<?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>S0034-74262011000100006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Embedded CMC Hypersurfaces on Hyperbolic Spaces]]></article-title>
<article-title xml:lang="es"><![CDATA[Hipersuperficies encajadas con CMC en el espacio hiperbólico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PERDOMO]]></surname>
<given-names><![CDATA[OSCAR]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Central Connecticut State University  ]]></institution>
<addr-line><![CDATA[New Britain ]]></addr-line>
<country>United States</country>
</aff>
<pub-date pub-type="pub">
<day>15</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>15</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>45</volume>
<numero>1</numero>
<fpage>81</fpage>
<lpage>96</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74262011000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74262011000100006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74262011000100006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper we will prove that for every integer n>1, there exists a real number H0<-1 such that every H&isin; (-&infin;,H0) can be realized as the mean curvature of an embedding of Hn-1\times S¹ in the n+1-dimensional space Hn+1. For n=2 we explicitly compute the value H0. For a general value n, we provide a function &xi;n defined on (-&infin;,-1), which is easy to compute numerically, such that, if &xi;n(H)>-2&pi;, then, H can be realized as the mean curvature of an embedding of Hn-1\times S¹ in the (n+1)-dimensional space Hn+1.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este artículo demostramos que para cada número entero n>1, existe un número real H0<-1, tal que todo H&isin; (-&infin;,H0) puede obtenerse como la curvatura media de un encaje de la variedad Hn-1\times S¹ en el espacio hiperbólico n+1 dimensional Hn+1. Para n=2 calcularemos explícitamente el valor H0. Para otros valores de n, daremos una función &xi;n definida en el intervalo (-&infin;,-1), la cual es fácil de calcular numéricamente, con la propiedad de que si &xi;n(H)>-2&pi;, entonces el número H puede obtenerse como la curvatura media de un encaje de la variedad Hn-1\times S¹ en el espacio hiperbólico n+1 dimensional Hn+1.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Principal curvatures]]></kwd>
<kwd lng="en"><![CDATA[Hyperbolic spaces]]></kwd>
<kwd lng="en"><![CDATA[Constant mean curvature]]></kwd>
<kwd lng="en"><![CDATA[CMC]]></kwd>
<kwd lng="en"><![CDATA[Embeddings]]></kwd>
<kwd lng="es"><![CDATA[Curvaturas principales]]></kwd>
<kwd lng="es"><![CDATA[espacio hiperbólico]]></kwd>
<kwd lng="es"><![CDATA[curvatura media constante]]></kwd>
<kwd lng="es"><![CDATA[CMC]]></kwd>
<kwd lng="es"><![CDATA[encajes]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ 
<font size="2" face="verdana">

    <p>
<b>
<font size="4">
    <center>
Embedded CMC Hypersurfaces on Hyperbolic Spaces
</center>
</font>
</b>
</p>

    <p>
<b>
<font size="3">
    <center>
Hipersuperficies encajadas con CMC en el espacio hiperb&oacute;lico
</center>
</font>
</b>
</p>

    <p>
    <center>
OSCAR PERDOMO<sup>1</sup>
</center>
</p>

    <p>
<sup>1</sup>Central Connecticut State University, New Britain, United States. Email: <a href="mailto:perdomoosm@ccsu.edu">perdomoosm@ccsu.edu</a>
    <br>
</p>

<hr size="1">

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

    <p>
In this paper we will prove that for every integer <i>n&gt;1</i>, there exists a real number <i>H<sub>0</sub>&lt;-1</i> such that every <i>H&isin; (-&infin;,H<sub>0</sub>)</i> can be realized as the mean curvature of an embedding of <i>H<sup>n-1</sup>\times S<sup>1</sup></i> in the <i>n+1</i>-dimensional space <i>H<sup>n+1</sup></i>. For <i>n=2</i> we explicitly compute the value <i>H<sub>0</sub></i>. For a general value <i>n</i>, we provide a function <i>&xi;<sub>n</sub></i> defined on <i>(-&infin;,-1)</i>, which is easy to compute numerically, such that, if <i>&xi;<sub>n</sub>(H)&gt;-2&pi;</i>, then, <i>H</i> can be realized as the mean curvature of an embedding of <i>H<sup>n-1</sup>\times S<sup>1</sup></i> in the <i>(n+1)</i>-dimensional space <i>H<sup>n+1</sup></i>.
</p>

    <p>
<b>
Key words:
</b>
Principal curvatures,
Hyperbolic spaces,
Constant mean curvature,
CMC,
Embeddings.
</p>

<hr size="1">

<i>2000 Mathematics Subject Classification: 58A10, 53C42.</i>

<hr size="1">

    <p>
<b>
    <center>
Resumen
</center>
</b>
</p>

    <p>
En este art&iacute;culo demostramos que para cada n&uacute;mero entero <i>n&gt;1</i>, existe un n&uacute;mero real <i>H<sub>0</sub>&lt;-1</i>, tal que todo <i>H&isin; (-&infin;,H<sub>0</sub>)</i> puede obtenerse como la curvatura media de un encaje de la variedad <i>H<sup>n-1</sup>\times S<sup>1</sup></i> en el espacio hiperb&oacute;lico <i>n+1</i> dimensional <i>H<sup>n+1</sup></i>. Para <i>n=2</i> calcularemos expl&iacute;citamente el valor <i>H<sub>0</sub></i>. Para otros valores de <i>n</i>, daremos una funci&oacute;n <i>&xi;<sub>n</sub></i> definida en el intervalo <i>(-&infin;,-1)</i>, la cual es f&aacute;cil de calcular num&eacute;ricamente, con la propiedad de que si <i>&xi;<sub>n</sub>(H)&gt;-2&pi;</i>, entonces el n&uacute;mero <i>H</i> puede obtenerse como la curvatura media de un encaje de la variedad <i>H<sup>n-1</sup>\times S<sup>1</sup></i> en el espacio hiperb&oacute;lico <i>n+1</i> dimensional <i>H<sup>n+1</sup></i>.
</p>

    <p>
<b>
Palabras clave:
</b>
Curvaturas principales,
espacio hiperb&oacute;lico,
curvatura media constante,
CMC,
encajes.
</p>

<hr size="1">

    <p>
Texto completo disponible en <a href="pdf/rcm/v45n1/v45n1a06.pdf">PDF</a>
</p>

<hr size="1">

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


    <!-- ref --><p>
[1] M. Do Carmo and M. Dajczer, `Rotational Hypersurfaces in Spaces of Constant Curvature´, <i>Trans. Amer. Math. Soc.</i> <i>277</i>,  (1983), 685-709.
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000022&pid=S0034-7426201100010000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref -->

    <!-- ref --><p>
[2] O. Perdomo, `Embedded Constant Mean Curvature Hypersurfaces of Spheres´, ArXiv March 10, 2009. arXiv:0903.1321
&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=S0034-7426201100010000600002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref -->

    <!-- ref --><p>
[3] I. Sterling, `A Generalization of a Theorem of Delaunay to Rotational <i>W</i>-Hypersurfaces of <i>&sigma;<sub>l</sub></i>-type in <i>H<sup>n</sup>+1</i> and <i>S<sup>n</sup>+1</i>´, <i>Pacific J. Math</i> <i>127</i>, 1 (1987), 187-197.
&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=S0034-7426201100010000600003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref -->

    <!-- ref --><p>
[4] B. Wu, `On Complete Hypersurfaces with two Principal Distinct Principal Curvatures in a Hyperbolic Space´, <i>Balkan J. Geom. Appl.</i> <i>15</i>, 2 (2010), 134-145.
&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=S0034-7426201100010000600004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref -->

    <center>
<b>(Recibido en octubre de 2010. Aceptado en abril de 2011)</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" face="verdana">
@ARTICLE{RCMv45n1a06,    <br>
 &nbsp;&nbsp;&nbsp; AUTHOR &nbsp;= {Perdomo, Oscar},    ]]></body>
<body><![CDATA[<br>
 &nbsp;&nbsp;&nbsp; TITLE &nbsp; = {{Embedded CMC Hypersurfaces on Hyperbolic Spaces}},    <br>
 &nbsp;&nbsp;&nbsp; JOURNAL = {Revista Colombiana de Matem&aacute;ticas},    <br>
&nbsp;&nbsp;&nbsp; YEAR &nbsp;&nbsp; = {2011},    <br>
&nbsp;&nbsp;&nbsp; volume &nbsp;= {45},    <br>
&nbsp;&nbsp;&nbsp; number &nbsp;= {1},    <br>
&nbsp;&nbsp;&nbsp; pages &nbsp; = {81-96}    <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[Do Carmo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Dajczer]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`Rotational Hypersurfaces in Spaces of Constant Curvature´]]></article-title>
<source><![CDATA[Trans. Amer. Math. Soc.]]></source>
<year>1983</year>
<volume>277</volume>
<page-range>685-709</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perdomo]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[`Embedded Constant Mean Curvature Hypersurfaces of Spheres´]]></source>
<year>2009</year>
</nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sterling]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`A Generalization of a Theorem of Delaunay to Rotational W-Hypersurfaces of \sigma l-type in Hn+1 and Sn+1´]]></article-title>
<source><![CDATA[Pacific J. Math]]></source>
<year>1987</year>
<volume>127</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>187-197</page-range></nlm-citation>
</ref>
<ref id="B4">
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<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang="en"><![CDATA[`On Complete Hypersurfaces with two Principal Distinct Principal Curvatures in a Hyperbolic Space´]]></article-title>
<source><![CDATA[Balkan J. Geom. Appl.]]></source>
<year>2010</year>
<volume>15</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>134-145</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
