<?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>S0035-001X2003000500016</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Complex functions as lumps of energy]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cova]]></surname>
<given-names><![CDATA[R.J.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Uberoi]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad del Zulia Facultad Experimental de Ciencias Departamento de Física]]></institution>
<addr-line><![CDATA[Maracaibo Zulia]]></addr-line>
<country>Venezuela</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Indian Institute of Science Supercomputer Education and Research Center Departament of Mathematics]]></institution>
<addr-line><![CDATA[Bangalore Karnataka]]></addr-line>
<country>India</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2003</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2003</year>
</pub-date>
<volume>49</volume>
<numero>5</numero>
<fpage>485</fpage>
<lpage>488</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2003000500016&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2003000500016&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2003000500016&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[We present an application of the basic mathematical concept of complex functions as topological solitons, a most interesting area of research in physics. Such application of complex theory is virtually unknow outside the community of soliton researchers.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Presentamos una aplicación del concepto matemático de funciones complejas como solitones topológicos, una interesante área de investigación en física. Dicha aplicación de la teoría compleja es prácticamente desconocida fuera del círculo de investigación solitónica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Soliton]]></kwd>
<kwd lng="en"><![CDATA[complex function]]></kwd>
<kwd lng="en"><![CDATA[topology]]></kwd>
<kwd lng="es"><![CDATA[Solitón]]></kwd>
<kwd lng="es"><![CDATA[función compleja]]></kwd>
<kwd lng="es"><![CDATA[topología]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Ense&ntilde;anza</font></p>      <p align="justify">&nbsp;</p>     <p align="center"><font face="verdana" size="4"><b>Complex functions as lumps of energy</b></font></p>      <p align="center">&nbsp;</p>     <p align="center"><font face="verdana" size="2"><b>R.J. Cova<sup>1</sup>, C. Uberoi<sup>2</sup></b></font></p>       <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><i><sup>1</sup> Departamento de F&iacute;sica, FEC, La Universidad del Zulia. Apartado 15332, Maracaibo 4005&#45;A, Venezuela,</i> e&#45;mail: <a href="mailto:rcova@luz.ve">rcova@luz.ve</a></font></p>      <p align="justify"><font face="verdana" size="2"><i><sup>2</sup> Dept. of Mathematics and Supercomputer Education and Research Center, Indian Institute of Science, Bangalore 560 012, India,</i> e&#45;mail: <a href="mailto:cuberoi@math.iisc.ernet.in">cuberoi@math.iisc.ernet.in</a></font></p>      <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2">Recibido el 3 de marzo de 2003.     ]]></body>
<body><![CDATA[<br>   Aceptado el 30 de junio de 2003.</font></p>      <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>      <p align="justify"><font face="verdana" size="2">We present an application of the basic mathematical concept of complex functions as topological solitons, a most interesting area of research in physics. Such application of complex theory is virtually unknow outside the community of soliton researchers.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Keywords:</b> Soliton; complex function; topology.</font></p>      <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>      <p align="justify"><font face="verdana" size="2">Presentamos una aplicaci&oacute;n del concepto matem&aacute;tico de funciones complejas como solitones topol&oacute;gicos, una interesante &aacute;rea de investigaci&oacute;n en f&iacute;sica. Dicha aplicaci&oacute;n de la teor&iacute;a compleja es pr&aacute;cticamente desconocida fuera del c&iacute;rculo de investigaci&oacute;n solit&oacute;nica.</font></p>      <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Solit&oacute;n; funci&oacute;n compleja; topolog&iacute;a.</font></p>      <p align="justify"><font face="verdana" size="2">PACS: 01.90.+g; 11.27.+d</font></p>      ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmf/v49n5/v49n5a16.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>      <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>      <!-- ref --><p align="justify"><font face="verdana" size="2">1. A. Lars, <i>Complex Analysis</i> (McGraw&#45;Hill, 1979)</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=8296935&pid=S0035-001X200300050001600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">2. 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