<?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>S0034-74262007000200007</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[The cohomology solution and the index theorem on ring surfaces of genus g]]></article-title>
<article-title xml:lang="es"><![CDATA[La solución cohomológica y el teorema del índice para superficies sobre anillos de género g]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[XUE]]></surname>
<given-names><![CDATA[CHANGFENG]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[TAN]]></surname>
<given-names><![CDATA[WENCHANG]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Yancheng Institute of Technology  ]]></institution>
<addr-line><![CDATA[Yancheng ]]></addr-line>
<country>China</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Peking University  ]]></institution>
<addr-line><![CDATA[Peking ]]></addr-line>
<country>China</country>
</aff>
<pub-date pub-type="pub">
<day>15</day>
<month>12</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>15</day>
<month>12</month>
<year>2007</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>371</fpage>
<lpage>380</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74262007000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74262007000200007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74262007000200007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper, some basic properties of the cohomology solution on ring surfaces of genus g are presented, and the theorem of Dolbeault and the theorem of Serre for the operator <img src="img\revistas\rcm\v41n2\v41n2a07f1.gif" align="middle"> are obtained. The index theorem on such ring surfaces of genus g is also discussed.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este artículo se presentan algunas propiedades básicas de la solución cohomológica para superficies sobre anillos de género g y se obtienen los teoremas de Dolbeault y Serre para el operador <img src="img\revistas\rcm\v41n2\v41n2a07f1.gif" align="middle">. Se discute el teorema del índice para tales superficies.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Ring surface]]></kwd>
<kwd lng="en"><![CDATA[cohomology]]></kwd>
<kwd lng="en"><![CDATA[genus]]></kwd>
<kwd lng="en"><![CDATA[index]]></kwd>
<kwd lng="es"><![CDATA[Superficie sobre anillos]]></kwd>
<kwd lng="es"><![CDATA[cohomología]]></kwd>
<kwd lng="es"><![CDATA[género]]></kwd>
<kwd lng="es"><![CDATA[índice]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ 
<font size="2" face="verdana">

    <p>
<b>
<font size="4">
    <center>
The cohomology solution and the index theorem on ring surfaces of genus g
</center>
</font>
</b>
</p>

    <p>
<b>
<font size="3">
    <center>
La  soluci&oacute;n cohomol&oacute;gica y el teorema del &iacute;ndice para superficies sobre anillos de g&eacute;nero g
</center>
</font>
</b>
</p>

    <p>
    <center>
CHANGFENG XUE<sup>1</sup>,
WENCHANG TAN<sup>2</sup>
</center>
</p>

    <p>
<sup>1</sup>Yancheng Institute of Technology, Yancheng, China. Peking University, Peking, China. Email: <a href="mailto:chfxue@gmail.com">chfxue@gmail.com</a>
    <br>

<sup>2</sup>Peking University, Peking, China. Email: <a href="mailto:tanwch@mech.pku.edu.cn">tanwch@mech.pku.edu.cn</a>
    <br>
</p>

<hr size="1">

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

    <p>
In this paper, some basic properties of the cohomology solution on ring surfaces of genus g are presented, and the theorem of Dolbeault and the theorem of Serre for the operator <img src="img\revistas\rcm\v41n2\v41n2a07f1.gif" align="middle"> are obtained. The index theorem on such ring surfaces of genus g is also discussed.
</p>

    <p>
<b>
Key words:
</b>
Ring surface,
cohomology,
genus,
index.
</p>

<hr size="1">

<i>2000 Mathematics Subject Classification: 53C21, 53C42.</i>

<hr size="1">

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

    <p>
En este art&iacute;culo se presentan algunas propiedades b&aacute;sicas de la soluci&oacute;n cohomol&oacute;gica para superficies sobre anillos de g&eacute;nero g y se obtienen los teoremas de Dolbeault y Serre para el operador <img src="img\revistas\rcm\v41n2\v41n2a07f1.gif" align="middle">. Se discute el teorema del &iacute;ndice para tales superficies.
</p>

    <p>
<b>
Palabras clave:
</b>
Superficie sobre anillos,
cohomolog&iacute;a,
g&eacute;nero,
&iacute;ndice.
</p>

<hr size="1">

    <p>
Texto completo disponible en <a href="pdf/rcm/v41n2/v41n2a07.pdf">PDF</a>
</p>

<hr size="1">

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


    ]]></body>
<body><![CDATA[<!-- ref --><p>
[1] Ahlfors, L. & Sario, L., <i>Riemann Surfaces</i>, Princeton University Press, New Jersey, United States, 1960.
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[2] Farkas, H. & Kra, I., <i>Riemann Surfaces</i>, Springer, New York, United States, 1980.
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    ]]></body>
<body><![CDATA[<!-- ref --><p>
[6] Su, J., <i>Topology of Manifold</i>, 2 edn, Wuhan University Press, Wuhan, China, 2005.
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[7] Wu, H., Lv, Y. & Chen, Z., <i>Introduction of Riemann Surfaces</i>, Science Press, Beijing, China, 1981.
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[9] Xue, C. & Tan, W., The solutions of covariant derivative equations of cross section in associated bundles. Nonlinear Analysis: Theory, Methods and Applications (in press, doi:10.1016/j.na.2007.03.033).
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000039&pid=S0034-7426200700020000700009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref -->

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[10] Zhou, B., <i>Cohomology Algebraic</i>, Science Press, Beijing, China, 1988.
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    ]]></body>
<body><![CDATA[<center>
<b>(Recibido en julio de 2007. Aceptado en septiembre de 2007)</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{XueTan07,    <br>
 &nbsp;&nbsp;&nbsp; AUTHOR = {Changfeng Xue and Wenchang Tan},    <br>
 &nbsp;&nbsp;&nbsp; TITLE =  {{The cohomology solution and the index theorem on ring surfaces of genus g}},    <br>
 &nbsp;&nbsp;&nbsp; JOURNAL =  {Revista Colombiana de Matem&aacute;ticas},    <br>
 &nbsp;&nbsp;&nbsp; YEAR =  {2007},    <br>
 &nbsp;&nbsp;&nbsp; volume =  {41},    <br>
 &nbsp;&nbsp;&nbsp; number =  {2},    <br>
 &nbsp;&nbsp;&nbsp; pages =  {371-380}    <br>
}</font></code>

<hr size="1">
</font>
    ]]></body>
<body><![CDATA[ ]]></body><back>
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</article>
