<?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>0120-419X</journal-id>
<journal-title><![CDATA[Revista Integración]]></journal-title>
<abbrev-journal-title><![CDATA[Integración - UIS]]></abbrev-journal-title>
<issn>0120-419X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Industrial de Santander]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-419X2013000100002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Integrability of a double bracket system]]></article-title>
<article-title xml:lang="es"><![CDATA[Integrabilidad de un sistema con doble conmutador]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[FELIPE]]></surname>
<given-names><![CDATA[RAÚL]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LÓPEZ REYES]]></surname>
<given-names><![CDATA[NANCY]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Centro de Investigaciones Matemáticas  ]]></institution>
<addr-line><![CDATA[Guanajuato Gto]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Antioquia Facultad de Ciencias Exactas y Naturales Instituto de Matemáticas]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2013</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>15</fpage>
<lpage>23</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-419X2013000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-419X2013000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-419X2013000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A group factorization approach is used to show the integrability of a system of infinite equations of Lax type with double bracket.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se utiliza un enfoque algebraico basado en la descomposión de grupos para mostrar la integrabilidad de un sistema de infinitas ecuaciones de Lax con doble corchete.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Lax equations]]></kwd>
<kwd lng="en"><![CDATA[Brockett hierarchy]]></kwd>
<kwd lng="en"><![CDATA[completely integrable systems]]></kwd>
<kwd lng="es"><![CDATA[Ecuación de Lax]]></kwd>
<kwd lng="es"><![CDATA[jerarquía Brockett]]></kwd>
<kwd lng="es"><![CDATA[sistema completamente integrable]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font size="2" face="Verdana">     <p align="center"><font size="4"><b><i>Integrability of a double bracket system</i></b></font></p>      <p align="center">RA&Uacute;L FELIPE<sup>a</sup>, NANCY L&Oacute;PEZ REYES<sup>b, *</sup>    <br> <sup>a</sup> Centro de Investigaciones Matem&aacute;ticas, Callej&oacute;n Jalisco s/n Mineral de Valenciana,Guanajuato, Gto., M&eacute;xico.    <br> <sup>b</sup> Universidad de Antioquia, Instituto de Matem&aacute;ticas, Facultad de Ciencias Exactas y Naturales, Medell&iacute;n, Colombia.</p> <hr>     <p align="justify"><b><i>Abstract.</i></b> A group factorization approach is used to show the integrability of a system of infinite equations of Lax type with double bracket.    <br> <i><b>Keywords:</b></i> Lax equations, Brockett hierarchy, completely integrable systems.    <br> <i><b>MSC2010:</b></i> 35Q58, 37K10</p>  <hr>     <p align="center"><font size="3"><b><i>Integrabilidad de un sistema con doble conmutador</i></b></font></p>      <p align="justify"><b>Resumen</b>. Se utiliza un enfoque algebraico basado en la descomposi&oacute;n de grupos para mostrar la integrabilidad de un sistema de infinitas ecuaciones de Lax con doble corchete.    ]]></body>
<body><![CDATA[<br> <b>Palabras claves:</b> Ecuaci&oacute;n de Lax, jerarqu&iacute;a Brockett, sistema completamente integrable.</p> <hr>     <p align="justify">Texto Completo disponible en <a href ="pdf\rein\v31n1\v31n1a02.pdf" target="_blank">PDF</a></p> <hr>     <p align="left"><font size="3"><b><i>References</i></b></font></p>      <!-- ref --><p align="justify">&#91;1&#93; Ben&iacute;tez-Babilonia L., Felipe R. and L&oacute;pez N., &quot;Algebraic analysis of a discrete hierarchy of double bracket equations&quot;, <i>Differ. Equ. Dyn. 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