<?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>1870-3542</journal-id>
<journal-title><![CDATA[Revista mexicana de física E]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fís. E]]></abbrev-journal-title>
<issn>1870-3542</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-35422008000200020</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Answer to the Comment on "Continuous groups of transformations and time-dependent invariants"]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Corona-Galindo]]></surname>
<given-names><![CDATA[M.G]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gelover-Santiago]]></surname>
<given-names><![CDATA[A.L]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Nacional de Astrofísica Óptica y Electrónica  ]]></institution>
<addr-line><![CDATA[Puebla Pue]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universitario Nacional Autónoma de México Facultad de Ciencias ]]></institution>
<addr-line><![CDATA[México D. F.]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2008</year>
</pub-date>
<volume>54</volume>
<numero>2</numero>
<fpage>242</fpage>
<lpage>244</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-35422008000200020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-35422008000200020&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-35422008000200020&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper we answer to the Comment on Continuous groups of transformations and time-dependent invariants. Additionally, in order to apply Hegel's Aufhebung concept in physics, some remarks about what we consider the right way to write a "Comment" are given]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En el presente trabajo damos respuesta a los comentarios que se hicieron sobre el artículo Continuous groups of transformations and time-dependent invariants. Adicionalmente, para aplicar en física el concepto hegeliano de Aufhebung, hacemos algunas observaciones acerca de la que consideramos es la mejor manera de escribir un "Comment"]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Lie groups]]></kwd>
<kwd lng="en"><![CDATA[Lorenz group]]></kwd>
<kwd lng="en"><![CDATA[dynamical systems]]></kwd>
<kwd lng="en"><![CDATA[Noether's theorem]]></kwd>
<kwd lng="en"><![CDATA[infinitesimal transformations]]></kwd>
<kwd lng="es"><![CDATA[Grupos de Lie]]></kwd>
<kwd lng="es"><![CDATA[grupo de Lorentz]]></kwd>
<kwd lng="es"><![CDATA[sistemas dinámicos]]></kwd>
<kwd lng="es"><![CDATA[teorema de Noether]]></kwd>
<kwd lng="es"><![CDATA[transformaciones infinitesimales]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="justify"><font face="verdana" size="4">Comentarios</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="4"><b>Answer to the Comment on "Continuous groups of transformations and time&#150;dependent invariants"</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>M.G. Corona&#150;Galindo&ordf; and <b>A.L. Gelover&#150;Santiago<sup>b</sup></b></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>&ordf; Instituto Nacional de Astrof&iacute;sica &Oacute;ptica y Electr&oacute;nica, Apartado Postal 216, 72000, Puebla, Pue., M&eacute;xico.</i></font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>b</sup> Facultad de Ciencias, Universitario Nacional Aut&oacute;noma de M&eacute;xico, </i><i>Circuito Exterior S/N, Ciudad Universitaria, </i><i>04510, M&eacute;xico D. F., 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 27 de agosto de 2007    ]]></body>
<body><![CDATA[<br> Aceptado el 5 de agosto de 2008</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">In this paper we answer to the Comment on Continuous groups of transformations and time&#150;dependent invariants. Additionally, in order to apply Hegel's <i>Aufhebung </i>concept in physics, some remarks about what we consider the right way to write a "Comment" are given.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>Lie groups; Lorenz group; dynamical systems; Noether's theorem; infinitesimal transformations.</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">En el presente trabajo damos respuesta a los comentarios que se hicieron sobre el art&iacute;culo Continuous groups of transformations and time&#150;dependent invariants. Adicionalmente, para aplicar en f&iacute;sica el concepto hegeliano de <i>Aufhebung, </i>hacemos algunas observaciones acerca de la que consideramos es la mejor manera de escribir un "Comment".</font></p>     <p align="justify"><font face="verdana" size="2"><b>Descriptores: </b>Grupos de Lie; grupo de Lorentz; sistemas din&aacute;micos; teorema de Noether; transformaciones infinitesimales. </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: 02.90.+p</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmfe/v54n2/v54n2a20.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. A.L. Gelover&#150;Santiago and M.G. Corona&#150;Galindo,<i> Rev. Mex F&iacute;s. 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V&aacute;zquez Briones, <i>Cinem&aacute;tica de la Relatividad Especial, </i>UTHEA, Mexico, 1965.</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=8450049&pid=S1870-3542200800020002000007&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">8. Noether Emmy, <i>Invarianten beliebiger Differentialausdruecke, </i>Nachr. v.d. Ges. d. Wiss. zu Goettingen, (1918) S. 37.</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=8450050&pid=S1870-3542200800020002000008&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">9. J.E. Marsden and A.J. 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