<?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>0034-7426</journal-id>
<journal-title><![CDATA[Revista Colombiana de Matemáticas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev.colomb.mat.]]></abbrev-journal-title>
<issn>0034-7426</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia y Sociedad Colombiana de Matemáticas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74262008000100004</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Clases de álgebras de Lie y subálgebras de Cartan]]></article-title>
<article-title xml:lang="en"><![CDATA[Classes of Lie's algebras and Cartan's subalgebras]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[GUTIÉRREZ GARCÍA]]></surname>
<given-names><![CDATA[ISMAEL]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[NAVARRO GUTIÉRREZ]]></surname>
<given-names><![CDATA[MANUEL]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad del Norte  ]]></institution>
<addr-line><![CDATA[Barranquilla ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad del Norte  ]]></institution>
<addr-line><![CDATA[Barranquilla ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>15</day>
<month>06</month>
<year>2008</year>
</pub-date>
<pub-date pub-type="epub">
<day>15</day>
<month>06</month>
<year>2008</year>
</pub-date>
<volume>42</volume>
<numero>1</numero>
<fpage>47</fpage>
<lpage>60</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74262008000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74262008000100004&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74262008000100004&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este trabajo abordaremos la extensión de los argumentos clásicos sobre existencia de las subálgebras de Cartan de un álgebra de Lie soluble. Se presenta además un cambio en la terminología clásica teniendo como fundamento la presentación moderna de las clases de grupos finitos solubles. Por último, se demuestra que los N-proyectores de un álgebra de Lie soluble de dimensión finita coinciden con sus subálgebras de Cartan, donde N es la clase de todas las álgebras de Lie nilpotentes.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this work we will consider the extension of the classical arguments on the existence and conjugation of the Cartan subalgebras of a soluble Lie algebra. Also, a change in the classical terminology is presented taking into account the base of the modern presentation of the finite soluble groups classes. Finally we proof that the N-projectors of a finite dimensional soluble Lie algebra coincide with its Cartan subalgebras, where N is the class of all the nilpotentes Lie algebra.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Álgebras de Lie solubles y nilpotentes]]></kwd>
<kwd lng="es"><![CDATA[subálgebras de Cartan]]></kwd>
<kwd lng="es"><![CDATA[clases de álgebras de Lie solubles y N-proyectores]]></kwd>
<kwd lng="en"><![CDATA[Soluble and nilpotent Lie Algebras]]></kwd>
<kwd lng="en"><![CDATA[Cartan subalgebras]]></kwd>
<kwd lng="en"><![CDATA[classes of soluble Lie algebrasand N-proyectores]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ 
<font size="2" face="verdana">

    <p>
<b>
<font size="4">
    <center>
Clases de &aacute;lgebras de Lie y sub&aacute;lgebras de Cartan
</center>
</font>
</b>
</p>

    <p>
<b>
<font size="3">
    <center>
Classes of Lie's algebras and Cartan's subalgebras
</center>
</font>
</b>
</p>

    <p>
    <center>
ISMAEL GUTI&Eacute;RREZ GARC&Iacute;A<sup>1</sup>, 
MANUEL NAVARRO GUTI&Eacute;RREZ<sup>2</sup>
</center>
</p>

    <p>
<sup>1</sup>Universidad del Norte, Barranquilla, Colombia. Email: <a href="mailto:isgutier@uninorte.edu.co">isgutier@uninorte.edu.co</a>
    <br>

<sup>2</sup>Universidad del Norte, Barranquilla, Colombia. Email: <a href="mailto:mnavarro@uninorte.edu.co">mnavarro@uninorte.edu.co</a>
    <br>
</p>

<hr size="1">

    ]]></body>
<body><![CDATA[<p>
<b>
    <center>
Resumen
</center>
</b>
</p>

    <p>
En este trabajo abordaremos la extensi&oacute;n de los argumentos cl&aacute;sicos sobre existencia de las sub&aacute;lgebras de Cartan de un &aacute;lgebra de Lie soluble. Se presenta adem&aacute;s un cambio en la terminolog&iacute;a cl&aacute;sica teniendo como fundamento la presentaci&oacute;n moderna de las clases de grupos finitos solubles. Por &uacute;ltimo, se demuestra que los <em>N</em>-proyectores de un &aacute;lgebra de Lie soluble de dimensi&oacute;n finita coinciden con sus sub&aacute;lgebras de Cartan, donde <em>N</em> es la clase de todas las &aacute;lgebras de Lie nilpotentes.
</p>

    <p>
<b>
Palabras clave:
</b>
&Aacute;lgebras de Lie solubles y nilpotentes,
sub&aacute;lgebras de Cartan,
clases de &aacute;lgebras de Lie solubles y <em>N</em>-proyectores.
</p>

<hr size="1">

<i>2000 Mathematics Subject Classification: 17B30.</i>

<hr size="1">

    <p>
<b>
    <center>
Abstract
</center>
</b>
</p>

    <p>
In this work we will consider the extension of the classical arguments on the existence and conjugation of the Cartan subalgebras of a soluble Lie algebra. Also, a change in the classical terminology is presented taking into account the base of the modern presentation of the finite soluble groups classes. Finally we proof that the <em>N</em>-projectors of a finite dimensional soluble Lie algebra coincide with its Cartan subalgebras, where <em>N</em> is the class of all the nilpotentes Lie algebra.
</p>

    <p>
<b>
Key words:
</b>
Soluble and nilpotent Lie Algebras,
Cartan subalgebras,
classes of soluble Lie algebrasand <em>N</em>-proyectores.
</p>

<hr size="1">

    <p>
Texto completo disponible en <a href="pdf/rcm/v42n1/v42n1a04.pdf">PDF</a>
</p>

<hr size="1">

    <p>
<b>
<font size="3">
Referencias
</font>
</b>
</p>


    ]]></body>
<body><![CDATA[<!-- ref --><p>
[1] Barnes, D., `On Cartan subalgebras of Lie algebras´, <i>Math. Zeitschr.</i> <i>101</i>,  (1967a), 350-355.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000023&pid=S0034-7426200800010000400001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[2] Barnes, D., `On the cohomology of Lie algebras´, <i>Math. Zeitschr.</i> <i>101</i>,  (1967b), 343-349.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000024&pid=S0034-7426200800010000400002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[3] Barnes, D. & Gastineau-Hills, H., `On the theory of soluble Lie algebras´, <i>Math. Zeitschr.</i> <i>106</i>,  (1968), 343-354.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000025&pid=S0034-7426200800010000400003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[4] Barnes, D. & Gutierrez, I., Notes on strong contaiment. To appear.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000026&pid=S0034-7426200800010000400004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[5] Doerk, K. & Hawkes, T., <i>Finite Soluble Groups</i>, De Gruyter Expositions in Mathematics, Walter de Gruyter, Berlin, New York, 1992.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000027&pid=S0034-7426200800010000400005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[6] Kostant, B., `On the conjugacy of real Cartan subalgebras´, <i>Proc. Nat. Acad. Sci. U. S.</i> <i>41</i>,  (1955), 967-970.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000028&pid=S0034-7426200800010000400006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p>
[7] Navarro, M., Generalizaci&oacute;n de las sub&aacute;lgebras de Cartan para &aacute;lgebras de Lie solubles de dimensi&oacute;n finita, Tesis de Maestr&iacute;a, Universidad Nacional de Colombia, Sede Medell&iacute;n, 2007.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000029&pid=S0034-7426200800010000400007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><center>
<b>(Recibido en septiembre de 2007. Aceptado en febrero de 2008)</b>
</center>
<hr size="1">

    <p>
Este art&iacute;culo se puede citar en <i>LaTeX</i> utilizando la siguiente referencia bibliogr&aacute;fica de <i>BibTeX</i>:
</p>
<code><font size="2">@ARTICLE{RCMv42n1a04,    <br>
 &nbsp;&nbsp;&nbsp; AUTHOR &nbsp;= {Guti&eacute;rrez Garc&iacute;a, Ismael and Navarro Guti&eacute;rrez, Manuel},    ]]></body>
<body><![CDATA[<br>
 &nbsp;&nbsp;&nbsp; TITLE &nbsp; = {{Clases de &aacute;lgebras de Lie y sub&aacute;lgebras de Cartan}},    <br>
 &nbsp;&nbsp;&nbsp; JOURNAL = {Revista Colombiana de Matem&aacute;ticas},    <br>
&nbsp;&nbsp;&nbsp; YEAR &nbsp;&nbsp; = {2008},    <br>
&nbsp;&nbsp;&nbsp; volume &nbsp;= {42},    <br>
&nbsp;&nbsp;&nbsp; number &nbsp;= {1},    <br>
&nbsp;&nbsp;&nbsp; pages &nbsp; = {47-60}    <br>
}</font></code>

<hr size="1">
</font>
     ]]></body><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`On Cartan subalgebras of Lie algebras´]]></article-title>
<source><![CDATA[Math. Zeitschr.]]></source>
<year>1967</year>
<month>a</month>
<volume>101</volume>
<page-range>350-355</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`On the cohomology of Lie algebras´]]></article-title>
<source><![CDATA[Math. Zeitschr.]]></source>
<year>1967</year>
<month>b</month>
<volume>101</volume>
<page-range>343-349</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Gastineau-Hills]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`On the theory of soluble Lie algebras´]]></article-title>
<source><![CDATA[Math. Zeitschr.]]></source>
<year>1968</year>
<volume>106</volume>
<page-range>343-354</page-range></nlm-citation>
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<ref id="B4">
<label>4</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Gutierrez]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Notes on strong contaiment]]></source>
<year></year>
</nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Doerk]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Hawkes]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Finite Soluble Groups]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Berlin ]]></publisher-loc>
<publisher-name><![CDATA[Walter de Gruyter]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kostant]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`On the conjugacy of real Cartan subalgebras´]]></article-title>
<source><![CDATA[Proc. Nat. Acad. Sci. U. S.]]></source>
<year>1955</year>
<volume>41</volume>
<page-range>967-970</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="">
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<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[M.]]></given-names>
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</person-group>
<source><![CDATA[Generalización de las subálgebras de Cartan para álgebras de Lie solubles de dimensión finita]]></source>
<year></year>
</nlm-citation>
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</back>
</article>
