<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2003000100009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Recurrence relations of special functions and group representations]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres del Castillo]]></surname>
<given-names><![CDATA[G.F.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Benemérita Universidad Autónoma de Puebla Instituto de Ciencias Departamento de Física Matemática]]></institution>
<addr-line><![CDATA[Puebla ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2003</year>
</pub-date>
<volume>49</volume>
<numero>1</numero>
<fpage>53</fpage>
<lpage>56</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2003000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2003000100009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2003000100009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[It is shown that the recurrence relations satisfied by several special functions can be related to representations of Lie algebras of dimension three or four. It is also shown that in some cases these recurrence relations can be related to the isometries of constant-curvature two-dimensional manifolds.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se muestra que las relaciones de recurrencia satisfechas por varias funciones especiales pueden relacionarse con representaciones de álgebras de Lie de dimensión tres o cuatro. Se muestra también que en algunos casos estas relaciones de recurrencia pueden relacionarse con las isometrías de variedades de dimensión dos con curvatura constante.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Special functions]]></kwd>
<kwd lng="en"><![CDATA[representations of Lie algebras]]></kwd>
<kwd lng="es"><![CDATA[Funciones especiales]]></kwd>
<kwd lng="es"><![CDATA[representaciones de álgebras de Lie]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Investigaci&oacute;n</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Recurrence relations of special functions and group representations</b></font></p>      <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>G.F. Torres del Castillo</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Departamento de F&iacute;sica Matem&aacute;tica, Instituto de Ciencias, Universidad Aut&oacute;noma de Puebla, Apartado Postal 1152, 72001 Puebla, Pue., M&eacute;xico.</i></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Recibido el 3 de septiembre de 2002.    ]]></body>
<body><![CDATA[<br> 	Aceptado el 15 de noviembre de 2002.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">It is shown that the recurrence relations satisfied by several special functions can be related to representations of Lie algebras of dimension three or four. It is also shown that in some cases these recurrence relations can be related to the isometries of constant&#45;curvature two&#45;dimensional manifolds.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Special functions; representations of Lie algebras.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Se muestra que las relaciones de recurrencia satisfechas por varias funciones especiales pueden relacionarse con representaciones de &aacute;lgebras de Lie de dimensi&oacute;n tres o cuatro. Se muestra tambi&eacute;n que en algunos casos estas relaciones de recurrencia pueden relacionarse con las isometr&iacute;as de variedades de dimensi&oacute;n dos con curvatura constante.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Descriptores:</b> Funciones especiales; representaciones de &aacute;lgebras de Lie.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">PACS: 02.30.Gp; 02.20.&#45;a; 02.40.Ky</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><a href="../pdf/rmf/v49n1/v49n1a9.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">1.&nbsp;N.Ja. Vilenkin and A.U. Klimyk, <i>Representations of Lie Groups and Special Functions,</i> Vol. 1, (Kluwer, Dordrecht, 1991).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292947&pid=S0035-001X200300010000900001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">2.&nbsp;W.&#45;K. Tung, <i>Group Theory in Physics,</i> (World Scientific, Singapore, 1985).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292949&pid=S0035-001X200300010000900002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">3.&nbsp;N.N. Lebedev, <i>Special Functions and their Applications,</i> (Prentice&#45;Hall, Englewood Cliffs, N.J., 1965) (Dover, New York, reprinted 1972).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292951&pid=S0035-001X200300010000900003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">4.&nbsp;G. Szeg&ouml;, <i>Orthogonal Polynomials,</i> revised edition, (American Mathematical Society, Providence, Rhode Island, 1959).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292953&pid=S0035-001X200300010000900004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">5.&nbsp;H. Hochstadt, <i>The Functions of Mathematical Physics,</i> (Wiley, New York, 1971) (Dover, New York, reprinted 1986).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292955&pid=S0035-001X200300010000900005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">6.&nbsp;E. Pi&ntilde;a, <i>Rev. Mex. F&iacute;s. <b>41</b></i> (1995) 913.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8292957&pid=S0035-001X200300010000900006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>      ]]></body><back>
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</article>
