#x0302;">	<!-- bold hat i -->
<!ENTITY bhatj "&#x1D423;&#x0302;">	<!-- bold hat j -->
<!ENTITY bhatk "&#x1D424;&#x0302;">	<!-- bold hat k -->
<!ENTITY bhatl "&#x1D425;&#x0302;">	<!-- bold hat l -->
<!ENTITY bhatm "&#x1D426;&#x0302;">	<!-- bold hat m -->
<!ENTITY bhatn "&#x1D427;&#x0302;">	<!-- bold hat n -->
<!ENTITY bhato "&#x1D428;&#x0302;">	<!-- bold hat o -->
<!ENTITY bhatp "&#x1D429;&#x0302;">	<!-- bold hat p -->
<!ENTITY bhatq "&#x1D42A;&#x0302;">	<!-- bold hat q -->
<!ENTITY bhatr "&#x1D42B;&#x0302;">	<!-- bold hat r -->
<!ENTITY bhats "&#x1D42C;&#x0302;">	<!-- bold hat s -->
<!ENTITY bhatt "&#x1D42D;&#x0302;">	<!-- bold hat t -->
<!ENTITY bhatu "&#x1D42E;&#x0302;">	<!-- bold hat u -->
<!ENTITY bhatv "&#x1D42F;&#x0302;">	<!-- bold hat v -->
<!ENTITY bhatw "&#x1D430;&#x0302;">	<!-- bold hat w -->
<!ENTITY bhatx "&#x1D431;&#x0302;">	<!-- bold hat x -->
<!ENTITY bhaty "&#x1D432;&#x0302;">	<!-- bold hat y -->
<!ENTITY bhatz "&#x1D433;&#x0302;">	<!-- bold hat z -->
<!ENTITY bigcap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigcap.gif&#34; ALT=&#34;bigcap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large intersection -->
<!ENTITY bigcirc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigcirc.gif&#34; ALT=&#34;bigcirc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large circle -->
<!ENTITY bigcup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigcup.gif&#34; ALT=&#34;bigcup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large union -->
<!ENTITY bigodot "&#x2299;">	<!-- Large circled dot -->
<!ENTITY bigsqcup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigsqcup.gif&#34; ALT=&#34;bigsqcup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large square union -->
<!ENTITY bigstar "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigstar.gif&#34; ALT=&#34;bigstar&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- big star -->
<!ENTITY bigtriangledown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigtriangledown.gif&#34; ALT=&#34;bigtriangledown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large down pointing triangle -->
<!ENTITY bigtriangleup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigtriangleup.gif&#34; ALT=&#34;bigtriangleup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large up pointing triangle -->
<!ENTITY bigvee "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigvee.gif&#34; ALT=&#34;bigvee&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large logical or -->
<!ENTITY bigwedge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigwedge.gif&#34; ALT=&#34;bigwedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Large logical and -->
<!ENTITY bimath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bimath.gif&#34; ALT=&#34;bold imath&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- (bold) imath -->
<!ENTITY binfty "&#60;b&#62;&#x221E;&#60;/b&#62;">	<!-- (bold) infinity -->
<!ENTITY biota "&#60;b&#62;&#x03B9;&#60;/b&#62;">
<!ENTITY bitDelta "&#60;b&#62;&#60;i&#62;&#x0394;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Delta -->
<!ENTITY bitGamma "&#60;b&#62;&#60;i&#62;&#x0393;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Gamma -->
<!ENTITY bitLambda "&#60;b&#62;&#60;i&#62;&#x039B;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Lambda -->
<!ENTITY bitOmega "&#60;b&#62;&#60;i&#62;&#x03A9;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Omega -->
<!ENTITY bitPhi "&#60;b&#62;&#60;i&#62;&#x03A6;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Phi -->
<!ENTITY bitPi "&#60;b&#62;&#60;i&#62;&#x03A0;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Pi -->
<!ENTITY bitPsi "&#60;b&#62;&#60;i&#62;&#x03A8;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Psi -->
<!ENTITY bitSigma "&#60;b&#62;&#60;i&#62;&#x03A3;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Sigma -->
<!ENTITY bitTheta "&#60;b&#62;&#60;i&#62;&#x0398;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Theta -->
<!ENTITY bitUpsilon "&#60;b&#62;&#60;i&#62;&#x03A5;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Upsilon -->
<!ENTITY bitXi "&#60;b&#62;&#60;i&#62;&#x039E;&#60;/i&#62;&#60;/b&#62;">	<!-- bold italic Xi -->
<!ENTITY bjmath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bjmath.gif&#34; ALT=&#34;bold jmath&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- (bold) jmath -->
<!ENTITY bkappa "&#60;b&#62;&#x03BA;&#60;/b&#62;">
<!ENTITY blacklozenge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacklozenge.gif&#34; ALT=&#34;blacklozenge&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- black lozenge -->
<!ENTITY blacksquare "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacksquare.gif&#34; ALT=&#34;blacksquare&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- black square -->
<!ENTITY blacktriangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacktriangle.gif&#34; ALT=&#34;blacktriangle&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up black triangle -->
<!ENTITY blacktriangledown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacktriangledown.gif&#34; ALT=&#34;blacktriangledown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down black triangle -->
<!ENTITY blacktriangleleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacktriangleleft.gif&#34; ALT=&#34;blacktriangleleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left black triangle -->
<!ENTITY blacktriangleright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/blacktriangleright.gif&#34; ALT=&#34;blacktriangleright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right black triangle -->
<!ENTITY blambda "&#60;b&#62;&#x03BB;&#60;/b&#62;">
<!ENTITY blank "&#x2423;">	<!-- significant blank symbol -->
<!ENTITY blk12 "&#x2592;">	<!-- 50% shaded block -->
<!ENTITY blk14 "&#x2591;">	<!-- 25% shaded block -->
<!ENTITY blk34 "&#x2593;">	<!-- 75% shaded block -->
<!ENTITY block "&#x2588;">	<!-- full block -->
<!ENTITY bmu "&#60;b&#62;&#x03BC;&#60;/b&#62;">
<!ENTITY bnabla "&#60;b&#62;&#x2207;&#60;/b&#62;">
<!ENTITY bnu "&#60;b&#62;&#x03BD;&#60;/b&#62;">
<!ENTITY bomega "&#60;b&#62;&#x03C9;&#60;/b&#62;">	<!-- Miscellaneous maths characters -->
<!ENTITY bot "&#x22A5;">	<!-- Bottom -->
<!ENTITY bottom "&#x22A5;">	<!-- bottom -->
<!ENTITY bowtie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bowtie.gif&#34; ALT=&#34;bowtie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bowtie -->
<!ENTITY boxDL "&#x2557;">	<!-- lower left quadrant, double -->
<!ENTITY boxDR "&#x2554;">	<!-- lower right quadrant, double -->
<!ENTITY boxDl "&#x2556;">	<!-- lower left quadrant, double down -->
<!ENTITY boxDr "&#x2553;">	<!-- lower right quadrant, double down -->
<!ENTITY boxH "&#x2550;">	<!-- horizontal line, double -->
<!ENTITY boxHD "&#x2566;">	<!-- lower quadrants, double -->
<!ENTITY boxHU "&#x2569;">	<!-- upper quadrants, double -->
<!ENTITY boxHd "&#x2564;">	<!-- lower quadrants, double horizontal -->
<!ENTITY boxHu "&#x2567;">	<!-- upper quadrants, double horizontal -->
<!ENTITY boxUL "&#x255D;">	<!-- upper left quadrant, double -->
<!ENTITY boxUR "&#x255A;">	<!-- upper right quadrant, double -->
<!ENTITY boxUl "&#x255C;">	<!-- upper left quadrant, double up -->
<!ENTITY boxUr "&#x2559;">	<!-- upper right quadrant, double up -->
<!ENTITY boxV "&#x2551;">	<!-- vertical line, double -->
<!ENTITY boxVH "&#x256C;">	<!-- all four quadrants, double -->
<!ENTITY boxVL "&#x2563;">	<!-- left quadrants, double -->
<!ENTITY boxVR "&#x2560;">	<!-- right quadrants, double -->
<!ENTITY boxVh "&#x256B;">	<!-- all four quadrants, double vertical -->
<!ENTITY boxVl "&#x2562;">	<!-- left quadrants, double vertical -->
<!ENTITY boxVr "&#x255F;">	<!-- right quadrants, double vertical -->
<!ENTITY boxdL "&#x2555;">	<!-- lower left quadrant, double left -->
<!ENTITY boxdR "&#x2552;">	<!-- lower right quadrant, double right -->
<!ENTITY boxdl "&#x2510;">	<!-- lower left quadrant -->
<!ENTITY boxdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/boxdot.gif&#34; ALT=&#34;boxdot&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot in box -->
<!ENTITY boxdr "&#x250C;">	<!-- lower right quadrant -->
<!ENTITY boxh "&#x2500;">	<!-- horizontal line -->
<!ENTITY boxhD "&#x2565;">	<!-- lower quadrants, double down -->
<!ENTITY boxhU "&#x2568;">	<!-- upper quadrants, double down -->
<!ENTITY boxhd "&#x252C;">	<!-- lower quadrants -->
<!ENTITY boxhu "&#x2534;">	<!-- upper quadrants -->
<!ENTITY boxminus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/boxminus.gif&#34; ALT=&#34;boxminus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- minus sign in box -->
<!ENTITY boxplus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/boxplus.gif&#34; ALT=&#34;boxplus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- plus sign in box -->
<!ENTITY boxtimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/boxtimes.gif&#34; ALT=&#34;boxtimes&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- times sign in box -->
<!ENTITY boxuL "&#x255B;">	<!-- upper left quadrant, double left -->
<!ENTITY boxuR "&#x2558;">	<!-- upper right quadrant, double right -->
<!ENTITY boxul "&#x2518;">	<!-- upper left quadrant -->
<!ENTITY boxur "&#x2514;">	<!-- upper right quadrant -->
<!ENTITY boxv "&#x2502;">	<!-- vertical line -->
<!ENTITY boxvH "&#x256A;">	<!-- all four quadrants, double horizontal -->
<!ENTITY boxvL "&#x2561;">	<!-- left quadrants, double left -->
<!ENTITY boxvR "&#x255E;">	<!-- right quadrants, double right -->
<!ENTITY boxvh "&#x253C;">	<!-- all four quadrants -->
<!ENTITY boxvl "&#x2524;">	<!-- left quadrants -->
<!ENTITY boxvr "&#x251C;">	<!-- right quadrants -->
<!ENTITY bpartial "&#60;b&#62;&#x2202;&#60;/b&#62;">	<!-- bold partial differential d -->
<!ENTITY bphi "&#60;b&#62;&#x03D5;&#60;/b&#62;">
<!ENTITY bpi "&#60;b&#62;&#x03C0;&#60;/b&#62;">
<!ENTITY bprime "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bprime.gif&#34; ALT=&#34;bprime&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- reverse prime -->
<!ENTITY bpsi "&#60;b&#62;&#x03C8;&#60;/b&#62;">
<!ENTITY breve "&#x0306;">	<!-- breve. MathML: x02DB -->
<!ENTITY brho "&#60;b&#62;&#x03C1;&#60;/b&#62;">
<!ENTITY brvbar "&#x00A6;">	<!-- broken (vertical) bar -->
<!ENTITY bsigma "&#60;b&#62;&#x03C3;&#60;/b&#62;">
<!ENTITY bsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bsim.gif&#34; ALT=&#34;bsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- reverse similar -->
<!ENTITY bsime "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bsime.gif&#34; ALT=&#34;bsime&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- reverse similar, eq -->
<!ENTITY bsol "&#x005C;">	<!-- reverse solidus -->
<!ENTITY btau "&#60;b&#62;&#x03C4;&#60;/b&#62;">
<!ENTITY btheta "&#60;b&#62;&#x03B8;&#60;/b&#62;">
<!ENTITY btimes "&#60;b&#62;&#x00D7;&#60;/b&#62;">	<!-- (bold) times sign -->
<!ENTITY bull "&#x2022;">	<!-- round bullet, filled -->
<!ENTITY bullet "&#x2022;">	<!-- Bullet -->
<!ENTITY bump "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bump.gif&#34; ALT=&#34;bump&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bumpy equals -->
<!ENTITY bumpe "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bumpe.gif&#34; ALT=&#34;bumpe&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bumpy equals, equals -->
<!ENTITY bumpeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bumpeq.gif&#34; ALT=&#34;bumpeq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equals with bump above -->
<!ENTITY bupsilon "&#60;b&#62;&#x03C5;&#60;/b&#62;">
<!ENTITY bvarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarepsilon.gif&#34; ALT=&#34;bold varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- bold curly epsilon -->
<!ENTITY bvarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarphi.gif&#34; ALT=&#34;bold varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY bvarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarpi.gif&#34; ALT=&#34;bold varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY bvarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarrho.gif&#34; ALT=&#34;bold varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY bvarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarsigma.gif&#34; ALT=&#34;bold varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold final sigma -->
<!ENTITY bvartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvartheta.gif&#34; ALT=&#34;bold vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- XXX -->
<!ENTITY bvarzeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bvarzeta.gif&#34; ALT=&#34;bold varzeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- bold zeta (no UCS var) -->
<!ENTITY bxi "&#60;b&#62;&#x03BE;&#60;/b&#62;">
<!ENTITY bzeta "&#60;b&#62;&#x03B6;&#60;/b&#62;">
<!ENTITY cacute "&#x0107;">	<!-- LATIN SMALL LETTER C WITH ACUTE -->
<!ENTITY calA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calA.gif&#34; ALT=&#34;Script A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script A -->
<!ENTITY calB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calB.gif&#34; ALT=&#34;Script B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script B -->
<!ENTITY calC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calC.gif&#34; ALT=&#34;Script C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script C -->
<!ENTITY calD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calD.gif&#34; ALT=&#34;Script D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script D -->
<!ENTITY calE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calE.gif&#34; ALT=&#34;Script E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script E -->
<!ENTITY calF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calF.gif&#34; ALT=&#34;Script F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script F -->
<!ENTITY calG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calG.gif&#34; ALT=&#34;Script G&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Script G -->
<!ENTITY calH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calH.gif&#34; ALT=&#34;Script H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script H -->
<!ENTITY calI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calI.gif&#34; ALT=&#34;Script I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script I -->
<!ENTITY calJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calJ.gif&#34; ALT=&#34;Script J&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Script J -->
<!ENTITY calK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calK.gif&#34; ALT=&#34;Script K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script K -->
<!ENTITY calL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calL.gif&#34; ALT=&#34;Script L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script L -->
<!ENTITY calM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calM.gif&#34; ALT=&#34;Script M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script M -->
<!ENTITY calN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calN.gif&#34; ALT=&#34;Script N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script N -->
<!ENTITY calO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calO.gif&#34; ALT=&#34;Script O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script O -->
<!ENTITY calP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calP.gif&#34; ALT=&#34;Script P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script P -->
<!ENTITY calQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calQ.gif&#34; ALT=&#34;Script Q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Script Q -->
<!ENTITY calR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calR.gif&#34; ALT=&#34;Script R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script R -->
<!ENTITY calS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calS.gif&#34; ALT=&#34;Script S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script S -->
<!ENTITY calT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calT.gif&#34; ALT=&#34;Script T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script T -->
<!ENTITY calU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calU.gif&#34; ALT=&#34;Script U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script U -->
<!ENTITY calV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calV.gif&#34; ALT=&#34;Script V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script V -->
<!ENTITY calW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calW.gif&#34; ALT=&#34;Script W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script W -->
<!ENTITY calX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calX.gif&#34; ALT=&#34;Script X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script X -->
<!ENTITY calY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calY.gif&#34; ALT=&#34;Script Y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Script Y -->
<!ENTITY calZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calZ.gif&#34; ALT=&#34;Script Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Script Z -->
<!ENTITY cap "&#x2229;">	<!-- intersection -->
<!ENTITY caret "&#x2041;">	<!-- caret (insertion mark) -->
<!ENTITY caron "&#x030C;">	<!-- caron/hacek. MathML: x02C7 -->
<!ENTITY cbreve "c&#x0306;">	<!-- breve c -->
<!ENTITY ccaron "&#x010D;">	<!-- LATIN SMALL LETTER C WITH CARON -->
<!ENTITY ccedil "&#x00E7;">	<!-- LATIN SMALL LETTER C WITH CEDILLA -->
<!ENTITY ccheck "&#x010D;">	<!-- check c -->
<!ENTITY ccirc "&#x0109;">	<!-- LATIN SMALL LETTER C WITH CIRCUMFLEX -->
<!ENTITY cdot "&#x22C5;">	<!-- central dot, despite Latin-2 -->
<!ENTITY cdots "&#x22EF;">	<!-- central ellipsis -->
<!ENTITY cedil "&#x0327;">	<!-- cedilla. MathML: x00B8 -->
<!ENTITY cent "&#x00A2;">	<!-- cent sign -->
<!ENTITY centerdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/centerdot.gif&#34; ALT=&#34;centerdot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- central dot -->
<!ENTITY chcy "&#x0447;">	<!-- CYRILLIC SMALL LETTER CHE -->
<!ENTITY check "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/surd.gif&#34; ALT=&#34;check mark&#34; ALIGN=&#34;MIDDLE&#34; /&#62;">	<!-- tick, check mark -->
<!ENTITY chi "&#x03C7;">	<!-- small chi, Greek -->
<!ENTITY cir "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/bigcirc.gif&#34; ALT=&#34;circle&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- circle, open -->
<!ENTITY circ "o">	<!-- circumflex accent. MathML: x02C6 -->
<!ENTITY circeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circeq.gif&#34; ALT=&#34;circeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- equals with circle above -->
<!ENTITY circle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circle.gif&#34; ALT=&#34;circle&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- White circle -->
<!ENTITY circlearrowleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circlearrowleft.gif&#34; ALT=&#34;circlearrowleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left circle arrow -->
<!ENTITY circlearrowright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circlearrowright.gif&#34; ALT=&#34;circlearrowright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right circle arrow -->
<!ENTITY circledS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circledS.gif&#34; ALT=&#34;circledS&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- S in circle -->
<!ENTITY circledast "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circledast.gif&#34; ALT=&#34;circledast&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- circled asterisk -->
<!ENTITY circledcirc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circledcirc.gif&#34; ALT=&#34;circledcirc&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- circled circle -->
<!ENTITY circleddash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/circleddash.gif&#34; ALT=&#34;circleddash&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- circled dash -->
<!ENTITY cire "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cire.gif&#34; ALT=&#34;cire&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- circle, equals -->
<!ENTITY clubs "&#x2663;">	<!-- club suit symbol -->
<!ENTITY clubsuit "&#x2663;">	<!-- Black club suit -->
<!ENTITY colon ":">	<!-- colon -->
<!ENTITY colone ":=">	<!-- double colon, equals -->
<!ENTITY comma ",">	<!-- comma -->
<!ENTITY commat "&#x0040;">	<!-- commercial at -->
<!ENTITY comp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/comp.gif&#34; ALT=&#34;comp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- complement sign -->
<!ENTITY compfn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/compfn.gif&#34; ALT=&#34;compfn&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- composite function (small circle) -->
<!ENTITY complement "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/complement.gif&#34; ALT=&#34;complement&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- complement -->
<!ENTITY cong "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cong.gif&#34; ALT=&#34;cong&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- congruent with -->
<!ENTITY conint "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/conint.gif&#34; ALT=&#34;conint&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- contour integral operator -->
<!ENTITY coprod "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/coprod.gif&#34; ALT=&#34;coprod&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- coproduct operator -->
<!ENTITY copy "&#x00A9;">	<!-- copyright sign -->
<!ENTITY copysr "&#x2117;">	<!-- sound recording copyright sign -->
<!ENTITY cos " cos ">
<!ENTITY cosh " cosh ">
<!ENTITY cot " cot ">
<!ENTITY coth " coth ">
<!ENTITY cross "&#x2717;">	<!-- ballot cross -->
<!ENTITY csc " csc ">
<!ENTITY cuepr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cuepr.gif&#34; ALT=&#34;cuepr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- curly eq, precedes -->
<!ENTITY cuesc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cuesc.gif&#34; ALT=&#34;cuesc&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- curly eq, succeeds -->
<!ENTITY cularr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cularr.gif&#34; ALT=&#34;cularr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left curved arrow -->
<!ENTITY cup "&#x222A;">	<!-- union or logical sum -->
<!ENTITY cupre "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cupre.gif&#34; ALT=&#34;cupre&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- . Not in MathML -->
<!ENTITY curarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curarr.gif&#34; ALT=&#34;curarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt curved arrow -->
<!ENTITY curlyeqprec "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curlyeqprec.gif&#34; ALT=&#34;curlyeqprec&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equal or precedes -->
<!ENTITY curlyeqsucc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curlyeqsucc.gif&#34; ALT=&#34;curlyeqsucc&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equal or succeeds -->
<!ENTITY curlyvee "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curlyvee.gif&#34; ALT=&#34;curlyvee&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- curly logical or -->
<!ENTITY curlywedge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curlywedge.gif&#34; ALT=&#34;curlywedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- curly logical and -->
<!ENTITY curren "&#x00A4;">	<!-- general currency sign -->
<!ENTITY curvearrowleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curvearrowleft.gif&#34; ALT=&#34;curvearrowleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left curved arrow -->
<!ENTITY curvearrowright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/curvearrowright.gif&#34; ALT=&#34;curvearrowright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right curved arrow -->
<!ENTITY cuvee "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cuvee.gif&#34; ALT=&#34;cuvee&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- curly logical or -->
<!ENTITY cuwed "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/cuwed.gif&#34; ALT=&#34;cuwed&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- curly logical and -->
<!ENTITY dArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dArr.gif&#34; ALT=&#34;dArr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- down dbl arrow -->
<!ENTITY dag "&#x2020;">	<!-- Dagger -->
<!ENTITY dagger "&#x2020;">	<!-- dagger -->
<!ENTITY daleth "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/daleth.gif&#34; ALT=&#34;daleth&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dalet, Hebrew -->
<!ENTITY darr "&#x2193;">	<!-- downward arrow -->
<!ENTITY darr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/darr2.gif&#34; ALT=&#34;darr2&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- two down arrows (now ddarr) -->
<!ENTITY dash "&#x2010;">	<!-- hyphen (true graphic) -->
<!ENTITY dashv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dashv.gif&#34; ALT=&#34;dashv&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dash, vertical -->
<!ENTITY dblac "&#x030B;">	<!-- double acute accent. MathML: x02DD -->
<!ENTITY dbond "=">
<!ENTITY dbreve "d&#x0306;">	<!-- breve d -->
<!ENTITY dcaron "&#x010F;">	<!-- LATIN SMALL LETTER D WITH CARON -->
<!ENTITY dcedil "&#x1E11;">	<!-- d cedilla -->
<!ENTITY dcheck "&#x010F;">	<!-- check d -->
<!ENTITY dcy "&#x0434;">	<!-- CYRILLIC SMALL LETTER DE -->
<!ENTITY ddag "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ddag.gif&#34; ALT=&#34;ddagger&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Double dagger -->
<!ENTITY ddagger "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ddagger.gif&#34; ALT=&#34;ddagger&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Double dagger -->
<!ENTITY ddiff "d">	<!-- Upright &#34;d&#34; for differential d -->
<!ENTITY deg "&#x00B0;">	<!-- degree sign -->
<!ENTITY degree "&#x00B0;">	<!-- degree sign -->
<!ENTITY delta "&#x03B4;">	<!-- small delta, Greek -->
<!ENTITY det " det ">
<!ENTITY dgr "&#x03B4;">	<!-- GREEK SMALL LETTER DELTA -->
<!ENTITY dharl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dharl.gif&#34; ALT=&#34;dharl&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dn harpoon-left -->
<!ENTITY dharr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dharr.gif&#34; ALT=&#34;dharr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- down harpoon-rt -->
<!ENTITY diagdown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/diagdown.gif&#34; ALT=&#34;diagdown&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- diagonal line downwards -->
<!ENTITY diagup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/diagup.gif&#34; ALT=&#34;diagup&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- diagonal line upwards -->
<!ENTITY diam "&#x25CA;">	<!-- open diamond -->
<!ENTITY diamond "&#x25CA;">	<!-- White diamond -->
<!ENTITY diamondsuit "&#x25CA;">	<!-- White diamond suit -->
<!ENTITY diams "&#x2666;">	<!-- diamond suit symbol -->
<!ENTITY die "&#x0308;">	<!-- diaeresis. MathML: x00A8 -->
<!ENTITY digamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/digamma.gif&#34; ALT=&#34;digamma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- digamma -->
<!ENTITY dim " dim ">
<!ENTITY div "&#x00F7;">	<!-- Division -->
<!ENTITY divide "&#x00F7;">	<!-- division sign -->
<!ENTITY divideontimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/divideontimes.gif&#34; ALT=&#34;divideontimes&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- divide/times overprint -->
<!ENTITY divonx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/divonx.gif&#34; ALT=&#34;divonx&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- division on times -->
<!ENTITY djcy "&#x0452;">	<!-- CYRILLIC SMALL LETTER DJE -->
<!ENTITY dlarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dlarr.gif&#34; ALT=&#34;dlarr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- SW pointing arrow (now swarr) -->
<!ENTITY dlcorn "&#x231E;">	<!-- lower left corner -->
<!ENTITY dlcrop "&#x230D;">	<!-- downward left crop mark -->
<!ENTITY dollar "$">	<!-- dollar sign -->
<!ENTITY dot "&#x0307;">	<!-- dot above. MathML: x02D9 -->
<!ENTITY dotA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotA.gif&#34; ALT=&#34;dot A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot A -->
<!ENTITY dotB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotB.gif&#34; ALT=&#34;dot B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot B -->
<!ENTITY dotC "&#x010A;">	<!-- dot C -->
<!ENTITY dotD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotD.gif&#34; ALT=&#34;dot D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot D -->
<!ENTITY dotE "&#x0116;">	<!-- dot E -->
<!ENTITY dotF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotF.gif&#34; ALT=&#34;dot F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot F -->
<!ENTITY dotG "&#x0120;">	<!-- dot G -->
<!ENTITY dotH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotH.gif&#34; ALT=&#34;dot H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot H -->
<!ENTITY dotI "&#x0130;">	<!-- dot I -->
<!ENTITY dotJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotJ.gif&#34; ALT=&#34;dot J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot J -->
<!ENTITY dotK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotK.gif&#34; ALT=&#34;dot K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot K -->
<!ENTITY dotL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotL.gif&#34; ALT=&#34;dot L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot L -->
<!ENTITY dotM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotM.gif&#34; ALT=&#34;dot M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot M -->
<!ENTITY dotN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotN.gif&#34; ALT=&#34;dot N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot N -->
<!ENTITY dotO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotO.gif&#34; ALT=&#34;dot O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot O -->
<!ENTITY dotP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotP.gif&#34; ALT=&#34;dot P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot P -->
<!ENTITY dotQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotQ.gif&#34; ALT=&#34;dot Q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot Q -->
<!ENTITY dotR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotR.gif&#34; ALT=&#34;dot R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot R -->
<!ENTITY dotS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotS.gif&#34; ALT=&#34;dot S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot S -->
<!ENTITY dotT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotT.gif&#34; ALT=&#34;dot T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot T -->
<!ENTITY dotU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotU.gif&#34; ALT=&#34;dot U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot U -->
<!ENTITY dotV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotV.gif&#34; ALT=&#34;dot V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot V -->
<!ENTITY dotW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotW.gif&#34; ALT=&#34;dot W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot W -->
<!ENTITY dotX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotX.gif&#34; ALT=&#34;dot X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot X -->
<!ENTITY dotY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotY.gif&#34; ALT=&#34;dot Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot Y -->
<!ENTITY dotZ "&#x017B;">	<!-- dot Z -->
<!ENTITY dota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dota.gif&#34; ALT=&#34;dot a&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot a -->
<!ENTITY dotalpha "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotalpha.gif&#34; ALT=&#34;dot alpha&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot alpha -->
<!ENTITY dotb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotb.gif&#34; ALT=&#34;dot b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot b -->
<!ENTITY dotbeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotbeta.gif&#34; ALT=&#34;dot beta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot beta -->
<!ENTITY dotc "&#x010B;">	<!-- dot c -->
<!ENTITY dotchi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotchi.gif&#34; ALT=&#34;dot chi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot chi -->
<!ENTITY dotd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotd.gif&#34; ALT=&#34;dot d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot d -->
<!ENTITY dotdelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotdelta.gif&#34; ALT=&#34;dot delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot delta -->
<!ENTITY dote "&#x0117;">	<!-- dot e -->
<!ENTITY dotell "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotell.gif&#34; ALT=&#34;dot ell&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot ell -->
<!ENTITY dotepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotepsilon.gif&#34; ALT=&#34;dot epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot epsilon -->
<!ENTITY doteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doteq.gif&#34; ALT=&#34;doteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot over equal -->
<!ENTITY doteqdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doteqdot.gif&#34; ALT=&#34;doteqdot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equal with dot above and below -->
<!ENTITY doteta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doteta.gif&#34; ALT=&#34;dot eta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot eta -->
<!ENTITY dotf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotf.gif&#34; ALT=&#34;dot f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot f -->
<!ENTITY dotg "&#x0121;">	<!-- dot g -->
<!ENTITY dotgamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotgamma.gif&#34; ALT=&#34;dot gamma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot gamma -->
<!ENTITY doth "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doth.gif&#34; ALT=&#34;dot h&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot h -->
<!ENTITY doti "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doti.gif&#34; ALT=&#34;dot i&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot i -->
<!ENTITY dotiota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotiota.gif&#34; ALT=&#34;dot iota&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot iota -->
<!ENTITY dotj "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotj.gif&#34; ALT=&#34;dot j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot j -->
<!ENTITY dotk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotk.gif&#34; ALT=&#34;dot k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot k -->
<!ENTITY dotkappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotkappa.gif&#34; ALT=&#34;dot kappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot kappa -->
<!ENTITY dotl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotl.gif&#34; ALT=&#34;dot l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot l -->
<!ENTITY dotlambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotlambda.gif&#34; ALT=&#34;dot lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot lambda -->
<!ENTITY dotm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotm.gif&#34; ALT=&#34;dot m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot m -->
<!ENTITY dotmu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotmu.gif&#34; ALT=&#34;dot mu&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot mu -->
<!ENTITY dotn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotn.gif&#34; ALT=&#34;dot n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot n -->
<!ENTITY dotnabla "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotnabla.gif&#34; ALT=&#34;dot nabla&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot nabla -->
<!ENTITY dotnu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotnu.gif&#34; ALT=&#34;dot nu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot nu -->
<!ENTITY doto "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doto.gif&#34; ALT=&#34;dot o&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot o -->
<!ENTITY dotomega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotomega.gif&#34; ALT=&#34;dot omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot omega -->
<!ENTITY dotp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotp.gif&#34; ALT=&#34;dot p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot p -->
<!ENTITY dotpartial "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotpartial.gif&#34; ALT=&#34;dot partial&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot partial -->
<!ENTITY dotphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotphi.gif&#34; ALT=&#34;dot phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot phi -->
<!ENTITY dotpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotpi.gif&#34; ALT=&#34;dot pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot pi -->
<!ENTITY dotplus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotplus.gif&#34; ALT=&#34;dotplus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- plus sign with dot above -->
<!ENTITY dotpsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotpsi.gif&#34; ALT=&#34;dot psi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot psi -->
<!ENTITY dotq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotq.gif&#34; ALT=&#34;dot q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot q -->
<!ENTITY dotr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotr.gif&#34; ALT=&#34;dot r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot r -->
<!ENTITY dotrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotrho.gif&#34; ALT=&#34;dot rho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot rho -->
<!ENTITY dots "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dots.gif&#34; ALT=&#34;dot s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot s -->
<!ENTITY dotsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotsigma.gif&#34; ALT=&#34;dot sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot sigma -->
<!ENTITY dott "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dott.gif&#34; ALT=&#34;dot t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot t -->
<!ENTITY dottau "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dottau.gif&#34; ALT=&#34;dot tau&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot tau -->
<!ENTITY dottheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dottheta.gif&#34; ALT=&#34;dot theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot theta -->
<!ENTITY dotu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotu.gif&#34; ALT=&#34;dot u&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot u -->
<!ENTITY dotupsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotupsilon.gif&#34; ALT=&#34;dot upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot upsilon -->
<!ENTITY dotv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotv.gif&#34; ALT=&#34;dot v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot v -->
<!ENTITY dotvarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvarepsilon.gif&#34; ALT=&#34;dot varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot varepsilon -->
<!ENTITY dotvarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvarphi.gif&#34; ALT=&#34;dot varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot varphi -->
<!ENTITY dotvarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvarpi.gif&#34; ALT=&#34;dot varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot varpi -->
<!ENTITY dotvarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvarrho.gif&#34; ALT=&#34;dot varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot varrho -->
<!ENTITY dotvarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvarsigma.gif&#34; ALT=&#34;dot varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot varsigma -->
<!ENTITY dotvartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotvartheta.gif&#34; ALT=&#34;dot vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot vartheta -->
<!ENTITY dotw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotw.gif&#34; ALT=&#34;dot w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot w -->
<!ENTITY dotx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotx.gif&#34; ALT=&#34;dot x&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dot x -->
<!ENTITY dotxi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotxi.gif&#34; ALT=&#34;dot xi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot xi -->
<!ENTITY doty "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doty.gif&#34; ALT=&#34;dot y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot y -->
<!ENTITY dotz "&#x017C;">	<!-- dot z -->
<!ENTITY dotzeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dotzeta.gif&#34; ALT=&#34;dot zeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dot zeta -->
<!ENTITY doublebarwedge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doublebarwedge.gif&#34; ALT=&#34;doublebarwedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- perspective -->
<!ENTITY doublecap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doublecap.gif&#34; ALT=&#34;doublecap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- double intersection -->
<!ENTITY doublecup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/doublecup.gif&#34; ALT=&#34;doublecup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- double union -->
<!ENTITY downarrow "&#x2193;">	<!-- down arrow -->
<!ENTITY downdownarrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/downdownarrows.gif&#34; ALT=&#34;downdownarrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down arrow pair -->
<!ENTITY downharpoonleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/downharpoonleft.gif&#34; ALT=&#34;downharpoonleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down harpoon left head -->
<!ENTITY downharpoonright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/downharpoonright.gif&#34; ALT=&#34;downharpoonright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down harpoon right head -->
<!ENTITY drarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/drarr.gif&#34; ALT=&#34;drarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- SE pointing arrow (now searr) -->
<!ENTITY drcorn "&#x231F;">	<!-- lower right corner -->
<!ENTITY drcrop "&#x230C;">	<!-- downward right crop mark -->
<!ENTITY dscy "&#x0455;">	<!-- CYRILLIC SMALL LETTER DZE -->
<!ENTITY dstrok "&#x0111;">	<!-- LATIN SMALL LETTER D WITH STROKE -->
<!ENTITY dtri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dtri.gif&#34; ALT=&#34;dtri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down triangle, open -->
<!ENTITY dtrif "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/dtrif.gif&#34; ALT=&#34;dtrif&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dn tri, filled -->
<!ENTITY dzcy "&#x045F;">	<!-- CYRILLIC SMALL LETTER DZHE -->
<!ENTITY eDot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/eDot.gif&#34; ALT=&#34;eDot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- eq, even dots -->
<!ENTITY eacgr "&#x03AD;">	<!-- GREEK SMALL LETTER EPSILON WITH TONOS -->
<!ENTITY eacute "&#x00E9;">	<!-- LATIN SMALL LETTER E WITH ACUTE -->
<!ENTITY earth "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/oplus.gif&#34; ALT=&#34;earth&#34; ALIGN=&#34;MIDDLE&#34; /&#62;">	<!-- Earth symbol -->
<!ENTITY ebreve "&#x0115;">	<!-- breve e -->
<!ENTITY ecaron "&#x011B;">	<!-- LATIN SMALL LETTER E WITH CARON -->
<!ENTITY ecedil "&#x0229;">	<!-- e cedilla -->
<!ENTITY echeck "&#x011B;">	<!-- check e -->
<!ENTITY ecir "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ecir.gif&#34; ALT=&#34;ecir&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- circle on equals sign -->
<!ENTITY ecirc "&#x00EA;">	<!-- LATIN SMALL LETTER E WITH CIRCUMFLEX -->
<!ENTITY ecolon "&#x2255;">	<!-- equals, colon -->
<!ENTITY ecy "&#x044D;">	<!-- CYRILLIC SMALL LETTER E -->
<!ENTITY edot "&#x0117;">	<!-- LATIN SMALL LETTER E WITH DOT ABOVE -->
<!ENTITY eeacgr "&#x03AE;">	<!-- GREEK SMALL LETTER ETA WITH TONOS -->
<!ENTITY eegr "&#x03B7;">	<!-- GREEK SMALL LETTER ETA -->
<!ENTITY eexp "e">	<!-- Upright &#34;e&#34; for exponential e -->
<!ENTITY efDot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/efDot.gif&#34; ALT=&#34;efDot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- eq, falling dots -->
<!ENTITY egr "&#x03B5;">
<!ENTITY egrave "&#x00E8;">	<!-- LATIN SMALL LETTER E WITH GRAVE -->
<!ENTITY egs "&#x2A96;">	<!-- equal-or-gtr, slanted -->
<!ENTITY ell "&#x2113;">	<!-- SCRIPT SMALL L -->
<!ENTITY els "&#x2A95;">	<!-- eq-or-less, slanted -->
<!ENTITY emacr "&#x0113;">	<!-- LATIN SMALL LETTER E WITH MACRON -->
<!ENTITY emdash "&#x2014;">	<!-- em dash -->
<!ENTITY empty "&#x2205;">	<!-- zero, slash -->
<!ENTITY emptyset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/emptyset.gif&#34; ALT=&#34;emptyset&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Empty set -->
<!ENTITY emsp "&#x2003;">	<!-- em space -->
<!ENTITY emsp13 "&#x2004;">	<!-- 1/3-em space -->
<!ENTITY emsp14 "&#x2005;">	<!-- 1/4-em space -->
<!ENTITY endash "&#x2013;">	<!-- en dash -->
<!ENTITY eng "&#x014B;">	<!-- LATIN SMALL LETTER ENG -->
<!ENTITY ensp "&#x2002;">	<!-- en space (1/2-em) -->
<!ENTITY eogon "&#x0119;">	<!-- LATIN SMALL LETTER E WITH OGONEK -->
<!ENTITY epsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/epsi.gif&#34; ALT=&#34;epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small epsilon, Greek. MathML has x03B4 -->
<!ENTITY epsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/epsilon.gif&#34; ALT=&#34;epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- straight epsilon -->
<!ENTITY epsis "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/epsi.gif&#34; ALT=&#34;epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- . not in MathML -->
<!ENTITY epsiv "&#x03B5;">	<!-- varepsilon -->
<!ENTITY eqcirc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/eqcirc.gif&#34; ALT=&#34;eqcirc&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equals with circle inside -->
<!ENTITY eqslantgtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/eqslantgtr.gif&#34; ALT=&#34;eqslantgtr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gtr than or slant equal above -->
<!ENTITY eqslantless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/eqslantless.gif&#34; ALT=&#34;eqslantless&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than or slant equal above -->
<!ENTITY equal " = ">	<!-- equal sign -->
<!ENTITY equals " = ">	<!-- equals sign -->
<!ENTITY equiv "&#x2261;">	<!-- identical with -->
<!ENTITY erDot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/erDot.gif&#34; ALT=&#34;erDot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- eq, rising dots -->
<!ENTITY esdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/esdot.gif&#34; ALT=&#34;esdot&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- equal, similar -->
<!ENTITY eta "&#x03B7;">	<!-- small eta, Greek -->
<!ENTITY eth "&#x00F0;">	<!-- LATIN SMALL LETTER ETH -->
<!ENTITY euml "&#x00EB;">	<!-- LATIN SMALL LETTER E WITH DIAERESIS -->
<!ENTITY excl "!">	<!-- exclamation mark -->
<!ENTITY exist "&#x2203;">	<!-- at least on exists -->
<!ENTITY exists "&#x2203;">	<!-- There exists -->
<!ENTITY exp " exp ">
<!ENTITY fallingdotseq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fallingdotseq.gif&#34; ALT=&#34;fallingdotseq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- equal with dot NW and SE -->
<!ENTITY farcm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/farcm.gif&#34; ALT=&#34;farcm&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional arc minute (arcmin above dec point) -->
<!ENTITY farcs "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/farcs.gif&#34; ALT=&#34;farcs&#34; ALIGN=&#34;BOTTOM&#34; /&#62;">	<!-- Fractional arc second (arcsec above dec point) -->
<!ENTITY fbreve "f&#x0306;">	<!-- breve f -->
<!ENTITY fcedil "f&#x0327;">	<!-- f cedilla -->
<!ENTITY fcheck "f&#x030C;">	<!-- check f -->
<!ENTITY fcy "&#x0444;">	<!-- CYRILLIC SMALL LETTER EF -->
<!ENTITY fd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fd.gif&#34; ALT=&#34;fd&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional day (d over dot) -->
<!ENTITY fdg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fdg.gif&#34; ALT=&#34;fdg&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional degrees (degree symbol over dot) -->
<!ENTITY female "&#x2640;">	<!-- female symbol -->
<!ENTITY ffilig "&#xFB03;">	<!-- small ffi ligature -->
<!ENTITY fflig "&#xFB00;">	<!-- small ff ligature -->
<!ENTITY ffllig "&#xFB04;">	<!-- small ffl ligature -->
<!ENTITY fh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fh.gif&#34; ALT=&#34;fh&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional hour (h over dot) -->
<!ENTITY filig "&#xFB01;">	<!-- small fi ligature -->
<!ENTITY finalform ", in final form ">
<!ENTITY fivehalves "5&#x2044;2">	<!-- 5/2 -->
<!ENTITY flat "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/flat.gif&#34; ALT=&#34;flat&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- musical flat -->
<!ENTITY fllig "&#xFB02;">	<!-- small fl ligature -->
<!ENTITY fm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fm.gif&#34; ALT=&#34;fm&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional minute (m over dot) -->
<!ENTITY fnof "&#x0192;">	<!-- function of (italic small f) -->
<!ENTITY forall "&#x2200;">	<!-- for all -->
<!ENTITY fork "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fork.gif&#34; ALT=&#34;fork&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- pitchfork -->
<!ENTITY fp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fp.gif&#34; ALT=&#34;fp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional period (P over dot) -->
<!ENTITY frac12 "&#x00BD;">	<!-- fraction one-half -->
<!ENTITY frac13 "&#x2153;">	<!-- fraction one-third -->
<!ENTITY frac14 "&#x00BC;">	<!-- fraction one-quarter -->
<!ENTITY frac15 "&#x2155;">	<!-- fraction one-fifth -->
<!ENTITY frac16 "&#x2159;">	<!-- fraction one-sixth -->
<!ENTITY frac18 "&#x215B;">	<!-- fraction one-eighth -->
<!ENTITY frac23 "&#x2154;">	<!-- fraction two-thirds -->
<!ENTITY frac25 "&#x2156;">	<!-- fraction two-fifths -->
<!ENTITY frac34 "&#x00BE;">	<!-- fraction three-quarters -->
<!ENTITY frac35 "&#x2157;">	<!-- fraction three-fifths -->
<!ENTITY frac38 "&#x215C;">	<!-- fraction three-eighths -->
<!ENTITY frac45 "&#x2158;">	<!-- fraction four-fifths -->
<!ENTITY frac56 "&#x215A;">	<!-- fraction five-sixths -->
<!ENTITY frac58 "&#x215D;">	<!-- fraction five-eighths -->
<!ENTITY frac78 "&#x215E;">	<!-- fraction seven-eighths -->
<!ENTITY frakA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakA.gif&#34; ALT=&#34;fraktur A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur A -->
<!ENTITY frakB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakB.gif&#34; ALT=&#34;fraktur B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur B -->
<!ENTITY frakC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakC.gif&#34; ALT=&#34;fraktur C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur C -->
<!ENTITY frakD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakD.gif&#34; ALT=&#34;fraktur D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur D -->
<!ENTITY frakE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakE.gif&#34; ALT=&#34;fraktur E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur E -->
<!ENTITY frakF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakF.gif&#34; ALT=&#34;fraktur F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur F -->
<!ENTITY frakG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakG.gif&#34; ALT=&#34;fraktur G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur G -->
<!ENTITY frakH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakH.gif&#34; ALT=&#34;fraktur H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur H -->
<!ENTITY frakI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakI.gif&#34; ALT=&#34;fraktur I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur I -->
<!ENTITY frakJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakJ.gif&#34; ALT=&#34;fraktur J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur J -->
<!ENTITY frakK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakK.gif&#34; ALT=&#34;fraktur K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur K -->
<!ENTITY frakL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakL.gif&#34; ALT=&#34;fraktur L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur L -->
<!ENTITY frakM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakM.gif&#34; ALT=&#34;fraktur M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur M -->
<!ENTITY frakN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakN.gif&#34; ALT=&#34;fraktur N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur N -->
<!ENTITY frakO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakO.gif&#34; ALT=&#34;fraktur O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur O -->
<!ENTITY frakP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakP.gif&#34; ALT=&#34;fraktur P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur P -->
<!ENTITY frakQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakQ.gif&#34; ALT=&#34;fraktur Q&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur Q -->
<!ENTITY frakR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakR.gif&#34; ALT=&#34;fraktur R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur R -->
<!ENTITY frakS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakS.gif&#34; ALT=&#34;fraktur S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur S -->
<!ENTITY frakT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakT.gif&#34; ALT=&#34;fraktur T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur T -->
<!ENTITY frakU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakU.gif&#34; ALT=&#34;fraktur U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur U -->
<!ENTITY frakV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakV.gif&#34; ALT=&#34;fraktur V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur V -->
<!ENTITY frakW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakW.gif&#34; ALT=&#34;fraktur W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur W -->
<!ENTITY frakX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakX.gif&#34; ALT=&#34;fraktur X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur X -->
<!ENTITY frakY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakY.gif&#34; ALT=&#34;fraktur Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur Y -->
<!ENTITY frakZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakZ.gif&#34; ALT=&#34;fraktur Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur Z -->
<!ENTITY fraka "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fraka.gif&#34; ALT=&#34;fraktur a&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur a -->
<!ENTITY frakb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakb.gif&#34; ALT=&#34;fraktur b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur b -->
<!ENTITY frakc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakc.gif&#34; ALT=&#34;fraktur c&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur c -->
<!ENTITY frakd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakd.gif&#34; ALT=&#34;fraktur d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur d -->
<!ENTITY frake "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frake.gif&#34; ALT=&#34;fraktur e&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur e -->
<!ENTITY frakf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakf.gif&#34; ALT=&#34;fraktur f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur f -->
<!ENTITY frakg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakg.gif&#34; ALT=&#34;fraktur g&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur g -->
<!ENTITY frakh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakh.gif&#34; ALT=&#34;fraktur h&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur h -->
<!ENTITY fraki "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fraki.gif&#34; ALT=&#34;fraktur i&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur i -->
<!ENTITY frakj "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakj.gif&#34; ALT=&#34;fraktur j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur j -->
<!ENTITY frakk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakk.gif&#34; ALT=&#34;fraktur k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur k -->
<!ENTITY frakl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakl.gif&#34; ALT=&#34;fraktur l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur l -->
<!ENTITY frakm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakm.gif&#34; ALT=&#34;fraktur m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur m -->
<!ENTITY frakn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakn.gif&#34; ALT=&#34;fraktur n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur n -->
<!ENTITY frako "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frako.gif&#34; ALT=&#34;fraktur o&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur o -->
<!ENTITY frakp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakp.gif&#34; ALT=&#34;fraktur p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur p -->
<!ENTITY frakq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakq.gif&#34; ALT=&#34;fraktur q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur q -->
<!ENTITY frakr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakr.gif&#34; ALT=&#34;fraktur r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur r -->
<!ENTITY fraks "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fraks.gif&#34; ALT=&#34;fraktur s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur s -->
<!ENTITY frakt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakt.gif&#34; ALT=&#34;fraktur t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur t -->
<!ENTITY fraku "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fraku.gif&#34; ALT=&#34;fraktur u&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur u -->
<!ENTITY frakv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakv.gif&#34; ALT=&#34;fraktur v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur v -->
<!ENTITY frakw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakw.gif&#34; ALT=&#34;fraktur w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fraktur w -->
<!ENTITY frakx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakx.gif&#34; ALT=&#34;fraktur x&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur x -->
<!ENTITY fraky "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fraky.gif&#34; ALT=&#34;fraktur y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur y -->
<!ENTITY frakz "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frakz.gif&#34; ALT=&#34;fraktur z&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Fraktur z -->
<!ENTITY frown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/frown.gif&#34; ALT=&#34;frown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down curve -->
<!ENTITY fs "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/fs.gif&#34; ALT=&#34;fs&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Fractional second (s over dot) -->
<!ENTITY gE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gE.gif&#34; ALT=&#34;gE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- greater, double equals -->
<!ENTITY gEl "&#x2A8C;">	<!-- gt, dbl equals, less -->
<!ENTITY gacute "&#x01F5;">	<!-- LATIN SMALL LETTER G WITH ACUTE -->
<!ENTITY gamma "&#x03B3;">	<!-- small gamma, Greek -->
<!ENTITY gammad "&#x03DC;">	<!-- digamma. MathML has x03DD -->
<!ENTITY gap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gap.gif&#34; ALT=&#34;gap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- greater, approximate -->
<!ENTITY gbreve "&#x011F;">	<!-- LATIN SMALL LETTER G WITH BREVE -->
<!ENTITY gcd " gcd ">
<!ENTITY gcedil "&#x0123;">	<!-- g cedilla -->
<!ENTITY gcheck "&#x01E7;">	<!-- check g -->
<!ENTITY gcirc "&#x011D;">	<!-- LATIN SMALL LETTER G WITH CIRCUMFLEX -->
<!ENTITY gcy "&#x0433;">	<!-- CYRILLIC SMALL LETTER GHE -->
<!ENTITY gdot "&#x0121;">	<!-- LATIN SMALL LETTER G WITH DOT ABOVE -->
<!ENTITY ge "&#x2265;">	<!-- greater-than-or-equal -->
<!ENTITY gel "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gel.gif&#34; ALT=&#34;gel&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- greater, equals, less -->
<!ENTITY geq "&#x2265;">	<!-- greater than or slanted equal -->
<!ENTITY geqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/geqq.gif&#34; ALT=&#34;geqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gtr than over equal -->
<!ENTITY geqslant "&#x2265;">	<!-- gtr than or slant equal -->
<!ENTITY ges "&#x2265;">	<!-- gt-or- equal, slanted -->
<!ENTITY gets "&#x2190;">	<!-- left arrow -->
<!ENTITY gg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gg.gif&#34; ALT=&#34;gg&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- double greater than -->
<!ENTITY ggg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ggg.gif&#34; ALT=&#34;ggg&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- triple gtr than -->
<!ENTITY gggtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gggtr.gif&#34; ALT=&#34;gggtr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- triple gtr than -->
<!ENTITY ggr "&#x03B3;">	<!-- GREEK SMALL LETTER GAMMA -->
<!ENTITY gimel "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gimel.gif&#34; ALT=&#34;gimel&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gimel, Hebrew -->
<!ENTITY gjcy "&#x0453;">	<!-- CYRILLIC SMALL LETTER GJE -->
<!ENTITY gl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gl.gif&#34; ALT=&#34;gl&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- greater, less -->
<!ENTITY gnE "&#x2269;">	<!-- greater, not dbl equals -->
<!ENTITY gnap "&#x2A8A;">	<!-- greater, not approximate -->
<!ENTITY gnapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gnapprox.gif&#34; ALT=&#34;gnapprox&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr than, not approximate -->
<!ENTITY gne "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gne.gif&#34; ALT=&#34;gne&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- greater, not equals -->
<!ENTITY gneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gneq.gif&#34; ALT=&#34;gneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gtr than over single not equal -->
<!ENTITY gneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gneqq.gif&#34; ALT=&#34;gneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gtr than over dbl not equal -->
<!ENTITY gnsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gnsim.gif&#34; ALT=&#34;gnsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- greater, not similar -->
<!ENTITY grave "&#x0300;">	<!-- grave accent. MathML: x0060 -->
<!ENTITY graveA "&#x1D434;&#x0300;">	<!-- italic A grave -->
<!ENTITY graveE "&#x1D438;&#x0300;">	<!-- italic E grave -->
<!ENTITY graveI "&#x1D43C;&#x0300;">	<!-- italic I grave -->
<!ENTITY graveO "&#x1D442;&#x0300;">	<!-- italic O grave -->
<!ENTITY graveU "&#x1D448;&#x0300;">	<!-- italic U grave -->
<!ENTITY gravea "&#x1D44E;&#x0300;">	<!-- italic a grave -->
<!ENTITY gravee "&#x1D452;&#x0300;">	<!-- italic e grave -->
<!ENTITY gravei "&#x1D456;&#x0300;">	<!-- italic i grave -->
<!ENTITY graveo "&#x1D45C;&#x0300;">	<!-- italic o grave -->
<!ENTITY graveu "&#x1D462;&#x0300;">	<!-- italic u grave -->
<!ENTITY gsdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gsdot.gif&#34; ALT=&#34;gsdot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- . not in MathML -->
<!ENTITY gsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gsim.gif&#34; ALT=&#34;gsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- greater, similar -->
<!ENTITY gt "&#x003E;">	<!-- greater-than sign -->
<!ENTITY gtrapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtrapprox.gif&#34; ALT=&#34;gtrapprox&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr then or approximate -->
<!ENTITY gtrdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtrdot.gif&#34; ALT=&#34;gtrdot&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr than with dot -->
<!ENTITY gtreqless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtreqless.gif&#34; ALT=&#34;gtreqless&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr than equal or less than -->
<!ENTITY gtreqqless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtreqqless.gif&#34; ALT=&#34;gtreqqless&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr dbl equal or less than -->
<!ENTITY gtrless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtrless.gif&#34; ALT=&#34;gtrless&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr than or less than -->
<!ENTITY gtrsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gtrsim.gif&#34; ALT=&#34;gtrsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- gtr than or equivalent -->
<!ENTITY gvertneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/gvertneqq.gif&#34; ALT=&#34;gvertneqq&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- gtr than over dbl v not equal -->
<!ENTITY gvnE "&#x2269;">	<!-- gt, vert, not dbl eq. MathML: x2269xfe00 -->
<!ENTITY hArr "&#x21D4;">	<!-- l&r dbl arrow -->
<!ENTITY hairsp "&#x200A;">	<!-- hair space -->
<!ENTITY half "&#x00BD;">	<!-- fraction one half -->
<!ENTITY hamilt "&#x210B;">	<!-- Hamiltonian (script capital H) -->
<!ENTITY hardcy "&#x044A;">	<!-- CYRILLIC SMALL LETTER HARD SIGN -->
<!ENTITY harr "&#x2194;">	<!-- l&r arrow -->
<!ENTITY harrw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/harrw.gif&#34; ALT=&#34;harrw&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- l&r arr-wavy -->
<!ENTITY hash "#">	<!-- hash -->
<!ENTITY hat0 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat0.gif&#34; ALT=&#34;hat 0&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 0 -->
<!ENTITY hat1 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat1.gif&#34; ALT=&#34;hat 1&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 1 -->
<!ENTITY hat2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat2.gif&#34; ALT=&#34;hat 2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 2 -->
<!ENTITY hat3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat3.gif&#34; ALT=&#34;hat 3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 3 -->
<!ENTITY hat4 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat4.gif&#34; ALT=&#34;hat 4&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 4 -->
<!ENTITY hat5 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat5.gif&#34; ALT=&#34;hat 5&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 5 -->
<!ENTITY hat6 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat6.gif&#34; ALT=&#34;hat 6&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 6 -->
<!ENTITY hat7 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat7.gif&#34; ALT=&#34;hat 7&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 7 -->
<!ENTITY hat8 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat8.gif&#34; ALT=&#34;hat 8&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 8 -->
<!ENTITY hat9 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hat9.gif&#34; ALT=&#34;hat 9&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat 9 -->
<!ENTITY hatA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatA.gif&#34; ALT=&#34;hat A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat A -->
<!ENTITY hatB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatB.gif&#34; ALT=&#34;hat B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat B -->
<!ENTITY hatC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatC.gif&#34; ALT=&#34;hat C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat C -->
<!ENTITY hatD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatD.gif&#34; ALT=&#34;hat D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat D -->
<!ENTITY hatDelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatDelta.gif&#34; ALT=&#34;hat Delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Delta -->
<!ENTITY hatE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatE.gif&#34; ALT=&#34;hat E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat E -->
<!ENTITY hatF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatF.gif&#34; ALT=&#34;hat F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat F -->
<!ENTITY hatG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatG.gif&#34; ALT=&#34;hat G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat G -->
<!ENTITY hatGamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatGamma.gif&#34; ALT=&#34;hat Gamma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Gamma -->
<!ENTITY hatH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatH.gif&#34; ALT=&#34;hat H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat H -->
<!ENTITY hatI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatI.gif&#34; ALT=&#34;hat I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat I -->
<!ENTITY hatJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatJ.gif&#34; ALT=&#34;hat J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat J -->
<!ENTITY hatK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatK.gif&#34; ALT=&#34;hat K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat K -->
<!ENTITY hatL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatL.gif&#34; ALT=&#34;hat L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat L -->
<!ENTITY hatM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatM.gif&#34; ALT=&#34;hat M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat M -->
<!ENTITY hatN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatN.gif&#34; ALT=&#34;hat N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat N -->
<!ENTITY hatO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatO.gif&#34; ALT=&#34;hat O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat O -->
<!ENTITY hatOmega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatOmega.gif&#34; ALT=&#34;hat Omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Omega -->
<!ENTITY hatP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatP.gif&#34; ALT=&#34;hat P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat P -->
<!ENTITY hatPhi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatPhi.gif&#34; ALT=&#34;hat Phi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Phi -->
<!ENTITY hatPi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatPi.gif&#34; ALT=&#34;hat Pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Pi -->
<!ENTITY hatPsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatPsi.gif&#34; ALT=&#34;hat Psi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Psi -->
<!ENTITY hatQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatQ.gif&#34; ALT=&#34;hat Q&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Q -->
<!ENTITY hatR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatR.gif&#34; ALT=&#34;hat R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat R -->
<!ENTITY hatS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatS.gif&#34; ALT=&#34;hat S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat S -->
<!ENTITY hatSigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatSigma.gif&#34; ALT=&#34;hat Sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Sigma -->
<!ENTITY hatT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatT.gif&#34; ALT=&#34;hat T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat T -->
<!ENTITY hatTheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatTheta.gif&#34; ALT=&#34;hat Theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Theta -->
<!ENTITY hatU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatU.gif&#34; ALT=&#34;hat U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat U -->
<!ENTITY hatUpsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatUpsilon.gif&#34; ALT=&#34;hat Upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Upsilon -->
<!ENTITY hatV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatV.gif&#34; ALT=&#34;hat V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat V -->
<!ENTITY hatW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatW.gif&#34; ALT=&#34;hat W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat W -->
<!ENTITY hatX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatX.gif&#34; ALT=&#34;hat X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat X -->
<!ENTITY hatXi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatXi.gif&#34; ALT=&#34;hat Xi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Xi -->
<!ENTITY hatY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatY.gif&#34; ALT=&#34;hat Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Y -->
<!ENTITY hatZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatZ.gif&#34; ALT=&#34;hat Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat Z -->
<!ENTITY hata "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hata.gif&#34; ALT=&#34;hat a&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat a -->
<!ENTITY hatalpha "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatalpha.gif&#34; ALT=&#34;hat alpha&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat alpha -->
<!ENTITY hatb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatb.gif&#34; ALT=&#34;hat b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat b -->
<!ENTITY hatbeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatbeta.gif&#34; ALT=&#34;hat beta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat beta -->
<!ENTITY hatc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatc.gif&#34; ALT=&#34;hat c&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat c -->
<!ENTITY hatchi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatchi.gif&#34; ALT=&#34;hat chi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat chi -->
<!ENTITY hatd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatd.gif&#34; ALT=&#34;hat d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat d -->
<!ENTITY hatdelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatdelta.gif&#34; ALT=&#34;hat delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat delta -->
<!ENTITY hate "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hate.gif&#34; ALT=&#34;hat e&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat e -->
<!ENTITY hatell "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatell.gif&#34; ALT=&#34;hat ell&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- script l with hat -->
<!ENTITY hatepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatepsilon.gif&#34; ALT=&#34;hat epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat epsilon -->
<!ENTITY hateta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hateta.gif&#34; ALT=&#34;hat eta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat eta -->
<!ENTITY hatf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatf.gif&#34; ALT=&#34;hat f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat f -->
<!ENTITY hatg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatg.gif&#34; ALT=&#34;hat g&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat g -->
<!ENTITY hatgamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatgamma.gif&#34; ALT=&#34;hat gamma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat gamma -->
<!ENTITY hath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hath.gif&#34; ALT=&#34;hat h&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat h -->
<!ENTITY hati "&#x00EE;">	<!-- hat i -->
<!ENTITY hatimath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatimath.gif&#34; ALT=&#34;hat imath&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- dotless i with hat -->
<!ENTITY hatiota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatiota.gif&#34; ALT=&#34;hat iota&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat iota -->
<!ENTITY hatj "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatj.gif&#34; ALT=&#34;hat j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat j -->
<!ENTITY hatjmath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatjmath.gif&#34; ALT=&#34;hat jmath&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- dotless j with hat -->
<!ENTITY hatk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatk.gif&#34; ALT=&#34;hat k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat k -->
<!ENTITY hatkappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatkappa.gif&#34; ALT=&#34;hat kappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat kappa -->
<!ENTITY hatl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatl.gif&#34; ALT=&#34;hat l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat l -->
<!ENTITY hatlambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatlambda.gif&#34; ALT=&#34;hat lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat lambda -->
<!ENTITY hatm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatm.gif&#34; ALT=&#34;hat m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat m -->
<!ENTITY hatmu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatmu.gif&#34; ALT=&#34;hat mu&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat mu -->
<!ENTITY hatn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatn.gif&#34; ALT=&#34;hat n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat n -->
<!ENTITY hatnabla "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatnabla.gif&#34; ALT=&#34;hat nabla&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- nabla with hat -->
<!ENTITY hatnu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatnu.gif&#34; ALT=&#34;hat nu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat nu -->
<!ENTITY hato "&#x00F4;">	<!-- hat o -->
<!ENTITY hatomega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatomega.gif&#34; ALT=&#34;hat omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat omega -->
<!ENTITY hatp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatp.gif&#34; ALT=&#34;hat p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat p -->
<!ENTITY hatpartial "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatpartial.gif&#34; ALT=&#34;hat partial&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- partial d. with hat -->
<!ENTITY hatphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatphi.gif&#34; ALT=&#34;hat phi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat phi -->
<!ENTITY hatpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatpi.gif&#34; ALT=&#34;hat pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat pi -->
<!ENTITY hatpsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatpsi.gif&#34; ALT=&#34;hat psi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat psi -->
<!ENTITY hatq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatq.gif&#34; ALT=&#34;hat q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat q -->
<!ENTITY hatr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatr.gif&#34; ALT=&#34;hat r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat r -->
<!ENTITY hatrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatrho.gif&#34; ALT=&#34;hat rho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat rho -->
<!ENTITY hats "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hats.gif&#34; ALT=&#34;hat s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat s -->
<!ENTITY hatsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatsigma.gif&#34; ALT=&#34;hat sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat sigma -->
<!ENTITY hatt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatt.gif&#34; ALT=&#34;hat t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat t -->
<!ENTITY hattau "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hattau.gif&#34; ALT=&#34;hat tau&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat tau -->
<!ENTITY hattheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hattheta.gif&#34; ALT=&#34;hat theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat theta -->
<!ENTITY hatu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatu.gif&#34; ALT=&#34;hat u&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat u -->
<!ENTITY hatupsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatupsilon.gif&#34; ALT=&#34;hat upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat upsilon -->
<!ENTITY hatv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatv.gif&#34; ALT=&#34;hat v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat v -->
<!ENTITY hatvarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvarepsilon.gif&#34; ALT=&#34;hat varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat varepsilon -->
<!ENTITY hatvarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvarphi.gif&#34; ALT=&#34;hat varphi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat varphi -->
<!ENTITY hatvarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvarpi.gif&#34; ALT=&#34;hat varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat varpi -->
<!ENTITY hatvarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvarrho.gif&#34; ALT=&#34;hat varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat varrho -->
<!ENTITY hatvarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvarsigma.gif&#34; ALT=&#34;hat varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat varsigma -->
<!ENTITY hatvartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatvartheta.gif&#34; ALT=&#34;hat vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat vartheta -->
<!ENTITY hatw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatw.gif&#34; ALT=&#34;hat w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat w -->
<!ENTITY hatx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatx.gif&#34; ALT=&#34;hat x&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat x -->
<!ENTITY hatxi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatxi.gif&#34; ALT=&#34;hat xi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat xi -->
<!ENTITY haty "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/haty.gif&#34; ALT=&#34;hat y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat y -->
<!ENTITY hatz "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatz.gif&#34; ALT=&#34;hat z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hat z -->
<!ENTITY hatzeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hatzeta.gif&#34; ALT=&#34;hat zeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- hat zeta -->
<!ENTITY hbar "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hbar.gif&#34; ALT=&#34;hbar&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Planck's constant over 2 pi -->
<!ENTITY hbreve "h&#x0306;">	<!-- breve h -->
<!ENTITY hcedil "&#x1E29;">	<!-- h cedilla -->
<!ENTITY hcheck "&#x021F;">	<!-- check h -->
<!ENTITY hcirc "&#x0125;">	<!-- LATIN SMALL LETTER H WITH CIRCUMFLEX -->
<!ENTITY hearts "&#x2665;">	<!-- heart suit symbol -->
<!ENTITY heartsuit "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/heartsuit.gif&#34; ALT=&#34;heartsuit&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- White diamond suit -->
<!ENTITY hellip "...">	<!-- ellipsis (horizontal) -->
<!ENTITY hom " hom ">
<!ENTITY hookleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hookleftarrow.gif&#34; ALT=&#34;hookleftarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left hooked arrow -->
<!ENTITY hookrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hookrightarrow.gif&#34; ALT=&#34;hookrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right hooked arrow -->
<!ENTITY horbar "&#x2015;">	<!-- horizontal bar -->
<!ENTITY hslash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/hslash.gif&#34; ALT=&#34;hslash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- planck constant over 2 pi -->
<!ENTITY hstrok "&#x0127;">	<!-- LATIN SMALL LETTER H WITH STROKE -->
<!ENTITY hybull "&#x2043;">	<!-- rectangle, filled (hyphen bullet) -->
<!ENTITY hyphen "-">	<!-- hyphen. MathML has x2010 -->
<!ENTITY iacgr "&#x03AF;">	<!-- GREEK SMALL LETTER IOTA WITH TONOS -->
<!ENTITY iacute "&#x00ED;">	<!-- LATIN SMALL LETTER I WITH ACUTE -->
<!ENTITY ibreve "&#x012D;">	<!-- breve i -->
<!ENTITY icedil "i&#x0327;">	<!-- i cedilla -->
<!ENTITY icheck "&#x01D0;">	<!-- check i -->
<!ENTITY icirc "&#x00EE;">	<!-- LATIN SMALL LETTER I WITH CIRCUMFLEX -->
<!ENTITY icy "&#x0438;">	<!-- CYRILLIC SMALL LETTER I -->
<!ENTITY idiagr "&#x0390;">	<!-- GREEK SMALL LETTER IOTA WITH DIALYTIKA AND TONOS -->
<!ENTITY idigr "&#x03CA;">	<!-- GREEK SMALL LETTER IOTA WITH DIALYTIKA -->
<!ENTITY iecy "&#x0435;">	<!-- CYRILLIC SMALL LETTER IE -->
<!ENTITY iexcl "&#x00A1;">	<!-- inverted exclamation mark -->
<!ENTITY iff "&#x27FA;">	<!-- if and only if. MathML has x21D4 -->
<!ENTITY igr "&#x03B9;">	<!-- GREEK SMALL LETTER IOTA -->
<!ENTITY igrave "&#x00EC;">	<!-- LATIN SMALL LETTER I WITH GRAVE -->
<!ENTITY iimg "i">	<!-- Upright &#34;i&#34; for imaginary i -->
<!ENTITY ijlig "&#x0133;">	<!-- LATIN SMALL LIGATURE IJ -->
<!ENTITY im "Im">	<!-- Upright &#34;Im&#34; for imaginary -->
<!ENTITY imacr "&#x012B;">	<!-- LATIN SMALL LETTER I WITH MACRON -->
<!ENTITY image "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/image.gif&#34; ALT=&#34;image&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- imaginary -->
<!ENTITY imath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/imath.gif&#34; ALT=&#34;imath&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Dotless i -->
<!ENTITY in "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/in.gif&#34; ALT=&#34;in&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- element of -->
<!ENTITY incare "&#x2105;">	<!-- in care-of symbol -->
<!ENTITY inf " inf ">
<!ENTITY infin "&#x221E;">	<!-- infinity -->
<!ENTITY infty "&#x221E;">	<!-- Infinity -->
<!ENTITY inodot "&#x0131;">
<!ENTITY int "&#x222B;">	<!-- integral operator -->
<!ENTITY intcal "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/intcal.gif&#34; ALT=&#34;intcal&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- intercal -->
<!ENTITY intercal "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/intercal.gif&#34; ALT=&#34;intercal&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- intercalate -->
<!ENTITY iocy "&#x0451;">	<!-- CYRILLIC SMALL LETTER IO -->
<!ENTITY iogon "&#x012F;">	<!-- LATIN SMALL LETTER I WITH OGONEK -->
<!ENTITY iota "&#x03B9;">	<!-- small iota, Greek -->
<!ENTITY iquest "&#x00BF;">	<!-- inverted question mark -->
<!ENTITY isin "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/in.gif&#34; ALT=&#34;in&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- set membership. MathML has x2208 -->
<!ENTITY itDelta "&#60;i&#62;&#x0394;&#60;/i&#62;">	<!-- italic Delta -->
<!ENTITY itGamma "&#60;i&#62;&#x0393;&#60;/i&#62;">	<!-- italic Gamma -->
<!ENTITY itLambda "&#60;i&#62;&#x039B;&#60;/i&#62;">	<!-- italic Lambda -->
<!ENTITY itOmega "&#60;i&#62;&#x03A9;&#60;/i&#62;">	<!-- italic Omega -->
<!ENTITY itPhi "&#60;i&#62;&#x03A6;&#60;/i&#62;">	<!-- italic Phi -->
<!ENTITY itPi "&#60;i&#62;&#x03A0;&#60;/i&#62;">	<!-- italic Pi -->
<!ENTITY itPsi "&#60;i&#62;&#x03A8;&#60;/i&#62;">	<!-- italic Psi -->
<!ENTITY itSigma "&#60;i&#62;&#x03A3;&#60;/i&#62;">	<!-- italic Sigma -->
<!ENTITY itTheta "&#60;i&#62;&#x0398;&#60;/i&#62;">	<!-- italic Theta -->
<!ENTITY itUpsilon "&#60;i&#62;&#x03A5;&#60;/i&#62;">	<!-- italic Upsilon -->
<!ENTITY itXi "&#60;i&#62;&#x039E;&#60;/i&#62;">	<!-- italic Xi -->
<!ENTITY itilde "&#x0129;">	<!-- LATIN SMALL LETTER I WITH TILDE -->
<!ENTITY iukcy "&#x0456;">	<!-- CYRILLIC SMALL LETTER BYELORUSSIAN-UKRAINIAN I -->
<!ENTITY iuml "&#x00EF;">	<!-- LATIN SMALL LETTER I WITH DIAERESIS -->
<!ENTITY j0 "&#x00B0;">	<!-- J dot (the dot of a j) -->
<!ENTITY jbreve "j&#x0306;">	<!-- breve j -->
<!ENTITY jcedil "j&#x0327;">	<!-- j cedilla -->
<!ENTITY jcheck "&#x01F0;">	<!-- check j -->
<!ENTITY jcirc "&#x0135;">	<!-- LATIN SMALL LETTER J WITH CIRCUMFLEX -->
<!ENTITY jcy "&#x0439;">	<!-- CYRILLIC SMALL LETTER SHORT I -->
<!ENTITY jmath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/jmath.gif&#34; ALT=&#34;jmath&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Dotless j -->
<!ENTITY jsercy "&#x0458;">	<!-- CYRILLIC SMALL LETTER JE -->
<!ENTITY jukcy "&#x0454;">	<!-- CYRILLIC SMALL LETTER UKRAINIAN IE -->
<!ENTITY jupiter "&#x2643;">	<!-- Jupiter symbol -->
<!ENTITY kappa "&#x03BA;">	<!-- small kappa, Greek -->
<!ENTITY kappav "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/kappav.gif&#34; ALT=&#34;kappav&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- varkappa -->
<!ENTITY kbreve "k&#x0306;">	<!-- breve k -->
<!ENTITY kcedil "&#x0137;">	<!-- LATIN SMALL LETTER K WITH CEDILLA -->
<!ENTITY kcheck "&#x01E9;">	<!-- check k -->
<!ENTITY kcy "&#x043A;">	<!-- CYRILLIC SMALL LETTER KA -->
<!ENTITY ker " ker ">
<!ENTITY kgr "&#x03BA;">	<!-- GREEK SMALL LETTER KAPPA -->
<!ENTITY kgreen "&#x0138;">	<!-- LATIN SMALL LETTER KRA -->
<!ENTITY khcy "&#x0445;">	<!-- CYRILLIC SMALL LETTER HA -->
<!ENTITY khgr "&#x03C7;">	<!-- GREEK SMALL LETTER CHI -->
<!ENTITY kjcy "&#x045C;">	<!-- CYRILLIC SMALL LETTER KJE -->
<!ENTITY lAarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lAarr.gif&#34; ALT=&#34;lAarr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left triple arrow -->
<!ENTITY lArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lArr.gif&#34; ALT=&#34;lArr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left arrow, is implied by -->
<!ENTITY lE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lE.gif&#34; ALT=&#34;lE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less, double equals -->
<!ENTITY lEg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lEg.gif&#34; ALT=&#34;lEg&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- less, dbl eq, greater -->
<!ENTITY lacute "&#x013A;">	<!-- LATIN SMALL LETTER L WITH ACUTE -->
<!ENTITY lagran "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/calL.gif&#34; ALT=&#34;Script L&#34; ALIGN=&#34;BOTTOM&#34; /&#62;">	<!-- Lagrangian (script capital L) -->
<!ENTITY lambda "&#x03BB;">	<!-- small lambda, Greek -->
<!ENTITY land "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/land.gif&#34; ALT=&#34;wedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Logical and -->
<!ENTITY lang "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lang.gif&#34; ALT=&#34;lang&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left angle bracket -->
<!ENTITY langle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/langle.gif&#34; ALT=&#34;langle&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left angle bracket -->
<!ENTITY lap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lap.gif&#34; ALT=&#34;lap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less, approximate -->
<!ENTITY laquo "&#x00AB;">	<!-- angle quotation mark, left -->
<!ENTITY larr "&#x2190;">	<!-- leftward arrow -->
<!ENTITY larr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/larr2.gif&#34; ALT=&#34;larr2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- two left arrows (now llarr) -->
<!ENTITY larrhk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/larrhk.gif&#34; ALT=&#34;larrhk&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left arrow hooked -->
<!ENTITY larrlp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/larrlp.gif&#34; ALT=&#34;larrlp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left arrow-looped -->
<!ENTITY larrr "&#x27F5;">
<!ENTITY larrtl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/larrtl.gif&#34; ALT=&#34;larrtl&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left arrow-tailed -->
<!ENTITY lbrace "{">	<!-- left curly brace -->
<!ENTITY lbrack "[">	<!-- left bracket -->
<!ENTITY lbreve "l&#x0306;">	<!-- breve l -->
<!ENTITY lcaron "&#x013E;">	<!-- LATIN SMALL LETTER L WITH CARON -->
<!ENTITY lcedil "&#x013C;">	<!-- LATIN SMALL LETTER L WITH CEDILLA -->
<!ENTITY lceil "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lceil.gif&#34; ALT=&#34;lceil&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left ceiling -->
<!ENTITY lcheck "&#x013E;">	<!-- check l -->
<!ENTITY lchevron "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lchevron.gif&#34; ALT=&#34;lchevron&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left chevron -->
<!ENTITY lcub "{">	<!-- left curly bracket -->
<!ENTITY lcy "&#x043B;">	<!-- CYRILLIC SMALL LETTER EL -->
<!ENTITY ldchevron "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ldchevron.gif&#34; ALT=&#34;ldchevron&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left double chevron -->
<!ENTITY ldot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ldot.gif&#34; ALT=&#34;ldot&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- . not in MathML -->
<!ENTITY ldots "...">	<!-- ellipsis -->
<!ENTITY ldquo "&#34;">	<!-- left double quote -->
<!ENTITY ldquor "&#34;">	<!-- rising dbl quote, left (low) -->
<!ENTITY le "&#x2264;">	<!-- less-then-or-equal -->
<!ENTITY leftarrow "&#x2190;">	<!-- left arrow -->
<!ENTITY leftarrowtail "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftarrowtail.gif&#34; ALT=&#34;leftarrowtail&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- left tailed arrow -->
<!ENTITY leftharpoondown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftharpoondown.gif&#34; ALT=&#34;leftharpoondown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left harpoon down head -->
<!ENTITY leftharpoonup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftharpoonup.gif&#34; ALT=&#34;leftharpoonup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left harpoon up head -->
<!ENTITY leftleftarrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftleftarrows.gif&#34; ALT=&#34;leftleftarrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left arrow pair -->
<!ENTITY leftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftrightarrow.gif&#34; ALT=&#34;leftrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left-right arrow -->
<!ENTITY leftrightarrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftrightarrows.gif&#34; ALT=&#34;leftrightarrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left over right arrow -->
<!ENTITY leftrightharpoons "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftrightharpoons.gif&#34; ALT=&#34;leftrightharpoons&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left over right harpoon -->
<!ENTITY leftrightsquigarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftrightsquigarrow.gif&#34; ALT=&#34;leftrightsquigarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left-right squiggle arr -->
<!ENTITY leftthreetimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leftthreetimes.gif&#34; ALT=&#34;leftthreetimes&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left semidirect product -->
<!ENTITY leg "&#x22DA;">	<!-- less, eq, greater -->
<!ENTITY leq "&#x2264;">	<!-- less than or slanted equal -->
<!ENTITY leqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/leqq.gif&#34; ALT=&#34;leqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than over equal -->
<!ENTITY leqslant "&#x2264;">	<!-- less than or slant equal -->
<!ENTITY les "&#x2264;">	<!-- less-than-or-eq, slant -->
<!ENTITY lessapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lessapprox.gif&#34; ALT=&#34;lessapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than or approximate -->
<!ENTITY lessdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lessdot.gif&#34; ALT=&#34;lessdot&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than with dot -->
<!ENTITY lesseqgtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lesseqgtr.gif&#34; ALT=&#34;lesseqgtr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- less than equal or greater than -->
<!ENTITY lesseqqgtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lesseqqgtr.gif&#34; ALT=&#34;lesseqqgtr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- less dbl equal or greater -->
<!ENTITY lessgtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lessgtr.gif&#34; ALT=&#34;lessgtr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- less than or greater than -->
<!ENTITY lesssim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lesssim.gif&#34; ALT=&#34;lesssim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than or equivalent -->
<!ENTITY lfloor "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lfloor.gif&#34; ALT=&#34;lfloor&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left floor -->
<!ENTITY lg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lg.gif&#34; ALT=&#34;lg&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- less, greater -->
<!ENTITY lgr "&#x03BB;">	<!-- GREEK SMALL LETTER LAMDA -->
<!ENTITY lhard "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lhard.gif&#34; ALT=&#34;lhard&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- l harpoon-down -->
<!ENTITY lharu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lharu.gif&#34; ALT=&#34;lharu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left harpoon-up -->
<!ENTITY lhblk "&#x2584;">	<!-- lower half block -->
<!ENTITY lim " lim ">
<!ENTITY liminf " liminf ">
<!ENTITY limsup " limsup ">
<!ENTITY ljcy "&#x0459;">	<!-- CYRILLIC SMALL LETTER LJE -->
<!ENTITY ll "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ll.gif&#34; ALT=&#34;ll&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- double less than -->
<!ENTITY lll "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lll.gif&#34; ALT=&#34;lll&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triple less than -->
<!ENTITY llless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/llless.gif&#34; ALT=&#34;llless&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triple less than -->
<!ENTITY lmidot "&#x0140;">	<!-- LATIN SMALL LETTER L WITH MIDDLE DOT -->
<!ENTITY ln " ln ">
<!ENTITY lnE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lnE.gif&#34; ALT=&#34;lnE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less, not double equals -->
<!ENTITY lnap "&#x2A89;">	<!-- less, not approximate -->
<!ENTITY lnapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lnapprox.gif&#34; ALT=&#34;lnapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than, not approximate -->
<!ENTITY lne "&#x2A87;">	<!-- less, not equals -->
<!ENTITY lneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lneq.gif&#34; ALT=&#34;lneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than over single not equal -->
<!ENTITY lneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lneqq.gif&#34; ALT=&#34;lneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than over dbl not equal -->
<!ENTITY lnot "&#x00AC;">	<!-- Logicl not -->
<!ENTITY lnsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lnsim.gif&#34; ALT=&#34;lnsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less, not similar -->
<!ENTITY log "log">
<!ENTITY longleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/longleftarrow.gif&#34; ALT=&#34;longleftarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left long arrow -->
<!ENTITY longleftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/longleftrightarrow.gif&#34; ALT=&#34;longleftrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left-right long arrow -->
<!ENTITY longmapsto "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/longmapsto.gif&#34; ALT=&#34;longmapsto&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- mapsto long -->
<!ENTITY longrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/longrightarrow.gif&#34; ALT=&#34;longrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right long arrow -->
<!ENTITY looparrowleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/looparrowleft.gif&#34; ALT=&#34;looparrowleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left looped arrow -->
<!ENTITY looparrowright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/looparrowright.gif&#34; ALT=&#34;looparrowright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right looped arrow -->
<!ENTITY lor "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lor.gif&#34; ALT=&#34;vee&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Logical or -->
<!ENTITY lowast "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lowast.gif&#34; ALT=&#34;lowast&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- low asterisk -->
<!ENTITY lowbar "_">	<!-- low line -->
<!ENTITY loz "&#x25CA;">	<!-- lozenge or total mark -->
<!ENTITY lozenge "&#x25CA;">	<!-- lozenge -->
<!ENTITY lozf "&#x29EB;">	<!-- black lozenge -->
<!ENTITY lpar "(">	<!-- left parenthesis -->
<!ENTITY lparlt "&#x2993;">	<!-- left parenthesis, lt -->
<!ENTITY lquot "'">	<!-- left quote -->
<!ENTITY lrarr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lrarr2.gif&#34; ALT=&#34;lrarr2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- l arr over r arr (now lrarr) -->
<!ENTITY lrhar2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lrhar2.gif&#34; ALT=&#34;lrhar2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- l harp over r (now lrhar) -->
<!ENTITY lsh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lsh.gif&#34; ALT=&#34;lsh&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- UPWARDS ARROW WITH TIP LEFTWARDS -->
<!ENTITY lsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lsim.gif&#34; ALT=&#34;lsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less, similar -->
<!ENTITY lslash "&#x0142;">	<!-- l slash -->
<!ENTITY lsqb "[">	<!-- left square bracket -->
<!ENTITY lsquo "'">	<!-- left single quote -->
<!ENTITY lsquor "'">	<!-- rising single quote, left (low) -->
<!ENTITY lstrok "&#x0142;">	<!-- LATIN SMALL LETTER L WITH STROKE -->
<!ENTITY lthree "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lthree.gif&#34; ALT=&#34;lthree&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- lefthreetimes -->
<!ENTITY ltimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ltimes.gif&#34; ALT=&#34;ltimes&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- times sign, left closed -->
<!ENTITY ltri "&#x25C3;">	<!-- l triangle, open -->
<!ENTITY ltrie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ltrie.gif&#34; ALT=&#34;ltrie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less triangle, eq -->
<!ENTITY ltrif "&#x25C2;">	<!-- l tri, filled -->
<!ENTITY lvertneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/lvertneqq.gif&#34; ALT=&#34;lvertneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- less than over dbl v not equal -->
<!ENTITY lvnE "&#x2268;">	<!-- less, ver, not dbl eq. MathML: x2268xfe00 -->
<!ENTITY macr "&#x0304;">	<!-- macron. MathML: x00AF -->
<!ENTITY male "&#x2642;">	<!-- male symbol -->
<!ENTITY malt "&#x2720;">	<!-- maltese cross -->
<!ENTITY map "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/map.gif&#34; ALT=&#34;map&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- mapsto -->
<!ENTITY mapsto "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mapsto.gif&#34; ALT=&#34;mapsto&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- maps to -->
<!ENTITY marker "&#x25AE;">	<!-- histogram marker -->
<!ENTITY mars "&#x2642;">	<!-- Mars symbol -->
<!ENTITY max " max ">
<!ENTITY mbreve "m&#x0306;">	<!-- breve m -->
<!ENTITY mcedil "m&#x0327;">	<!-- m cedilla -->
<!ENTITY mcheck "m&#x030C;">	<!-- check m -->
<!ENTITY mcy "&#x043C;">	<!-- CYRILLIC SMALL LETTER EM -->
<!ENTITY mdash "&#x2014;">	<!-- em dash -->
<!ENTITY measuredangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/measuredangle.gif&#34; ALT=&#34;measuredangle&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- measured angle -->
<!ENTITY mercury "&#x263F;">	<!-- Mercury symbol -->
<!ENTITY mgr "&#x03BC;">	<!-- GREEK SMALL LETTER MU -->
<!ENTITY mho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mho.gif&#34; ALT=&#34;mho&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- inverted ohm -->
<!ENTITY micro "&#x00B5;">	<!-- micro sign -->
<!ENTITY mid "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mid.gif&#34; ALT=&#34;mid&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- DIVIDES -->
<!ENTITY middot "&#x00B7;">	<!-- middle dot -->
<!ENTITY min " min ">
<!ENTITY minus "&#x2212;">	<!-- minus sign -->
<!ENTITY minusb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/minusb.gif&#34; ALT=&#34;minusb&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- minus sign in box -->
<!ENTITY mldr "&#x2026;">	<!-- em leader -->
<!ENTITY mnplus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mnplus.gif&#34; ALT=&#34;mnplus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- minus-or-plus sign -->
<!ENTITY models "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/models.gif&#34; ALT=&#34;models&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- MODELS -->
<!ENTITY moon "&#x263E;">	<!-- Moon symbol -->
<!ENTITY mp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mp.gif&#34; ALT=&#34;mp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Minus or plus -->
<!ENTITY mu "&#x03BC;">	<!-- small my, Greek -->
<!ENTITY muchgt "&#x226B;">	<!-- much greater than -->
<!ENTITY muchlt "&#x226A;">	<!-- much less than -->
<!ENTITY multimap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/multimap.gif&#34; ALT=&#34;multimap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- multimap -->
<!ENTITY mumap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/mumap.gif&#34; ALT=&#34;mumap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- multimap -->
<!ENTITY nLeftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nLeftarrow.gif&#34; ALT=&#34;nLeftarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left double arrow -->
<!ENTITY nLeftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nLeftrightarrow.gif&#34; ALT=&#34;nLeftrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left-right dbl arr -->
<!ENTITY nRightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nRightarrow.gif&#34; ALT=&#34;nRightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not right double arrow -->
<!ENTITY nVDash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nVDash.gif&#34; ALT=&#34;nVDash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not dbl vert, dbl dash -->
<!ENTITY nVdash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nVdash.gif&#34; ALT=&#34;nVdash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not dbl vertical, dash -->
<!ENTITY nabla "&#x2207;">	<!-- del, Hamilton operator -->
<!ENTITY nacute "&#x0144;">	<!-- LATIN SMALL LETTER N WITH ACUTE -->
<!ENTITY nap "&#x2249;">	<!-- not approximate -->
<!ENTITY napos "&#x0149;">	<!-- LATIN SMALL LETTER N PRECEDED BY APOSTROPHE -->
<!ENTITY natur "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/natur.gif&#34; ALT=&#34;natur&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- music natural -->
<!ENTITY natural "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/natural.gif&#34; ALT=&#34;natural&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Musical natural sign -->
<!ENTITY nbreve "n&#x0306;">	<!-- breve n -->
<!ENTITY nbsp "&#x00A0;">	<!-- no break (required) space -->
<!ENTITY ncaron "&#x0148;">	<!-- LATIN SMALL LETTER N WITH CARON -->
<!ENTITY ncedil "&#x0146;">	<!-- LATIN SMALL LETTER N WITH CEDILLA -->
<!ENTITY ncheck "&#x0148;">	<!-- check n -->
<!ENTITY ncong "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ncong.gif&#34; ALT=&#34;ncong&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not congruent with -->
<!ENTITY ncy "&#x043D;">	<!-- CYRILLIC SMALL LETTER EN -->
<!ENTITY ndash "&#x2013;">	<!-- en dash -->
<!ENTITY ne "&#x2260;">	<!-- not equal -->
<!ENTITY nearr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nearr.gif&#34; ALT=&#34;nearr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- NE pointing arrow -->
<!ENTITY nearrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nearrow.gif&#34; ALT=&#34;nearrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- northeast arrow -->
<!ENTITY neg "&#x00AC;">	<!-- Negation -->
<!ENTITY neptune "&#x2646;">	<!-- Neptune symbol -->
<!ENTITY neq "&#x2260;">	<!-- not equal -->
<!ENTITY nequiv "&#x2262;">	<!-- not identical with -->
<!ENTITY nexist "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nexist.gif&#34; ALT=&#34;nexist&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- negated exists -->
<!ENTITY nexists "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nexists.gif&#34; ALT=&#34;nexists&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- there does not exist -->
<!ENTITY ngE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngE.gif&#34; ALT=&#34;ngE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not greater, dbl equals. MathML: x2267x0338 -->
<!ENTITY nge "&#x2271;">	<!-- not greater-than-or-equal -->
<!ENTITY ngeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngeq.gif&#34; ALT=&#34;ngeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not gtr than or equal -->
<!ENTITY ngeqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngeqq.gif&#34; ALT=&#34;ngeqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not gtr double equal -->
<!ENTITY ngeqslant "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngeqslant.gif&#34; ALT=&#34;ngeqslant&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less slant equal -->
<!ENTITY nges "&#x2271;">	<!-- not gt-or-eq, slanted. MathML: x2A7Ex0338 -->
<!ENTITY ngr "&#x03BD;">	<!-- GREEK SMALL LETTER NU -->
<!ENTITY ngt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngt.gif&#34; ALT=&#34;ngt&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not greater-than -->
<!ENTITY ngtr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ngtr.gif&#34; ALT=&#34;ngtr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not gtr than -->
<!ENTITY nhArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nhArr.gif&#34; ALT=&#34;nhArr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not l&r dbl arr -->
<!ENTITY nharr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nharr.gif&#34; ALT=&#34;nharr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not l&r arrow -->
<!ENTITY ni "&#x220D;">	<!-- contains. MathML has x220B -->
<!ENTITY ninehalves "9&#x2044;2">	<!-- 9/2 -->
<!ENTITY njcy "&#x045A;">	<!-- CYRILLIC SMALL LETTER NJE -->
<!ENTITY nlArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nlArr.gif&#34; ALT=&#34;nlArr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- nLeftarrow: not implied by -->
<!ENTITY nlE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nlE.gif&#34; ALT=&#34;nlE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less, dbl equals. MathML: x2266x0338 -->
<!ENTITY nlarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nlarr.gif&#34; ALT=&#34;nlarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left arrow -->
<!ENTITY nldr "&#x2025;">	<!-- double baseline dot (en leader) -->
<!ENTITY nle "&#x2270;">	<!-- not less-than-or-equal -->
<!ENTITY nleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nleftarrow.gif&#34; ALT=&#34;nleftarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left arrow -->
<!ENTITY nleftrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nleftrightarrow.gif&#34; ALT=&#34;nleftrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left-right arrow -->
<!ENTITY nleq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nleq.gif&#34; ALT=&#34;nleq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less than or equal -->
<!ENTITY nleqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nleqq.gif&#34; ALT=&#34;nleqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less double equal -->
<!ENTITY nleqslant "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nleqslant.gif&#34; ALT=&#34;nleqslant&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less slant equal -->
<!ENTITY nles "&#x2270;">	<!-- not less-or-eq, slant. MathML: x27ADx0338 -->
<!ENTITY nless "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nless.gif&#34; ALT=&#34;nless&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less than -->
<!ENTITY nlt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nlt.gif&#34; ALT=&#34;nlt&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less-than -->
<!ENTITY nltri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nltri.gif&#34; ALT=&#34;nltri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left triangle -->
<!ENTITY nltrie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nltrie.gif&#34; ALT=&#34;nltrie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not l tri, eq -->
<!ENTITY nmid "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nmid.gif&#34; ALT=&#34;nmid&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- DOES NOT DIVIDE -->
<!ENTITY not "&#x00AC;">	<!-- not sign -->
<!ENTITY notapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notapprox.gif&#34; ALT=&#34;notapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not apprpximately equal -->
<!ENTITY notasymp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notasymp.gif&#34; ALT=&#34;notasymp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not equivalent -->
<!ENTITY notcong "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notcong.gif&#34; ALT=&#34;notcong&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not approximate or equal -->
<!ENTITY noteq "&#x2260;">	<!-- not equal -->
<!ENTITY notequiv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notequiv.gif&#34; ALT=&#34;notequiv&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not identical -->
<!ENTITY notgeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notgeq.gif&#34; ALT=&#34;notgeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not greater than or equal -->
<!ENTITY notgt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notgt.gif&#34; ALT=&#34;notgt&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not greater than -->
<!ENTITY notin "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notin.gif&#34; ALT=&#34;notin&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- negated set membership -->
<!ENTITY notleq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notleq.gif&#34; ALT=&#34;notleq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less than or equal -->
<!ENTITY notlt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notlt.gif&#34; ALT=&#34;notlt&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not less than -->
<!ENTITY notprec "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notprec.gif&#34; ALT=&#34;notprec&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not preceding -->
<!ENTITY notpreceq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notpreceq.gif&#34; ALT=&#34;notpreceq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not preceding or equal -->
<!ENTITY notsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsim.gif&#34; ALT=&#34;notsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not similar -->
<!ENTITY notsimeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsimeq.gif&#34; ALT=&#34;notsimeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not similar or equal -->
<!ENTITY notsqsubseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsqsubseteq.gif&#34; ALT=&#34;notsqsubseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not square subset or equal -->
<!ENTITY notsqsupseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsqsupseteq.gif&#34; ALT=&#34;notsqsupseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not square superset or equal -->
<!ENTITY notsubset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsubset.gif&#34; ALT=&#34;notsubset&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not subset -->
<!ENTITY notsubseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsubseteq.gif&#34; ALT=&#34;notsubseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not subset or equal -->
<!ENTITY notsucc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsucc.gif&#34; ALT=&#34;notsucc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not succeeding -->
<!ENTITY notsucceq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsucceq.gif&#34; ALT=&#34;notsucceq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not succeeding or equal -->
<!ENTITY notsupset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsupset.gif&#34; ALT=&#34;notsupset&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not superset -->
<!ENTITY notsupseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/notsupseteq.gif&#34; ALT=&#34;notsupseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not superset or equal -->
<!ENTITY npar "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/npar.gif&#34; ALT=&#34;npar&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not parallel -->
<!ENTITY nparallel "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nparallel.gif&#34; ALT=&#34;nparallel&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not parallel -->
<!ENTITY npr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/npr.gif&#34; ALT=&#34;npr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not precedes -->
<!ENTITY npre "&#x22E0;">	<!-- not precedes, equals. MathML: x2AAFx0338 -->
<!ENTITY nprec "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nprec.gif&#34; ALT=&#34;nprec&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not precedes -->
<!ENTITY npreceq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/npreceq.gif&#34; ALT=&#34;npreceq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not precedes or equal -->
<!ENTITY nrArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nrArr.gif&#34; ALT=&#34;nrArr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- nRightarrow: not implies -->
<!ENTITY nrarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nrarr.gif&#34; ALT=&#34;nrarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not right arrow -->
<!ENTITY nrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nrightarrow.gif&#34; ALT=&#34;nrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not right arrow -->
<!ENTITY nrtri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nrtri.gif&#34; ALT=&#34;nrtri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not rt triangle -->
<!ENTITY nrtrie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nrtrie.gif&#34; ALT=&#34;nrtrie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not rt tri, eq -->
<!ENTITY nsc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsc.gif&#34; ALT=&#34;nsc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not succeeds -->
<!ENTITY nsce "&#x22E1;">	<!-- not succeeds, curly eq -->
<!ENTITY nshortmid "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nshortmid.gif&#34; ALT=&#34;nshortmid&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- (not short) does not divide -->
<!ENTITY nshortparallel "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nshortparallel.gif&#34; ALT=&#34;nshortparallel&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- (not short) not parallel -->
<!ENTITY nsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsim.gif&#34; ALT=&#34;nsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not similar -->
<!ENTITY nsime "&#x2244;">	<!-- not similar, equals -->
<!ENTITY nsmid "&#x2224;">	<!-- DOES NOT DIVIDE -->
<!ENTITY nspar "&#x2226;">	<!-- not short parallel -->
<!ENTITY nsub "&#x2284;">	<!-- not subset -->
<!ENTITY nsubE "&#x2288;">	<!-- not subset, dbl eq. MathML: x2AC5x0338 -->
<!ENTITY nsube "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsube.gif&#34; ALT=&#34;nsube&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not subset, equals -->
<!ENTITY nsubseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsubseteq.gif&#34; ALT=&#34;nsubseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not subset or equal -->
<!ENTITY nsubseteqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsubseteqq.gif&#34; ALT=&#34;nsubseteqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not subset or dbl eq -->
<!ENTITY nsucc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsucc.gif&#34; ALT=&#34;nsucc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not succeeds -->
<!ENTITY nsucceq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsucceq.gif&#34; ALT=&#34;nsucceq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not succeeds or equal -->
<!ENTITY nsup "&#x2285;">	<!-- not superset -->
<!ENTITY nsupE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsupE.gif&#34; ALT=&#34;nsupE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not superset, dbl eq. MathML: x2AC6x0338 -->
<!ENTITY nsupe "&#x2289;">	<!-- not superset, equals -->
<!ENTITY nsupseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsupseteq.gif&#34; ALT=&#34;nsupseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not superset or equal -->
<!ENTITY nsupseteqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nsupseteqq.gif&#34; ALT=&#34;nsupseteqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not superset or dbl eq -->
<!ENTITY ntilde "&#x00F1;">	<!-- LATIN SMALL LETTER N WITH TILDE -->
<!ENTITY ntriangleleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ntriangleleft.gif&#34; ALT=&#34;ntriangleleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left triangle -->
<!ENTITY ntrianglelefteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ntrianglelefteq.gif&#34; ALT=&#34;ntrianglelefteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not left triangle eq -->
<!ENTITY ntriangleright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ntriangleright.gif&#34; ALT=&#34;ntriangleright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not right triangle -->
<!ENTITY ntrianglerighteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ntrianglerighteq.gif&#34; ALT=&#34;ntrianglerighteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not right triangle eq -->
<!ENTITY nu "&#x03BD;">	<!-- small nu, Greek -->
<!ENTITY num "&#x0023;">	<!-- number sign -->
<!ENTITY numero "&#x2116;">	<!-- NUMERO SIGN -->
<!ENTITY numsp "&#x2007;">	<!-- digit space (width of a number) -->
<!ENTITY nvDash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nvDash.gif&#34; ALT=&#34;nvDash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not vertical, dbl dash -->
<!ENTITY nvdash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nvdash.gif&#34; ALT=&#34;nvdash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- not vertical, dash -->
<!ENTITY nwarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nwarr.gif&#34; ALT=&#34;nwarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- NW pointing arrow -->
<!ENTITY nwarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/nwarrow.gif&#34; ALT=&#34;nwarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- northwest arrow -->
<!ENTITY oS "&#x24C8;">	<!-- captal S in circle -->
<!ENTITY oacgr "&#x03CC;">	<!-- GREEK SMALL LETTER OMICRON WITH TONOS -->
<!ENTITY oacute "&#x00F3;">	<!-- LATIN SMALL LETTER O WITH ACUTE -->
<!ENTITY oast "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/oast.gif&#34; ALT=&#34;oast&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- asterisk in circle -->
<!ENTITY obreve "&#x014F;">	<!-- breve o -->
<!ENTITY ocedil "o&#x0327;">	<!-- o cedilla -->
<!ENTITY ocheck "&#x01D2;">	<!-- check o -->
<!ENTITY ocir "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ocir.gif&#34; ALT=&#34;ocir&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small circle in circle -->
<!ENTITY ocirc "&#x00F4;">	<!-- LATIN SMALL LETTER O WITH CIRCUMFLEX -->
<!ENTITY ocy "&#x043E;">	<!-- CYRILLIC SMALL LETTER O -->
<!ENTITY odash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/odash.gif&#34; ALT=&#34;odash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- hyphen in circle -->
<!ENTITY odblac "&#x0151;">	<!-- LATIN SMALL LETTER O WITH DOUBLE ACUTE -->
<!ENTITY odot "&#x2299;">	<!-- middle dot in circle -->
<!ENTITY oelig "&#x0153;">	<!-- LATIN SMALL LIGATURE OE -->
<!ENTITY ogon "&#x0328;">	<!-- ogonek. MathML: x02DB -->
<!ENTITY ogr "&#60;i&#62;o&#60;/i&#62;">	<!-- GREEK SMALL LETTER OMICRON -->
<!ENTITY ograve "&#x00F2;">	<!-- LATIN SMALL LETTER O WITH GRAVE -->
<!ENTITY ohacgr "&#x03CE;">	<!-- GREEK SMALL LETTER OMEGA WITH TONOS -->
<!ENTITY ohgr "&#x03C9;">	<!-- GREEK SMALL LETTER OMEGA -->
<!ENTITY ohm "&#x2126;">	<!-- ohm sign -->
<!ENTITY oint "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/oint.gif&#34; ALT=&#34;oint&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Countour integral -->
<!ENTITY olarr "&#x21BA;">	<!-- l arr in circle -->
<!ENTITY omacr "&#x014D;">	<!-- LATIN SMALL LETTER O WITH MACRON -->
<!ENTITY omega "&#x03C9;">	<!-- small omega, Greek -->
<!ENTITY omicron "&#x03BF;">
<!ENTITY ominus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ominus.gif&#34; ALT=&#34;ominus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- minus sign in circle -->
<!ENTITY online ", online ">
<!ENTITY oplus "&#x2295;">	<!-- plus sign in circle -->
<!ENTITY or "&#x2228;">	<!-- logical or -->
<!ENTITY orarr "&#x21BB;">	<!-- r arr in circle -->
<!ENTITY order "&#x2134;">	<!-- order of (script small O) -->
<!ENTITY ordf "&#x00AA;">	<!-- ordinal indicator, feminine -->
<!ENTITY ordm "&#x00BA;">	<!-- ordinal indicator, masculine -->
<!ENTITY oslash "&#x00F8;">	<!-- LATIN SMALL LETTER O WITH STROKE -->
<!ENTITY oslashed "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/oslashed.gif&#34; ALT=&#34;oslash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Slashed circle -->
<!ENTITY osol "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/osol.gif&#34; ALT=&#34;osol&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- solidus in circle -->
<!ENTITY otilde "&#x00F5;">	<!-- LATIN SMALL LETTER O WITH TILDE -->
<!ENTITY otimes "&#x2297;">	<!-- multiply sign in circle -->
<!ENTITY ouml "&#x00F6;">	<!-- LATIN SMALL LETTER O WITH DIAERESIS -->
<!ENTITY overline0 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline0.gif&#34; ALT=&#34;overline 0&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline1 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline1.gif&#34; ALT=&#34;overline 1&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline2.gif&#34; ALT=&#34;overline 2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline3.gif&#34; ALT=&#34;overline 3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline4 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline4.gif&#34; ALT=&#34;overline 4&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline5 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline5.gif&#34; ALT=&#34;overline 5&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline6 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline6.gif&#34; ALT=&#34;overline 6&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline7 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline7.gif&#34; ALT=&#34;overline 7&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline8 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline8.gif&#34; ALT=&#34;overline 8&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY overline9 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/overline9.gif&#34; ALT=&#34;overline 9&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Vectors; characters with over arrow -->
<!ENTITY owns "&#x220D;">	<!-- contains -->
<!ENTITY par "&#x2225;">	<!-- parallel -->
<!ENTITY para "&#x00B6;">	<!-- pilcrow (paragraph sign) -->
<!ENTITY parallel "&#x2225;">	<!-- parallel to -->
<!ENTITY part "&#x2202;">	<!-- partial differential -->
<!ENTITY partial "&#x2202;">	<!-- Partial differential -->
<!ENTITY pbreve "p&#x0306;">	<!-- breve p -->
<!ENTITY pcedil "p&#x0327;">	<!-- p cedilla -->
<!ENTITY pcheck "p&#x030C;">	<!-- check p -->
<!ENTITY pcy "&#x043F;">	<!-- CYRILLIC SMALL LETTER PE -->
<!ENTITY percent "&#x0025;">	<!-- percent sign -->
<!ENTITY percnt "&#x0025;">	<!-- percent sign -->
<!ENTITY period ".">	<!-- full stop, period -->
<!ENTITY permil "&#x2030;">	<!-- per thousand -->
<!ENTITY perp "&#x22A5;">	<!-- perpendicular -->
<!ENTITY pgr "&#x03C0;">	<!-- GREEK SMALL LETTER PI -->
<!ENTITY phgr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/phgr.gif&#34; ALT=&#34;phgr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- GREEK SMALL LETTER PHI -->
<!ENTITY phi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/phi.gif&#34; ALT=&#34;phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY phis "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/phi.gif&#34; ALT=&#34;phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- small straight phi -->
<!ENTITY phiv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/phiv.gif&#34; ALT=&#34;phiv&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- small curly or open phi -->
<!ENTITY phmmat "&#x2133;">	<!-- physics M-matrix (script capital M) -->
<!ENTITY phone "&#x260E;">	<!-- telephone symbol -->
<!ENTITY pi "&#x03C0;">	<!-- small pi, Greek -->
<!ENTITY pitchfork "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/pitchfork.gif&#34; ALT=&#34;pitchfork&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- proper intersection -->
<!ENTITY piv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/piv.gif&#34; ALT=&#34;piv&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- varpi -->
<!ENTITY planck "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/planck.gif&#34; ALT=&#34;planck&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Planck's over 2pi -->
<!ENTITY plus "+">	<!-- plus sign -->
<!ENTITY plusb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/plusb.gif&#34; ALT=&#34;plusb&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- plus sign in box -->
<!ENTITY plusdo "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/plusdo.gif&#34; ALT=&#34;plusdo&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- plus sign, dot above -->
<!ENTITY plusmn "&#x00B1;">	<!-- plus-or-minus sign -->
<!ENTITY pluto "&#x2647;">	<!-- Pluto symbol -->
<!ENTITY pm "&#x00B1;">	<!-- Plus or minus -->
<!ENTITY pound "&#x00A3;">	<!-- pound sign -->
<!ENTITY pounds "&#x00A3;">	<!-- pound sign -->
<!ENTITY pr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/pr.gif&#34; ALT=&#34;pr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes -->
<!ENTITY prap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/prap.gif&#34; ALT=&#34;prap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes, approximate -->
<!ENTITY pre "&#x2AAF;">	<!-- precedes, equals -->
<!ENTITY prec "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/prec.gif&#34; ALT=&#34;prec&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes -->
<!ENTITY precapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/precapprox.gif&#34; ALT=&#34;precapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes or approximate -->
<!ENTITY preccurlyeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/preccurlyeq.gif&#34; ALT=&#34;preccurlyeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes or curly equal -->
<!ENTITY preceq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/preceq.gif&#34; ALT=&#34;preceq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes or equal -->
<!ENTITY precnapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/precnapprox.gif&#34; ALT=&#34;precnapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes over not almost equal -->
<!ENTITY precneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/precneqq.gif&#34; ALT=&#34;precneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes over not equal -->
<!ENTITY precnsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/precnsim.gif&#34; ALT=&#34;precnsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes but not equivalent -->
<!ENTITY precsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/precsim.gif&#34; ALT=&#34;precsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes or equivalent -->
<!ENTITY prime "'">	<!-- prime or minute -->
<!ENTITY prnE "&#x2AB5;">	<!-- precedes, not dbl eq -->
<!ENTITY prnap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/prnap.gif&#34; ALT=&#34;prnap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- precedes, not approx -->
<!ENTITY prnsim "&#x22E8;">	<!-- precedes, not similar -->
<!ENTITY prod "&#x220F;">	<!-- product operator -->
<!ENTITY prop "&#x221D;">	<!-- is proportional to -->
<!ENTITY propto "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/propto.gif&#34; ALT=&#34;propto&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- proportional to -->
<!ENTITY prsim "&#x227E;">	<!-- precedes, similar -->
<!ENTITY psgr "&#x03C8;">	<!-- GREEK SMALL LETTER PSI -->
<!ENTITY psi "&#x03C8;">	<!-- small psi, Greek -->
<!ENTITY puncsp "&#x2008;">	<!-- punctuation space (width of comma) -->
<!ENTITY qbreve "q&#x0306;">	<!-- breve q -->
<!ENTITY qcedil "q&#x0327;">	<!-- q cedilla -->
<!ENTITY qcheck "q&#x030C;">	<!-- check q -->
<!ENTITY quarter "&#x00BC;">	<!-- 1/4 -->
<!ENTITY quest "?">	<!-- question mark -->
<!ENTITY quot "&#34;">	<!-- quotation mark -->
<!ENTITY rAarr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rAarr.gif&#34; ALT=&#34;rAarr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right triple arrow -->
<!ENTITY rArr "&#x21D2;">	<!-- rightarrow, implies -->
<!ENTITY racute "&#x0155;">	<!-- LATIN SMALL LETTER R WITH ACUTE -->
<!ENTITY radic "&#x221A;">	<!-- surd or radical -->
<!ENTITY rang "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rang.gif&#34; ALT=&#34;rang&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- right angle bracket -->
<!ENTITY rangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rangle.gif&#34; ALT=&#34;rangle&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- right angle bracket -->
<!ENTITY raquo "&#x00BB;">	<!-- angle quotation mark, right -->
<!ENTITY rarr "&#x2192;">	<!-- rightward arrow -->
<!ENTITY rarr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rarr2.gif&#34; ALT=&#34;rarr2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- two rt arrows (now rrarr) -->
<!ENTITY rarrhk "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rarrhk.gif&#34; ALT=&#34;rarrhk&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt arrow-hooked -->
<!ENTITY rarrlp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rarrlp.gif&#34; ALT=&#34;rarrlp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt arrow-looped -->
<!ENTITY rarrr "&#x27F6;">
<!ENTITY rarrtl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rarrtl.gif&#34; ALT=&#34;rarrtl&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt arrow-tailed -->
<!ENTITY rarrw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rarrw.gif&#34; ALT=&#34;rarrw&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt arrow-wavy -->
<!ENTITY rbrace "}">	<!-- right curly brace -->
<!ENTITY rbrack "]">	<!-- right bracket -->
<!ENTITY rbreve "r&#x0306;">	<!-- breve r -->
<!ENTITY rcaron "&#x0159;">	<!-- LATIN SMALL LETTER R WITH CARON -->
<!ENTITY rcedil "&#x0157;">	<!-- LATIN SMALL LETTER R WITH CEDILLA -->
<!ENTITY rceil "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rceil.gif&#34; ALT=&#34;rceil&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right ceiling -->
<!ENTITY rcheck "&#x0159;">	<!-- check r -->
<!ENTITY rchevron "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rchevron.gif&#34; ALT=&#34;rchevron&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right chevron -->
<!ENTITY rcub "}">	<!-- right curly bracket -->
<!ENTITY rcy "&#x0440;">	<!-- CYRILLIC SMALL LETTER ER -->
<!ENTITY rdchevron "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rdchevron.gif&#34; ALT=&#34;rdchevron&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right double chevron -->
<!ENTITY rdquo "&#34;">	<!-- double quotation mark, right -->
<!ENTITY rdquor "&#34;">	<!-- rising dbl quote, right (high) -->
<!ENTITY re "Re">	<!-- Upright &#34;Re&#34; for real -->
<!ENTITY real "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/real.gif&#34; ALT=&#34;real&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- real -->
<!ENTITY received "Received ">
<!ENTITY rect "&#x25AD;">	<!-- rectangle, open -->
<!ENTITY reg "&#x00AE;">	<!-- registered sign -->
<!ENTITY registered "&#x00AE;">	<!-- registered trademark -->
<!ENTITY restriction "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/restriction.gif&#34; ALT=&#34;restriction&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up harpoon right head -->
<!ENTITY rfloor "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rfloor.gif&#34; ALT=&#34;rfloor&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right floor -->
<!ENTITY rgr "&#x03C1;">	<!-- GREEK SMALL LETTER RHO -->
<!ENTITY rhard "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rhard.gif&#34; ALT=&#34;rhard&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt harpoon-down -->
<!ENTITY rharu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rharu.gif&#34; ALT=&#34;rharu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rt harpoon-up -->
<!ENTITY rho "&#x03C1;">	<!-- small rho, Greek -->
<!ENTITY rhov "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rhov.gif&#34; ALT=&#34;rhov&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- varrho -->
<!ENTITY rightarrow "&#x2192;">	<!-- right arrow -->
<!ENTITY rightarrowtail "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightarrowtail.gif&#34; ALT=&#34;rightarrowtail&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right tailed arrow -->
<!ENTITY rightharpoondown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightharpoondown.gif&#34; ALT=&#34;rightharpoondown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right harpoon down head -->
<!ENTITY rightharpoonup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightharpoonup.gif&#34; ALT=&#34;rightharpoonup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right harpoon up head -->
<!ENTITY rightleftarrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightleftarrows.gif&#34; ALT=&#34;rightleftarrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right over left arrow -->
<!ENTITY rightleftharpoons "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightleftharpoons.gif&#34; ALT=&#34;rightleftharpoons&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right harpoon over left -->
<!ENTITY rightrightarrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightrightarrows.gif&#34; ALT=&#34;rightrightarrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right arrow pair -->
<!ENTITY rightsquigarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightsquigarrow.gif&#34; ALT=&#34;rightsquigarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right squiggle arrow -->
<!ENTITY rightthreetimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rightthreetimes.gif&#34; ALT=&#34;rightthreetimes&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right semidirect product -->
<!ENTITY ring "&#x030A;">	<!-- ring. MathML: x02DA -->
<!ENTITY risingdotseq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/risingdotseq.gif&#34; ALT=&#34;risingdotseq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- equal with dot NE and SW -->
<!ENTITY rlarr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rlarr2.gif&#34; ALT=&#34;rlarr2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- r arr over l arr (now rlarr) -->
<!ENTITY rlhar2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rlhar2.gif&#34; ALT=&#34;rlhar2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- r harp over l (new rlhar) -->
<!ENTITY rpar ")">	<!-- right parenthesis -->
<!ENTITY rpargt "&#x2994;">	<!-- right paren, gt -->
<!ENTITY rquot "'">	<!-- right quote -->
<!ENTITY rsh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rsh.gif&#34; ALT=&#34;rsh&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- UPWARDS ARROW WITH TIP RIGHTWARDS -->
<!ENTITY rsqb "]">	<!-- right square bracket -->
<!ENTITY rsquo "'">	<!-- single quotation mark, right -->
<!ENTITY rsquor "'">	<!-- rising single quote, right (high) -->
<!ENTITY rthree "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rthree.gif&#34; ALT=&#34;rthree&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- rightthreetimes -->
<!ENTITY rtimes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rtimes.gif&#34; ALT=&#34;rtimes&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- times sign, right closed -->
<!ENTITY rtri "&#x25B9;">	<!-- r triangle, open -->
<!ENTITY rtrie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/rtrie.gif&#34; ALT=&#34;rtrie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right tri, eq -->
<!ENTITY rtrif "&#x25B8;">	<!-- r tri, filled -->
<!ENTITY rx "&#x211E;">	<!-- Pharmaceutical prescription (Rx) -->
<!ENTITY sacute "&#x015B;">	<!-- LATIN SMALL LETTER S WITH ACUTE -->
<!ENTITY saturn "&#x2644;">	<!-- Saturn symbol -->
<!ENTITY sbond "&#x2013;">
<!ENTITY sbreve "s&#x0306;">	<!-- breve s -->
<!ENTITY sbsol "&#xFE68;">	<!-- SMALL REVERSE SOLIDUS. Not in MathML -->
<!ENTITY sc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sc.gif&#34; ALT=&#34;sc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds -->
<!ENTITY scap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/scap.gif&#34; ALT=&#34;scap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds, approximate -->
<!ENTITY scaron "&#x0161;">	<!-- LATIN SMALL LETTER S WITH CARON -->
<!ENTITY sccue "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sccue.gif&#34; ALT=&#34;sccue&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succceeds, curly eq -->
<!ENTITY sce "&#x2AB0;">	<!-- succeeds, equals -->
<!ENTITY scedil "&#x015F;">	<!-- LATIN SMALL LETTER S WITH CEDILLA -->
<!ENTITY scheck "&#x0161;">	<!-- check s -->
<!ENTITY scirc "&#x015D;">	<!-- LATIN SMALL LETTER S WITH CIRCUMFLEX -->
<!ENTITY scnE "&#x2AB6;">	<!-- succeeds, not dbl eq -->
<!ENTITY scnap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/scnap.gif&#34; ALT=&#34;scnap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds, not approx -->
<!ENTITY scnsim "&#x22E9;">	<!-- succeeds, not similar -->
<!ENTITY scsim "&#x227F;">	<!-- succeeds, similar -->
<!ENTITY scy "&#x0441;">	<!-- CYRILLIC SMALL LETTER ES -->
<!ENTITY sdot "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sdot.gif&#34; ALT=&#34;sdot&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small middle dot -->
<!ENTITY sdotb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sdotb.gif&#34; ALT=&#34;sdotb&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small dot in box -->
<!ENTITY searrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/searrow.gif&#34; ALT=&#34;searrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- southeast arrow -->
<!ENTITY sec " sec ">
<!ENTITY sect "&#x00A7;">	<!-- section sign -->
<!ENTITY semi ";">	<!-- semicolon -->
<!ENTITY setminus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/setminus.gif&#34; ALT=&#34;setminus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Set minus -->
<!ENTITY setmn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/setmn.gif&#34; ALT=&#34;setmn&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- reverse solidus -->
<!ENTITY sevenhalves "7&#x2044;2">	<!-- 7/2 -->
<!ENTITY sext "&#x2736;">	<!-- sextile (6-pointed star) -->
<!ENTITY sfgr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sfgr.gif&#34; ALT=&#34;sfgr&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY sfrown "&#x2322;">	<!-- small down curve -->
<!ENTITY sgr "&#x03C3;">	<!-- GREEK SMALL LETTER SIGMA -->
<!ENTITY sharp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sharp.gif&#34; ALT=&#34;sharp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- musical sharp -->
<!ENTITY shchcy "&#x0449;">	<!-- CYRILLIC SMALL LETTER SHCHA -->
<!ENTITY shcy "&#x0448;">	<!-- CYRILLIC SMALL LETTER SHA -->
<!ENTITY shortmid "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/shortmid.gif&#34; ALT=&#34;shortmid&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- (not short) divides -->
<!ENTITY shortparallel "&#x2225;">	<!-- (not short) parallel -->
<!ENTITY shy "&#x00AD;">	<!-- soft hyphen -->
<!ENTITY sigma "&#x03C3;">	<!-- small sigma, Greek -->
<!ENTITY sigmav "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsigma.gif&#34; ALT=&#34;sigmav&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- varsigma -->
<!ENTITY sim "~">	<!-- similar -->
<!ENTITY sime "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sime.gif&#34; ALT=&#34;sime&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- similar, equals -->
<!ENTITY simeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/simeq.gif&#34; ALT=&#34;simeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- similar or equal -->
<!ENTITY sin " sin ">
<!ENTITY sinh " sinh ">
<!ENTITY smallfrown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/smallfrown.gif&#34; ALT=&#34;smallfrown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small down curve -->
<!ENTITY smallsetminus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/smallsetminus.gif&#34; ALT=&#34;smallsetminus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- set minus (should be small) -->
<!ENTITY smallsmile "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/smallsmile.gif&#34; ALT=&#34;smallsmile&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small up curve -->
<!ENTITY smid "&#x2223;">	<!-- DIVIDES -->
<!ENTITY smile "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/smile.gif&#34; ALT=&#34;smile&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up curve -->
<!ENTITY softcy "&#x044C;">	<!-- CYRILLIC SMALL LETTER SOFT SIGN -->
<!ENTITY sol "/">	<!-- sOLIDUS -->
<!ENTITY spades "&#x2660;">	<!-- spades suit symbol -->
<!ENTITY spadesuit "&#x2660;">	<!-- Black spade suit -->
<!ENTITY spar "&#x2225;">	<!-- short parallel -->
<!ENTITY sphericalangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sphericalangle.gif&#34; ALT=&#34;sphericalangle&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- spherical angle -->
<!ENTITY sqcap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqcap.gif&#34; ALT=&#34;sqcap&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square intersection -->
<!ENTITY sqcup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqcup.gif&#34; ALT=&#34;sqcup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square union -->
<!ENTITY sqrt2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqrt2.gif&#34; ALT=&#34;sqrt2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- XXX &#34;&#x221A;2&#34; ??? -->
<!ENTITY sqrt3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqrt3.gif&#34; ALT=&#34;sqrt3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- XXX &#34;&#x221A;3&#34; ??? -->
<!ENTITY sqsub "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsub.gif&#34; ALT=&#34;sqsub&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square subset -->
<!ENTITY sqsube "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsube.gif&#34; ALT=&#34;sqsube&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square subset, equals -->
<!ENTITY sqsubset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsubset.gif&#34; ALT=&#34;sqsubset&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square subset -->
<!ENTITY sqsubseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsubseteq.gif&#34; ALT=&#34;sqsubseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square subset or equal -->
<!ENTITY sqsup "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsup.gif&#34; ALT=&#34;sqsup&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square superset -->
<!ENTITY sqsupe "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsupe.gif&#34; ALT=&#34;sqsupe&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square superset, eq -->
<!ENTITY sqsupset "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsupset.gif&#34; ALT=&#34;sqsupset&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square superset -->
<!ENTITY sqsupseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sqsupseteq.gif&#34; ALT=&#34;sqsupseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square superset or equal -->
<!ENTITY squ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/squ.gif&#34; ALT=&#34;squ&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square, open -->
<!ENTITY square "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/square.gif&#34; ALT=&#34;square&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- square -->
<!ENTITY squf "&#x25AA;">	<!-- sq bullet, filled -->
<!ENTITY ssetmn "&#x2216;">	<!-- sm reverse solidus -->
<!ENTITY ssmile "&#x2323;">	<!-- small up curve -->
<!ENTITY sstarf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/sstarf.gif&#34; ALT=&#34;sstarf&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- small star, filled -->
<!ENTITY star "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/star.gif&#34; ALT=&#34;star&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Star operator. MathML: 2606 for star, open -->
<!ENTITY starf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/starf.gif&#34; ALT=&#34;starf&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- star, filled -->
<!ENTITY sub "&#x2282;">	<!-- subset or is implied by -->
<!ENTITY subE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subE.gif&#34; ALT=&#34;subE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset, dbl equals -->
<!ENTITY sube "&#x2286;">	<!-- subset, equals -->
<!ENTITY subnE "&#x2ACB;">	<!-- subset, not dbl eq -->
<!ENTITY subne "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subne.gif&#34; ALT=&#34;subne&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset, not equals -->
<!ENTITY subset "&#x2282;">	<!-- subset -->
<!ENTITY subseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subseteq.gif&#34; ALT=&#34;subseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset or equal -->
<!ENTITY subseteqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subseteqq.gif&#34; ALT=&#34;subseteqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset over equals -->
<!ENTITY subsetneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subsetneq.gif&#34; ALT=&#34;subsetneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset over single not eq -->
<!ENTITY subsetneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/subsetneqq.gif&#34; ALT=&#34;subsetneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset over double not eq -->
<!ENTITY succ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succ.gif&#34; ALT=&#34;succ&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds -->
<!ENTITY succapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succapprox.gif&#34; ALT=&#34;succapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds or approximate -->
<!ENTITY succcurlyeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succcurlyeq.gif&#34; ALT=&#34;succcurlyeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds or curly equal -->
<!ENTITY succeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succeq.gif&#34; ALT=&#34;succeq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds or equal -->
<!ENTITY succnapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succnapprox.gif&#34; ALT=&#34;succnapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds over not almost equal -->
<!ENTITY succneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succneqq.gif&#34; ALT=&#34;succneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds over not equal -->
<!ENTITY succnsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succnsim.gif&#34; ALT=&#34;succnsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds but not equivalent -->
<!ENTITY succsim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/succsim.gif&#34; ALT=&#34;succsim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- succeeds or equivalent -->
<!ENTITY sum "&#x2211;">	<!-- summation operator -->
<!ENTITY sun "&#x2609;">	<!-- Sun symbol -->
<!ENTITY sung "&#x2669;">	<!-- music note (sung text sign). MathML: x266A -->
<!ENTITY sup "&#x2283;">	<!-- superset or implies -->
<!ENTITY sup1 "&#x00B9;">	<!-- superscript one -->
<!ENTITY sup2 "&#x00B2;">	<!-- superscript two -->
<!ENTITY sup3 "&#x00B3;">	<!-- superscript three -->
<!ENTITY supE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supE.gif&#34; ALT=&#34;supE&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset, dbl equals -->
<!ENTITY supe "&#x2287;">	<!-- superset, equals -->
<!ENTITY supnE "&#x2ACC;">	<!-- superset, not dbl eq -->
<!ENTITY supne "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supne.gif&#34; ALT=&#34;supne&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset, not equals -->
<!ENTITY supset "&#x2283;">	<!-- superset -->
<!ENTITY supseteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supseteq.gif&#34; ALT=&#34;supseteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset or equal -->
<!ENTITY supseteqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supseteqq.gif&#34; ALT=&#34;supseteqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset over equals -->
<!ENTITY supsetneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supsetneq.gif&#34; ALT=&#34;supsetneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset over single not eq -->
<!ENTITY supsetneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/supsetneqq.gif&#34; ALT=&#34;supsetneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset over double not eq -->
<!ENTITY surd "&#x221A;">	<!-- Square root -->
<!ENTITY swarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/swarrow.gif&#34; ALT=&#34;swarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- southwest arrow -->
<!ENTITY szlig "&#x00DF;">	<!-- LATIN SMALL LETTER SHARP S -->
<!ENTITY tan " tan ">
<!ENTITY tanh " tanh ">	<!-- Miscellaneous -->
<!ENTITY target "&#x2316;">	<!-- register mark or target -->
<!ENTITY tau "&#x03C4;">	<!-- small tau, Greek -->
<!ENTITY tbond "&#x2261;">
<!ENTITY tbreve "t&#x0306;">	<!-- breve t -->
<!ENTITY tcaron "&#x0165;">	<!-- LATIN SMALL LETTER T WITH CARON -->
<!ENTITY tcedil "&#x0163;">	<!-- LATIN SMALL LETTER T WITH CEDILLA -->
<!ENTITY tcheck "&#x0165;">	<!-- check t -->
<!ENTITY tcy "&#x0442;">	<!-- CYRILLIC SMALL LETTER TE -->
<!ENTITY tdot "&#x20DB;">	<!-- three dots above -->
<!ENTITY telrec "&#x2315;">	<!-- telephone recorder, symbol -->
<!ENTITY tgr "&#x03C4;">	<!-- GREEK SMALL LETTER TAU -->
<!ENTITY there4 "&#x2234;">	<!-- therefore -->
<!ENTITY therefore "&#x2234;">	<!-- therefore -->
<!ENTITY theta "&#x03B8;">
<!ENTITY thetas "&#x03B8;">	<!-- straight theta, Greek -->
<!ENTITY thetav "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vartheta.gif&#34; ALT=&#34;thetav&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- curly or open theta -->
<!ENTITY thgr "&#x03B8;">
<!ENTITY thickapprox "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/thickapprox.gif&#34; ALT=&#34;thickapprox&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- thick approximate -->
<!ENTITY thicksim "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/thicksim.gif&#34; ALT=&#34;thicksim&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- thick similar -->
<!ENTITY thinsp "&#x2009;">	<!-- thin space (1/6-em) -->
<!ENTITY thkap "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/ap.gif&#34; ALT=&#34;&#x2248;&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- thick approximate -->
<!ENTITY thksim "~">	<!-- think similar -->
<!ENTITY thorn "&#x00FE;">	<!-- LATIN SMALL LETTER THORN -->
<!ENTITY threehalves "3&#x2044;2">	<!-- 3/2 -->
<!ENTITY threequarter "&#x00BE;">	<!-- 3/4 -->
<!ENTITY tilde "&#x0303;">	<!-- tilde. MathML: x02DC -->
<!ENTITY tilde0 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde0.gif&#34; ALT=&#34;tilde 0&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 0 with tilde -->
<!ENTITY tilde1 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde1.gif&#34; ALT=&#34;tilde 1&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 1 with tilde -->
<!ENTITY tilde2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde2.gif&#34; ALT=&#34;tilde 2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 2 with tilde -->
<!ENTITY tilde3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde3.gif&#34; ALT=&#34;tilde 3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 3 with tilde -->
<!ENTITY tilde4 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde4.gif&#34; ALT=&#34;tilde 4&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 4 with tilde -->
<!ENTITY tilde5 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde5.gif&#34; ALT=&#34;tilde 5&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 5 with tilde -->
<!ENTITY tilde6 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde6.gif&#34; ALT=&#34;tilde 6&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 6 with tilde -->
<!ENTITY tilde7 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde7.gif&#34; ALT=&#34;tilde 7&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 7 with tilde -->
<!ENTITY tilde8 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde8.gif&#34; ALT=&#34;tilde 8&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 8 with tilde -->
<!ENTITY tilde9 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilde9.gif&#34; ALT=&#34;tilde 9&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- 9 with tilde -->
<!ENTITY tildeA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeA.gif&#34; ALT=&#34;tilde A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde A -->
<!ENTITY tildeB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeB.gif&#34; ALT=&#34;tilde B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde B -->
<!ENTITY tildeC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeC.gif&#34; ALT=&#34;tilde C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde C -->
<!ENTITY tildeD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeD.gif&#34; ALT=&#34;tilde D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde D -->
<!ENTITY tildeDelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeDelta.gif&#34; ALT=&#34;tilde Delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Delta -->
<!ENTITY tildeE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeE.gif&#34; ALT=&#34;tilde E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde E -->
<!ENTITY tildeF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeF.gif&#34; ALT=&#34;tilde F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde F -->
<!ENTITY tildeG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeG.gif&#34; ALT=&#34;tilde G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde G -->
<!ENTITY tildeGamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeGamma.gif&#34; ALT=&#34;tilde Gamma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Gamma -->
<!ENTITY tildeH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeH.gif&#34; ALT=&#34;tilde H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde H -->
<!ENTITY tildeI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeI.gif&#34; ALT=&#34;tilde I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde I -->
<!ENTITY tildeJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeJ.gif&#34; ALT=&#34;tilde J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde J -->
<!ENTITY tildeK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeK.gif&#34; ALT=&#34;tilde K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde K -->
<!ENTITY tildeL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeL.gif&#34; ALT=&#34;tilde L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde L -->
<!ENTITY tildeLambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeLambda.gif&#34; ALT=&#34;tilde Lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Lambda -->
<!ENTITY tildeM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeM.gif&#34; ALT=&#34;tilde M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde M -->
<!ENTITY tildeN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeN.gif&#34; ALT=&#34;tilde N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde N -->
<!ENTITY tildeO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeO.gif&#34; ALT=&#34;tilde O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde O -->
<!ENTITY tildeOmega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeOmega.gif&#34; ALT=&#34;tilde Omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Omega -->
<!ENTITY tildeP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeP.gif&#34; ALT=&#34;tilde P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde P -->
<!ENTITY tildePhi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildePhi.gif&#34; ALT=&#34;tilde Phi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Phi -->
<!ENTITY tildePi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildePi.gif&#34; ALT=&#34;tilde Pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Pi -->
<!ENTITY tildePsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildePsi.gif&#34; ALT=&#34;tilde Psi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Psi -->
<!ENTITY tildeQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeQ.gif&#34; ALT=&#34;tilde Q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde Q -->
<!ENTITY tildeR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeR.gif&#34; ALT=&#34;tilde R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde R -->
<!ENTITY tildeS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeS.gif&#34; ALT=&#34;tilde S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde S -->
<!ENTITY tildeSigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeSigma.gif&#34; ALT=&#34;tilde Sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Sigma -->
<!ENTITY tildeT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeT.gif&#34; ALT=&#34;tilde T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde T -->
<!ENTITY tildeTheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeTheta.gif&#34; ALT=&#34;tilde Theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Theta -->
<!ENTITY tildeU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeU.gif&#34; ALT=&#34;tilde U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde U -->
<!ENTITY tildeUpsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeUpsilon.gif&#34; ALT=&#34;tilde Upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Upsilon -->
<!ENTITY tildeV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeV.gif&#34; ALT=&#34;tilde V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde V -->
<!ENTITY tildeW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeW.gif&#34; ALT=&#34;tilde W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde W -->
<!ENTITY tildeX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeX.gif&#34; ALT=&#34;tilde X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde X -->
<!ENTITY tildeXi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeXi.gif&#34; ALT=&#34;tilde Xi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Xi -->
<!ENTITY tildeY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeY.gif&#34; ALT=&#34;tilde Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Y -->
<!ENTITY tildeZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeZ.gif&#34; ALT=&#34;tilde Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde Z -->
<!ENTITY tildea "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildea.gif&#34; ALT=&#34;tilde a&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde a -->
<!ENTITY tildealpha "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildealpha.gif&#34; ALT=&#34;tilde alpha&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde alpha -->
<!ENTITY tildeb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeb.gif&#34; ALT=&#34;tilde b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde b -->
<!ENTITY tildebeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildebeta.gif&#34; ALT=&#34;tilde beta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde beta -->
<!ENTITY tildec "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildec.gif&#34; ALT=&#34;tilde c&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde c -->
<!ENTITY tildechi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildechi.gif&#34; ALT=&#34;tilde chi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde chi -->
<!ENTITY tilded "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilded.gif&#34; ALT=&#34;tilde d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde d -->
<!ENTITY tildedelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildedelta.gif&#34; ALT=&#34;tilde delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde delta -->
<!ENTITY tildee "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildee.gif&#34; ALT=&#34;tilde e&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde e -->
<!ENTITY tildeepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeepsilon.gif&#34; ALT=&#34;tilde epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde epsilon -->
<!ENTITY tildeeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeeta.gif&#34; ALT=&#34;tilde eta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde eta -->
<!ENTITY tildef "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildef.gif&#34; ALT=&#34;tilde f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde f -->
<!ENTITY tildeg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeg.gif&#34; ALT=&#34;tilde g&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde g -->
<!ENTITY tildegamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildegamma.gif&#34; ALT=&#34;tilde gamma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde gamma -->
<!ENTITY tildeh "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeh.gif&#34; ALT=&#34;tilde h&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde h -->
<!ENTITY tildei "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildei.gif&#34; ALT=&#34;tilde i&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde i -->
<!ENTITY tildeiota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeiota.gif&#34; ALT=&#34;tilde iota&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde iota -->
<!ENTITY tildej "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildej.gif&#34; ALT=&#34;tilde j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde j -->
<!ENTITY tildek "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildek.gif&#34; ALT=&#34;tilde k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde k -->
<!ENTITY tildekappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildekappa.gif&#34; ALT=&#34;tilde kappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde kappa -->
<!ENTITY tildel "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildel.gif&#34; ALT=&#34;tilde l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde l -->
<!ENTITY tildelambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildelambda.gif&#34; ALT=&#34;tilde lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde lambda -->
<!ENTITY tildem "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildem.gif&#34; ALT=&#34;tilde m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde m -->
<!ENTITY tildemu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildemu.gif&#34; ALT=&#34;tilde mu&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde mu -->
<!ENTITY tilden "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilden.gif&#34; ALT=&#34;tilde n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde n -->
<!ENTITY tildenu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildenu.gif&#34; ALT=&#34;tilde nu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde nu -->
<!ENTITY tildeo "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeo.gif&#34; ALT=&#34;tilde o&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde o -->
<!ENTITY tildeomega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeomega.gif&#34; ALT=&#34;tilde omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde omega -->
<!ENTITY tildep "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildep.gif&#34; ALT=&#34;tilde p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde p -->
<!ENTITY tildephi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildephi.gif&#34; ALT=&#34;tilde phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde phi -->
<!ENTITY tildepi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildepi.gif&#34; ALT=&#34;tilde pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde pi -->
<!ENTITY tildepsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildepsi.gif&#34; ALT=&#34;tilde psi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde psi -->
<!ENTITY tildeq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeq.gif&#34; ALT=&#34;tilde q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde q -->
<!ENTITY tilder "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilder.gif&#34; ALT=&#34;tilde r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde r -->
<!ENTITY tilderho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tilderho.gif&#34; ALT=&#34;tilde rho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde rho -->
<!ENTITY tildes "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildes.gif&#34; ALT=&#34;tilde s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde s -->
<!ENTITY tildesigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildesigma.gif&#34; ALT=&#34;tilde sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde sigma -->
<!ENTITY tildet "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildet.gif&#34; ALT=&#34;tilde t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde t -->
<!ENTITY tildetau "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildetau.gif&#34; ALT=&#34;tilde tau&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde tau -->
<!ENTITY tildetheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildetheta.gif&#34; ALT=&#34;tilde theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde theta -->
<!ENTITY tildeu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeu.gif&#34; ALT=&#34;tilde u&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde u -->
<!ENTITY tildeupsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildeupsilon.gif&#34; ALT=&#34;tilde upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde upsilon -->
<!ENTITY tildev "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildev.gif&#34; ALT=&#34;tilde v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde v -->
<!ENTITY tildevarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevarepsilon.gif&#34; ALT=&#34;tilde varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde varepsilon -->
<!ENTITY tildevarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevarphi.gif&#34; ALT=&#34;tilde varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde varphi -->
<!ENTITY tildevarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevarpi.gif&#34; ALT=&#34;tilde varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde varpi -->
<!ENTITY tildevarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevarrho.gif&#34; ALT=&#34;tilde varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde varrho -->
<!ENTITY tildevarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevarsigma.gif&#34; ALT=&#34;tilde varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde varsigma -->
<!ENTITY tildevartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildevartheta.gif&#34; ALT=&#34;tilde vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde vartheta -->
<!ENTITY tildew "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildew.gif&#34; ALT=&#34;tilde w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde w -->
<!ENTITY tildex "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildex.gif&#34; ALT=&#34;tilde x&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde x -->
<!ENTITY tildexi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildexi.gif&#34; ALT=&#34;tilde xi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde xi -->
<!ENTITY tildey "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildey.gif&#34; ALT=&#34;tilde y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde y -->
<!ENTITY tildez "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildez.gif&#34; ALT=&#34;tilde z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- tilde z -->
<!ENTITY tildezeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/tildezeta.gif&#34; ALT=&#34;tilde zeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- tilde zeta -->
<!ENTITY times "&#x00D7;">	<!-- multiply sign -->
<!ENTITY timesb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/timesb.gif&#34; ALT=&#34;timesb&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- multiply sign in box -->
<!ENTITY to "&#x2192;">	<!-- right arrow -->
<!ENTITY top "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/top.gif&#34; ALT=&#34;top&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- top -->
<!ENTITY tprime "&#x2034;">	<!-- triple prime -->
<!ENTITY tr "tr">	<!-- Upright &#34;tr&#34; for trace -->
<!ENTITY trade "&#x2122;">	<!-- trade mark sign -->
<!ENTITY trademark "&#x2122;">	<!-- trademark -->
<!ENTITY triangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/triangle.gif&#34; ALT=&#34;triangle&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Triangle -->
<!ENTITY triangledown "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/triangledown.gif&#34; ALT=&#34;triangledown&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- down triangle -->
<!ENTITY triangleleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/triangleleft.gif&#34; ALT=&#34;triangleleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Left pointing triangle -->
<!ENTITY trianglelefteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/trianglelefteq.gif&#34; ALT=&#34;trianglelefteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triangle left or equal -->
<!ENTITY triangleq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/triangleq.gif&#34; ALT=&#34;triangleq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- equals with triangle above -->
<!ENTITY triangleright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/triangleright.gif&#34; ALT=&#34;triangleright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Right pointing triangle -->
<!ENTITY trianglerighteq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/trianglerighteq.gif&#34; ALT=&#34;trianglerighteq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triangle right or equal -->
<!ENTITY trie "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/trie.gif&#34; ALT=&#34;trie&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- triangle, equals -->
<!ENTITY tscy "&#x0446;">	<!-- CYRILLIC SMALL LETTER TSE -->
<!ENTITY tshcy "&#x045B;">	<!-- CYRILLIC SMALL LETTER TSHE -->
<!ENTITY tstrok "&#x0167;">	<!-- LATIN SMALL LETTER T WITH STROKE -->
<!ENTITY twixt "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/twixt.gif&#34; ALT=&#34;twixt&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- between -->
<!ENTITY twoheadleftarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/twoheadleftarrow.gif&#34; ALT=&#34;twoheadleftarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left 2-head arrow -->
<!ENTITY twoheadrightarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/twoheadrightarrow.gif&#34; ALT=&#34;twoheadrightarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right 2-head arrow -->
<!ENTITY uArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/uArr.gif&#34; ALT=&#34;uArr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up dbl arrow -->
<!ENTITY uacgr "&#x03CD;">	<!-- GREEK SMALL LETTER UPSILON WITH TONOS -->
<!ENTITY uacute "&#x00FA;">	<!-- LATIN SMALL LETTER U WITH ACUTE -->
<!ENTITY uarr "&#x2191;">	<!-- upward arrow -->
<!ENTITY uarr2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/uarr2.gif&#34; ALT=&#34;uarr2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- two up arrows (now uuarr) -->
<!ENTITY ubrcy "&#x045E;">	<!-- CYRILLIC SMALL LETTER SHORT U -->
<!ENTITY ubreve "&#x016D;">	<!-- LATIN SMALL LETTER U WITH BREVE -->
<!ENTITY ucedil "u&#x0327;">	<!-- u cedilla -->
<!ENTITY ucheck "&#x01D4;">	<!-- check u -->
<!ENTITY ucirc "&#x00FB;">	<!-- LATIN SMALL LETTER U WITH CIRCUMFLEX -->
<!ENTITY ucy "&#x0443;">	<!-- CYRILLIC SMALL LETTER U -->
<!ENTITY udblac "&#x0171;">	<!-- LATIN SMALL LETTER U WITH DOUBLE ACUTE -->
<!ENTITY udiagr "&#x03B0;">	<!-- GREEK SMALL LETTER UPSILON WITH DIALYTIKA AND TONOS -->
<!ENTITY udigr "&#x03CB;">	<!-- GREEK SMALL LETTER UPSILON WITH DIALYTIKA -->
<!ENTITY ugr "&#x03C5;">	<!-- GREEK SMALL LETTER UPSILON -->
<!ENTITY ugrave "&#x00F9;">	<!-- LATIN SMALL LETTER U WITH GRAVE -->
<!ENTITY uharl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/uharl.gif&#34; ALT=&#34;uharl&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up harpoon-left -->
<!ENTITY uharr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/uharr.gif&#34; ALT=&#34;uharr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up harp-r -->
<!ENTITY uhblk "&#x2580;">	<!-- upper half block -->
<!ENTITY ulcorn "&#x231C;">	<!-- upper left corner -->
<!ENTITY ulcrop "&#x230F;">	<!-- upward left crop mark -->
<!ENTITY umacr "&#x016B;">	<!-- LATIN SMALL LETTER U WITH MACRON -->
<!ENTITY uml "&#x0308;">	<!-- umlaut mark. MathML: x00A8 -->
<!ENTITY underscore "_">	<!-- underscore -->
<!ENTITY uogon "&#x0173;">	<!-- LATIN SMALL LETTER U WITH OGONEK -->
<!ENTITY uparrow "&#x2191;">	<!-- up arrow -->
<!ENTITY updownarrow "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/updownarrow.gif&#34; ALT=&#34;updownarrow&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up-down arrow -->
<!ENTITY upharpoonleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/upharpoonleft.gif&#34; ALT=&#34;upharpoonleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up harpoon left head -->
<!ENTITY upharpoonright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/upharpoonright.gif&#34; ALT=&#34;upharpoonright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up harpoon right head -->
<!ENTITY uplus "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/uplus.gif&#34; ALT=&#34;uplus&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- plus sign in union -->
<!ENTITY upsi "&#x03C5;">	<!-- small Upsilon, Greek -->
<!ENTITY upsilon "&#x03C5;">
<!ENTITY upuparrows "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/upuparrows.gif&#34; ALT=&#34;upuparrows&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up arrow pair -->
<!ENTITY uranus "&#x2645;">	<!-- Uranus symbol -->
<!ENTITY urcorn "&#x231D;">	<!-- upper right corner -->
<!ENTITY urcrop "&#x230E;">	<!-- upward right crop mark -->
<!ENTITY uring "&#x016F;">	<!-- LATIN SMALL LETTER U WITH RING ABOVE -->
<!ENTITY utilde "&#x0169;">	<!-- LATIN SMALL LETTER U WITH TILDE -->
<!ENTITY utri "&#x25B5;">	<!-- up triangle, open -->
<!ENTITY utrif "&#x25B4;">	<!-- up tri, filled -->
<!ENTITY uuml "&#x00FC;">	<!-- LATIN SMALL LETTER U WITH DIAERESIS -->
<!ENTITY vArr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vArr.gif&#34; ALT=&#34;vArr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up&down dbl arrow -->
<!ENTITY vDash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vDash.gif&#34; ALT=&#34;vDash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vertical, dbl dash -->
<!ENTITY varepsilon "&#x03B5;">	<!-- curly epsilon -->
<!ENTITY varkappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varkappa.gif&#34; ALT=&#34;varkappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- variant kappa -->
<!ENTITY varnothing "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varnothing.gif&#34; ALT=&#34;varnothing&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- diameter -->
<!ENTITY varphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varphi.gif&#34; ALT=&#34;varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- Bold Greek letters -->
<!ENTITY varpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varpi.gif&#34; ALT=&#34;varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY varpropto "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varpropto.gif&#34; ALT=&#34;varpropto&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- proportional to variant -->
<!ENTITY varr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varr.gif&#34; ALT=&#34;varr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- up&down arrow -->
<!ENTITY varrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varrho.gif&#34; ALT=&#34;varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY varsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsigma.gif&#34; ALT=&#34;varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">
<!ENTITY varsubsetneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsubsetneq.gif&#34; ALT=&#34;varsubsetneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset over single not eq var -->
<!ENTITY varsubsetneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsubsetneqq.gif&#34; ALT=&#34;varsubsetneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- subset over double not eq var -->
<!ENTITY varsupsetneq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsupsetneq.gif&#34; ALT=&#34;varsupsetneq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset over single not eq var -->
<!ENTITY varsupsetneqq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/varsupsetneqq.gif&#34; ALT=&#34;varsupsetneqq&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- superset over double not eq var -->
<!ENTITY vartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vartheta.gif&#34; ALT=&#34;vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">
<!ENTITY vartriangle "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vartriangle.gif&#34; ALT=&#34;vartriangle&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- var triangle -->
<!ENTITY vartriangleleft "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vartriangleleft.gif&#34; ALT=&#34;vartriangleleft&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- left var triangle -->
<!ENTITY vartriangleright "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vartriangleright.gif&#34; ALT=&#34;vartriangleright&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- right var triangle -->
<!ENTITY vbreve "v&#x0306;">	<!-- breve v -->
<!ENTITY vcedil "v&#x0327;">	<!-- v cedilla -->
<!ENTITY vcheck "v&#x030C;">	<!-- check v -->
<!ENTITY vcy "&#x0432;">	<!-- CYRILLIC SMALL LETTER VE -->
<!ENTITY vdash "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vdash.gif&#34; ALT=&#34;vdash&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vertical, dash -->
<!ENTITY vec0 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec0.gif&#34; ALT=&#34;vec 0&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 0 -->
<!ENTITY vec1 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec1.gif&#34; ALT=&#34;vec 1&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 1 -->
<!ENTITY vec2 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec2.gif&#34; ALT=&#34;vec 2&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 2 -->
<!ENTITY vec3 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec3.gif&#34; ALT=&#34;vec 3&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 3 -->
<!ENTITY vec4 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec4.gif&#34; ALT=&#34;vec 4&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 4 -->
<!ENTITY vec5 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec5.gif&#34; ALT=&#34;vec 5&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 5 -->
<!ENTITY vec6 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec6.gif&#34; ALT=&#34;vec 6&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 6 -->
<!ENTITY vec7 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec7.gif&#34; ALT=&#34;vec 7&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 7 -->
<!ENTITY vec8 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec8.gif&#34; ALT=&#34;vec 8&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 8 -->
<!ENTITY vec9 "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vec9.gif&#34; ALT=&#34;vec 9&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec 9 -->
<!ENTITY vecA "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecA.gif&#34; ALT=&#34;vec A&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec A -->
<!ENTITY vecB "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecB.gif&#34; ALT=&#34;vec B&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec B -->
<!ENTITY vecC "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecC.gif&#34; ALT=&#34;vec C&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec C -->
<!ENTITY vecD "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecD.gif&#34; ALT=&#34;vec D&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec D -->
<!ENTITY vecE "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecE.gif&#34; ALT=&#34;vec E&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec E -->
<!ENTITY vecF "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecF.gif&#34; ALT=&#34;vec F&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec F -->
<!ENTITY vecG "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecG.gif&#34; ALT=&#34;vec G&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec G -->
<!ENTITY vecH "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecH.gif&#34; ALT=&#34;vec H&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec H -->
<!ENTITY vecI "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecI.gif&#34; ALT=&#34;vec I&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec I -->
<!ENTITY vecJ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecJ.gif&#34; ALT=&#34;vec J&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec J -->
<!ENTITY vecK "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecK.gif&#34; ALT=&#34;vec K&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec K -->
<!ENTITY vecL "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecL.gif&#34; ALT=&#34;vec L&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec L -->
<!ENTITY vecM "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecM.gif&#34; ALT=&#34;vec M&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec M -->
<!ENTITY vecN "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecN.gif&#34; ALT=&#34;vec N&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec N -->
<!ENTITY vecO "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecO.gif&#34; ALT=&#34;vec O&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec O -->
<!ENTITY vecP "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecP.gif&#34; ALT=&#34;vec P&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec P -->
<!ENTITY vecQ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecQ.gif&#34; ALT=&#34;vec Q&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec Q -->
<!ENTITY vecR "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecR.gif&#34; ALT=&#34;vec R&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec R -->
<!ENTITY vecS "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecS.gif&#34; ALT=&#34;vec S&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec S -->
<!ENTITY vecT "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecT.gif&#34; ALT=&#34;vec T&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec T -->
<!ENTITY vecU "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecU.gif&#34; ALT=&#34;vec U&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec U -->
<!ENTITY vecV "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecV.gif&#34; ALT=&#34;vec V&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec V -->
<!ENTITY vecW "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecW.gif&#34; ALT=&#34;vec W&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec W -->
<!ENTITY vecX "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecX.gif&#34; ALT=&#34;vec X&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec X -->
<!ENTITY vecY "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecY.gif&#34; ALT=&#34;vec Y&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec Y -->
<!ENTITY vecZ "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecZ.gif&#34; ALT=&#34;vec Z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec Z -->
<!ENTITY veca "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veca.gif&#34; ALT=&#34;vec a&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec a -->
<!ENTITY vecalpha "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecalpha.gif&#34; ALT=&#34;vec alpha&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec alpha -->
<!ENTITY vecb "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecb.gif&#34; ALT=&#34;vec b&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec b -->
<!ENTITY vecbeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecbeta.gif&#34; ALT=&#34;vec beta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec beta -->
<!ENTITY vecc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecc.gif&#34; ALT=&#34;vec c&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec c -->
<!ENTITY vecchi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecchi.gif&#34; ALT=&#34;vec chi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec chi -->
<!ENTITY vecd "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecd.gif&#34; ALT=&#34;vec d&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec d -->
<!ENTITY vecdelta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecdelta.gif&#34; ALT=&#34;vec delta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec delta -->
<!ENTITY vece "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vece.gif&#34; ALT=&#34;vec e&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec e -->
<!ENTITY vecell "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecell.gif&#34; ALT=&#34;vec ell&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec ell -->
<!ENTITY vecepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecepsilon.gif&#34; ALT=&#34;vec epsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec epsilon -->
<!ENTITY veceta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veceta.gif&#34; ALT=&#34;vec eta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec eta -->
<!ENTITY vecf "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecf.gif&#34; ALT=&#34;vec f&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec f -->
<!ENTITY vecg "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecg.gif&#34; ALT=&#34;vec g&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec g -->
<!ENTITY vecgamma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecgamma.gif&#34; ALT=&#34;vec gamma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec gamma -->
<!ENTITY vech "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vech.gif&#34; ALT=&#34;vec h&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec h -->
<!ENTITY veci "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veci.gif&#34; ALT=&#34;vec i&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec i -->
<!ENTITY vecimath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecimath.gif&#34; ALT=&#34;vec imath&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec imath -->
<!ENTITY veciota "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veciota.gif&#34; ALT=&#34;vec iota&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec iota -->
<!ENTITY vecj "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecj.gif&#34; ALT=&#34;vec j&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec j -->
<!ENTITY vecjmath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecjmath.gif&#34; ALT=&#34;vec jmath&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec jmath -->
<!ENTITY veck "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veck.gif&#34; ALT=&#34;vec k&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec k -->
<!ENTITY veckappa "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veckappa.gif&#34; ALT=&#34;vec kappa&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec kappa -->
<!ENTITY vecl "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecl.gif&#34; ALT=&#34;vec l&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec l -->
<!ENTITY veclambda "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veclambda.gif&#34; ALT=&#34;vec lambda&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec lambda -->
<!ENTITY vecm "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecm.gif&#34; ALT=&#34;vec m&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec m -->
<!ENTITY vecmu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecmu.gif&#34; ALT=&#34;vec mu&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec mu -->
<!ENTITY vecn "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecn.gif&#34; ALT=&#34;vec n&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec n -->
<!ENTITY vecnabla "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecnabla.gif&#34; ALT=&#34;vec nabla&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec nabla -->
<!ENTITY vecnu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecnu.gif&#34; ALT=&#34;vec nu&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec nu -->
<!ENTITY veco "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veco.gif&#34; ALT=&#34;vec o&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec o -->
<!ENTITY vecomega "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecomega.gif&#34; ALT=&#34;vec omega&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec omega -->
<!ENTITY vecp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecp.gif&#34; ALT=&#34;vec p&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec p -->
<!ENTITY vecpartial "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecpartial.gif&#34; ALT=&#34;vec partial&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec partial -->
<!ENTITY vecphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecphi.gif&#34; ALT=&#34;vec phi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec phi -->
<!ENTITY vecpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecpi.gif&#34; ALT=&#34;vec pi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec pi -->
<!ENTITY vecpsi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecpsi.gif&#34; ALT=&#34;vec psi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec psi -->
<!ENTITY vecq "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecq.gif&#34; ALT=&#34;vec q&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec q -->
<!ENTITY vecr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecr.gif&#34; ALT=&#34;vec r&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec r -->
<!ENTITY vecrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecrho.gif&#34; ALT=&#34;vec rho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec rho -->
<!ENTITY vecs "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecs.gif&#34; ALT=&#34;vec s&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec s -->
<!ENTITY vecsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecsigma.gif&#34; ALT=&#34;vec sigma&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec sigma -->
<!ENTITY vect "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vect.gif&#34; ALT=&#34;vec t&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec t -->
<!ENTITY vectau "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vectau.gif&#34; ALT=&#34;vec tau&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec tau -->
<!ENTITY vectheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vectheta.gif&#34; ALT=&#34;vec theta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec theta -->
<!ENTITY vecu "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecu.gif&#34; ALT=&#34;vec u&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec u -->
<!ENTITY vecupsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecupsilon.gif&#34; ALT=&#34;vec upsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec upsilon -->
<!ENTITY vecv "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecv.gif&#34; ALT=&#34;vec v&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec v -->
<!ENTITY vecvarepsilon "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvarepsilon.gif&#34; ALT=&#34;vec varepsilon&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec varepsilon -->
<!ENTITY vecvarphi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvarphi.gif&#34; ALT=&#34;vec varphi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec varphi -->
<!ENTITY vecvarpi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvarpi.gif&#34; ALT=&#34;vec varpi&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec varpi -->
<!ENTITY vecvarrho "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvarrho.gif&#34; ALT=&#34;vec varrho&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec varrho -->
<!ENTITY vecvarsigma "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvarsigma.gif&#34; ALT=&#34;vec varsigma&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec varsigma -->
<!ENTITY vecvartheta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecvartheta.gif&#34; ALT=&#34;vec vartheta&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec vartheta -->
<!ENTITY vecw "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecw.gif&#34; ALT=&#34;vec w&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec w -->
<!ENTITY vecx "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecx.gif&#34; ALT=&#34;vec x&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec x -->
<!ENTITY vecxi "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecxi.gif&#34; ALT=&#34;vec xi&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec xi -->
<!ENTITY vecy "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecy.gif&#34; ALT=&#34;vec y&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec y -->
<!ENTITY vecz "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vecz.gif&#34; ALT=&#34;vec z&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- vec z -->
<!ENTITY veczeta "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veczeta.gif&#34; ALT=&#34;vec zeta&#34; ALIGN=&#34;ABSMIDDLE&#34; /&#62;">	<!-- vec zeta -->
<!ENTITY vee "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vee.gif&#34; ALT=&#34;vee&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Logical or -->
<!ENTITY veebar "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/veebar.gif&#34; ALT=&#34;veebar&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- logical or, bar below -->
<!ENTITY vellip "&#x22EE;">	<!-- verticle ellipsis -->
<!ENTITY venus "&#x2640;">	<!-- Venus symbol -->
<!ENTITY verbar "|">	<!-- vertical bar -->
<!ENTITY vert "|">
<!ENTITY vltri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vltri.gif&#34; ALT=&#34;vltri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- l tri, open, var -->
<!ENTITY vprop "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vprop.gif&#34; ALT=&#34;vprop&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- proportional, variant -->
<!ENTITY vrtri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/vrtri.gif&#34; ALT=&#34;vrtri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- r tri, open, var -->
<!ENTITY vsubnE "&#x2ACB;">	<!-- subset not dbl eq, var. MathML: x2ACBxFE00 -->
<!ENTITY vsubne "&#x228A;">	<!-- subset, not eq, var. Math: x228AxFE00 -->
<!ENTITY vsupnE "&#x2ACC;">	<!-- super, not dbl eq, var. MathML: x2ACCxFE00 -->
<!ENTITY vsupne "&#x228B;">	<!-- super, not eq, var. MathML: x228BxFE00 -->
<!ENTITY wbreve "w&#x0306;">	<!-- breve w -->
<!ENTITY wcedil "w&#x0327;">	<!-- w cedilla -->
<!ENTITY wcheck "w&#x030C;">	<!-- check w -->
<!ENTITY wcirc "&#x0175;">	<!-- LATIN SMALL LETTER W WITH CIRCUMFLEX -->
<!ENTITY wedge "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/wedge.gif&#34; ALT=&#34;wedge&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Logical and -->
<!ENTITY wedgeq "&#x2259;">	<!-- corresponds to (wedge, equals) -->
<!ENTITY weierp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/weierp.gif&#34; ALT=&#34;weierp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Weierstrass p -->
<!ENTITY wp "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/wp.gif&#34; ALT=&#34;wp&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Weierstrass p -->
<!ENTITY wr "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/wr.gif&#34; ALT=&#34;wr&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- Wreath product -->
<!ENTITY wreath "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/wreath.gif&#34; ALT=&#34;wreath&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- wreath product -->
<!ENTITY xbreve "x&#x0306;">	<!-- breve x -->
<!ENTITY xcedil "x&#x0327;">	<!-- x cedilla -->
<!ENTITY xcheck "x&#x030C;">	<!-- check x -->
<!ENTITY xcirc "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/xcirc.gif&#34; ALT=&#34;xcirc&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- large circle. MathML: x25EF -->
<!ENTITY xdtri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/xdtri.gif&#34; ALT=&#34;xdtri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- big dn tri, open -->
<!ENTITY xgr "&#x03BE;">	<!-- GREEK SMALL LETTER XI -->
<!ENTITY xhArr "&#x27FA;">	<!-- long l&r dbl arrow -->
<!ENTITY xharr "&#x27F7;">	<!-- long l&r arr -->
<!ENTITY xi "&#x03BE;">	<!-- small xi, Greek -->
<!ENTITY xlArr "&#x27F8;">	<!-- long l dbl arrow -->
<!ENTITY xrArr "&#x27F9;">	<!-- long rt dbl arrow -->
<!ENTITY xutri "&#60;IMG SRC=&#34;http://ej.iop.org/icons/Entities/xutri.gif&#34; ALT=&#34;xutri&#34; ALIGN=&#34;BASELINE&#34; /&#62;">	<!-- big up tri, open -->
<!ENTITY yacute "&#x00FD;">	<!-- LATIN SMALL LETTER Y WITH ACUTE -->
<!ENTITY yacy "&#x044F;">	<!-- CYRILLIC SMALL LETTER YA -->
<!ENTITY ybreve "y&#x0306;">	<!-- breve y -->
<!ENTITY ycedil "y&#x0327;">	<!-- y cedilla -->
<!ENTITY ycheck "y&#x030C;">	<!-- check y -->
<!ENTITY ycirc "&#x0177;">	<!-- LATIN SMALL LETTER Y WITH CIRCUMFLEX -->
<!ENTITY ycy "&#x044B;">	<!-- CYRILLIC SMALL LETTER YERU -->
<!ENTITY yen "&#x00A5;">	<!-- yen sign -->
<!ENTITY yicy "&#x0457;">	<!-- CYRILLIC SMALL LETTER YI -->
<!ENTITY yucy "&#x044E;">	<!-- CYRILLIC SMALL LETTER YU -->
<!ENTITY yuml "&#x00FF;">	<!-- LATIN SMALL LETTER Y WITH DIAERESIS -->
<!ENTITY zacute "&#x017A;">	<!-- LATIN SMALL LETTER Z WITH ACUTE -->
<!ENTITY zbreve "z&#x0306;">	<!-- breve z -->
<!ENTITY zcaron "&#x017E;">	<!-- LATIN SMALL LETTER Z WITH CARON -->
<!ENTITY zcedil "z&#x0327;">	<!-- z cedilla -->
<!ENTITY zcheck "&#x017E;">	<!-- check z -->
<!ENTITY zcy "&#x0437;">	<!-- CYRILLIC SMALL LETTER ZE -->
<!ENTITY zdot "&#x017C;">	<!-- LATIN SMALL LETTER Z WITH DOT ABOVE -->
<!ENTITY zdotacc "&#x017C;">	<!-- z dot -->
<!ENTITY zeta "&#x03B6;">	<!-- small zeta, Greek -->
<!ENTITY zgr "&#x03B6;">	<!-- GREEK SMALL LETTER ZETA -->
<!ENTITY zhcy "&#x0436;">	<!-- CYRILLIC SMALL LETTER ZHE -->

<!-- !!! DO NOT EDIT THIS FILE DIRECTLY !!! -->
