<?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>S0120-419X2014000200005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Una descomposición convexa]]></article-title>
<article-title xml:lang="en"><![CDATA[A convex decomposition]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LOMELÍ-HARO]]></surname>
<given-names><![CDATA[MARIO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[BORJA M]]></surname>
<given-names><![CDATA[VERÓNICA]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[HERNÁNDEZ T.]]></surname>
<given-names><![CDATA[J. ALEJANDRO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Tecnológica de la Mixteca Instituto de Física y Matemáticas ]]></institution>
<addr-line><![CDATA[Huajuapan de León Oaxaca]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2014</year>
</pub-date>
<volume>32</volume>
<numero>2</numero>
<fpage>169</fpage>
<lpage>180</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-419X2014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-419X2014000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-419X2014000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Dada una colección P de puntos en el plano, una descomposición convexa de P es un conjunto &Gamma; de polígonos convexos con vértices en P que satisfacen lo siguiente: La unión de todos los elementos de ­ es el cierre convexo de P, cada elemento de &Gamma; es vacío (no contiene a ningún otro elemento de P en su interior) y para cualesquiera 2 elementos diferentes en &Gamma; sus interiores son disjuntos (se intersecarán en a lo más una arista). Únicamente se sabe que existen descomposiciones convexas con a lo más <img width=22 height=27 src="img/revistas/rein/v32n2/v32n2a05f1.jpg">elementos para toda colección de n puntos. En este trabajo diremos cómo obtener una descomposición convexa específica de P con a lo más <img width=25 height=32 src="img/revistas/rein/v32n2/v32n2a05f2.jpg">elementos]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Given a point set P on the plane, a convex decomposition of P is a set ­ of convex polygons with vertices inP satisfying the following conditions: The union of all elements in ­ is the convex hull ofP, every element in ­ is empty (that is, they no contain any element of P in its interior), and any given 2 elements in ­ its interiors are disjoint intersecting them in at most one edge. It is known that if P has n elements, then there exists a convex decomposition of P with at most <img width=22 height=27 src="img/revistas/rein/v32n2/v32n2a05f1.jpg">elements. In this work we give a procedure to find a specific convex decomposition of P with at most <img width=25 height=32 src="img/revistas/rein/v32n2/v32n2a05f2.jpg">elements]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Aristas girables en triangulaciones]]></kwd>
<kwd lng="es"><![CDATA[descomposiciones convexas]]></kwd>
<kwd lng="es"><![CDATA[triangulaciones]]></kwd>
<kwd lng="en"><![CDATA[Flipping edges in triangulations]]></kwd>
<kwd lng="en"><![CDATA[convex decompositions]]></kwd>
<kwd lng="en"><![CDATA[triangulations]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   <font size="2" face="Verdana">     <p align="center"><font size="4"><i><b>Una descomposici&oacute;n convexa</b></i></font></p>      <p align="center">MARIO LOMEL&Iacute;-HARO<sup>*</sup>, VER&Oacute;NICA BORJA M.,    <br> J. ALEJANDRO HERN&Aacute;NDEZ T.     <br>    <br> Universidad Tecnol&oacute;gica de la Mixteca, Instituto de F&iacute;sica y Matem&aacute;ticas, Huajuapan de Le&oacute;n, Oaxaca, M&eacute;xico.</p>  <hr>      <p align="justify"><b><i>Resumen.</i></b> Dada una colecci&oacute;n <i>P</i> de puntos en el plano, una descomposici&oacute;n convexa de <i>P</i> es un conjunto &Gamma; de pol&iacute;gonos convexos con v&eacute;rtices en <i>P</i> que satisfacen lo siguiente: La uni&oacute;n de todos los elementos de  es el cierre convexo de <i>P</i>, cada elemento de &Gamma; es vac&iacute;o (no contiene a ning&uacute;n otro elemento de <i>P</i> en su interior) y para cualesquiera 2 elementos diferentes en &Gamma; sus interiores son disjuntos (se intersecar&aacute;n en a lo m&aacute;s una arista). &Uacute;nicamente se sabe que existen descomposiciones convexas con a lo m&aacute;s <img src="img/revistas/rein/v32n2/v32n2a05f1.jpg"> elementos para toda colecci&oacute;n de <i>n</i> puntos. En este trabajo diremos c&oacute;mo obtener una descomposici&oacute;n convexa espec&iacute;fica de <i>P</i> con a lo m&aacute;s <img src="img/revistas/rein/v32n2/v32n2a05f2.jpg"> elementos.</p>      <p align="left"><b><i>Palabras claves:</i></b> Aristas girables en triangulaciones, descomposiciones convexas, triangulaciones    <br> <b><i>MSC2010:</i></b> 68U05, 68R05, 68R10.</p> <hr>      <p align="center"><font size="3"><b><i>A convex decomposition</i></b></font></p>      ]]></body>
<body><![CDATA[<p align="justify"><b><i>Abstract.</i></b>. Given a point set P on the plane, a convex decomposition of <i>P</i> is a set  of convex polygons with vertices in<i>P</i> satisfying the following conditions: The union of all elements in  is the convex hull of<i>P</i>, every element in  is empty (that is, they no contain any element of <i>P</i> in its interior), and any given 2 elements in  its interiors are disjoint intersecting them in at most one edge. It is known that if <i>P</i> has <i>n</i> elements, then there exists a convex decomposition of P with at most <img src="img/revistas/rein/v32n2/v32n2a05f1.jpg"> elements. In this work we give a procedure to find a specific convex decomposition of P with at most <img src="img/revistas/rein/v32n2/v32n2a05f2.jpg"> elements.</p>       <p align="left"><b><i>Keywords:</i></b> Flipping edges in triangulations, convex decompositions, triangulations.</p>  <hr>      <p align="justify">Texto Completo disponible en <a href ="pdf\rein\v32n2\v32n2a05.pdf" target="_blank">PDF</a></p> <hr>     <p align="left"><font size="3"><b><i>Referencias</i></b></font></p>      <!-- ref --><p align="justify">&#91;1&#93; Aichholzer O. and Krasser H., &quot;The point set order type data base: A collection of applications and results&quot;, in <i>Proc. 13th Canadian Conference on Computational Geometry</i>, Waterloo, Ontario, Canada, (2001), 17-20.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000017&pid=S0120-419X201400020000500001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>      <!-- ref --><p align="justify">&#91;2&#93; Bon&aacute; M., <i>A Walk Through Combinatorics. An Introduction to Enumeration and Graph Theory</i>, World Scientific, 2006.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000019&pid=S0120-419X201400020000500002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>      <!-- ref --><p align="justify">&#91;3&#93; Cormen T., Leiserson C.E., Rivest R.L. and Stein C., <i>Introduction to Algorithms</i>, McGrraw- Hill, Boston, 2001.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000021&pid=S0120-419X201400020000500003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>      ]]></body>
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<body><![CDATA[<!-- ref --><p align="justify">&#91;14&#93; Urrutia J., &quot;Open-problem session&quot;, in <i>10th Canadian Conference on Computational Geometry</i>, Montreal, Canada, (1998).    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000043&pid=S0120-419X201400020000500014&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p> <hr>      <p align="justify"><sup>*</sup>E-mail: <a href="mailto:lomeli@mixteco.utm.mx">lomeli@mixteco.utm.mx</a>.    <br> Recibido: 07 de diciembre de 2013, Aceptado: 06 de agosto de 2014.    <br> Para citar este art&iacute;culo: M. Lomel&iacute;-Haro, V. Borja, J.A. Hern&aacute;ndez, Una descomposici&oacute;n convexa,    <br> <i>Rev. Integr. Temas Mat.</i> 32 (2014), no. 2, 169-180.</p>  </font>      ]]></body><back>
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