<?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>S0034-74262014000100002</article-id>
<article-id pub-id-type="doi">10.15446/recolma.v48n1.45193</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Conexiones de Galois, transformaciones de Chu y enlaces]]></article-title>
<article-title xml:lang="en"><![CDATA[Galois Conections, Chu Mappings and Bonds]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MUÑOZ-QUIÑONES]]></surname>
<given-names><![CDATA[GERARDO]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Distrital Francisco José de Caldas  ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>15</day>
<month>06</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>15</day>
<month>06</month>
<year>2014</year>
</pub-date>
<volume>48</volume>
<numero>1</numero>
<fpage>21</fpage>
<lpage>40</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74262014000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74262014000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74262014000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En este artículo se caracterizan los enlaces (bonds) definidos por Wille, mediante unos axiomas menos rígidos que facilitan la definición de la categoría BOND. Como los enlaces generalizan las transformaciones de Chu, se presenta un funtor entre CHU y BOND que es fiel. Además, se proponen los morfismos de Galois, los cuales generalizan los enlaces y permiten crear la categoría MGI (la I indica que invierten el orden). Finalmente, se propone un método general para construir categorías de adjunciones a partir de cualquier categoría. La categoría de adjunciones generada a partir de la categoría de las conexiones de Galois que preservan el orden, denominada MGP (la P indica que preserva el orden), resulta ser equivalente a la categoría MGI.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[In this paper we characterize bonds, as defined by Wille, by employing a less rigid set of axioms thus enabling the definition of the category BOND. Since bonds generalize Chu mappings we present a faithful functor between CHU and BOND. Moreover, we propose the Galois morphisms generalizing bonds; this allows us to define the category MGI. Lastly, we suggest a general method to construct categories of adjunctions from any given category. The category of adjunctions generated from the category of order-preserving Galois connections, named MGP, turns out to be equivalent to the category MGI.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Conexiones de Galois]]></kwd>
<kwd lng="es"><![CDATA[enlaces]]></kwd>
<kwd lng="es"><![CDATA[transformaciones de Chu]]></kwd>
<kwd lng="en"><![CDATA[Galois connections]]></kwd>
<kwd lng="en"><![CDATA[Bonds]]></kwd>
<kwd lng="en"><![CDATA[Chu mappings]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="verdana">     <p><a href="http://dx.doi.org/10.15446/recolma.v48n1.45193" target="_blank">http://dx.doi.org/10.15446/recolma.v48n1.45193</a></p>     <p> <b> <font size="4">     <center> Conexiones de Galois, transformaciones de Chu y enlaces </center> </font> </b> </p>      <p> <b> <font size="3">     <center> Galois Conections, Chu Mappings and Bonds </center> </font> </b> </p>      <p>     <center> GERARDO MU&Ntilde;OZ-QUI&Ntilde;ONES<sup>1</sup> </center> </p>      <p> <sup>1</sup>Universidad Distrital Francisco Jos&eacute; de Caldas, Bogot&aacute;, Colombia. Email: <a href="mailto:gmunoz@udistrital.edu.co">gmunoz@udistrital.edu.co</a>     <br> </p>  <hr size="1">      ]]></body>
<body><![CDATA[<p> <b>     <center> Resumen </center> </b> </p>      <p> En este art&iacute;culo se caracterizan los enlaces (<em>bonds</em>) definidos por Wille, mediante unos axiomas menos r&iacute;gidos que facilitan la definici&oacute;n de la categor&iacute;a <i><b>BOND</b></i>. Como los enlaces generalizan las transformaciones de Chu, se presenta un funtor entre <i><b>CHU</b></i> y <i><b>BOND</b></i> que es fiel. Adem&aacute;s, se proponen los morfismos de Galois, los cuales generalizan los enlaces y permiten crear la categor&iacute;a <i><b>MGI</b></i> (la <i><b>I</b></i> indica que invierten el orden). Finalmente, se propone un m&eacute;todo general para construir categor&iacute;as de adjunciones a partir de cualquier categor&iacute;a. La categor&iacute;a de adjunciones generada a partir de la categor&iacute;a de las conexiones de Galois que preservan el orden, denominada <i><b>MGP</b></i> (la <i><b>P</b></i> indica que preserva el orden), resulta ser equivalente a la categor&iacute;a <i><b>MGI</b></i>. </p>      <p> <b> Palabras clave: </b> Conexiones de Galois, enlaces, transformaciones de Chu. </p>  <hr size="1">  <i>2000 Mathematics Subject Classification: 06A15.</i>  <hr size="1">      <p> <b>     <center> Abstract </center> </b> </p>      <p> In this paper we characterize <em>bonds</em>, as defined by Wille, by employing a less rigid set of axioms thus enabling the definition of the category <i><b>BOND</b></i>. Since bonds generalize Chu mappings we present a faithful functor between <i><b>CHU</b></i> and <i><b>BOND</b></i>. Moreover, we propose the Galois morphisms generalizing bonds; this allows us to define the category <i><b>MGI</b></i>. Lastly, we suggest a general method to construct categories of adjunctions from any given category. The category of adjunctions generated from the category of order-preserving Galois connections, named <i><b>MGP</b></i>, turns out to be equivalent to the category <i><b>MGI</b></i>. </p>      <p> <b> Key words: </b> Galois connections, Bonds, Chu mappings. </p>  <hr size="1">      <p> Texto completo disponible en <a href="pdf/rcm/v48n1/v48n1a02.pdf">PDF</a> </p>  <hr size="1">      <p> <b> <font size="3"> Referencias </font> </b> </p>       ]]></body>
<body><![CDATA[<!-- ref --><p> &#91;1&#93; R. Backhouse, 'Pair Algebras and Galois Connections', <i>Information Processing Letters</i> <i>67</i>, 4 (1998), 169-175.    &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=S0034-7426201400010000200001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </p>      <!-- ref --><p> &#91;2&#93; M. Barr, '*-Autonomous Categories, Revisited', <i>Journal of Pure and Applied Algebra</i> <i>111</i>, 1 (1996),    &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=S0034-7426201400010000200002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 1-20. </p>      <!-- ref --><p> &#91;3&#93; B. A. Davey and H. A. Priestley, <i>Introduction to Lattices and Order</i>, 2nd edn, Cambridge University Press,    &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=S0034-7426201400010000200003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 2002. </p>      <!-- ref --><p> &#91;4&#93; J. T. Denniston, A. Melton, and S. E. Rodabaugh, 'Formal Concept Analysis and Lattice-Valued Chu Systems', <i>Fuzzy Sets and Systems</i> <i>216</i>,  (2013), 52-90. Special Issue: Linz 2011 - Decision Theory: Qualitative and Quantitative Approaches &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=S0034-7426201400010000200004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> &#91;5&#93; M. Ern&eacute;, <i>Adjunctions and Galois Connections: Origins, History and Development</i>, Vol. 565 of <i>Mathematics and Its Applications</i>, Springer Netherlands,    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000030&pid=S0034-7426201400010000200005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 2004. </p>      <!-- ref --><p> &#91;6&#93; B. Ganter and R. Wille, <i>Formal Concept Analysis - Mathematical Foundations</i>, Springer, Berlin, Germany,    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000032&pid=S0034-7426201400010000200006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 1999. </p>      <!-- ref --><p> &#91;7&#93; V. Gupta, Chu Spaces: A Model of Concurrency, PhD thesis, Stanford University,    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000034&pid=S0034-7426201400010000200007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 1994. </p>      <!-- ref --><p> &#91;8&#93; O. Kridlo, P. Mihalcin, S. Krajci, and L. Antoni, Formal Concept Analysis of Higher Order, 'CLA', (2013), p. 117-128.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000036&pid=S0034-7426201400010000200008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </p>      <!-- ref --><p> &#91;9&#93; J. M. McDill, A. C. Melton, and G. E. Strecker, A Category of Galois Connections, 'Category Theory and Computer Science', 1987, Vol. 283 of <i>Lecture Notes in Computer Science</i>, Springer Berlin Heidelberg, p. 290-300.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000038&pid=S0034-7426201400010000200009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </p>      <!-- ref --><p> &#91;10&#93; Gerardo-Alcides Munoz, Categor&iacute;as de contextos formales, PhD thesis, Universidad Nacional de Colombia, Sede Bogot&aacute;,    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000040&pid=S0034-7426201400010000200010&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> 2011. </p>      <!-- ref --><p> &#91;11&#93; L. Shen and D. Zhang, 'The Concept Lattice Functors', <i>International Journal of Approximate Reasoning</i> <i>54</i>, 1 (2013), 166-183.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000042&pid=S0034-7426201400010000200011&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </p>      <!-- ref --><p> &#91;12&#93; Guo-Qiang Zhang, 'Chu Spaces, Concept Lattices, and Domains', <i>Electronic Notes in Theoretical Computer Science</i> <i>83</i>,  (2003), 287-302. Proceedings of 19th Conference on the Mathematical Foundations of Programming Semantics &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000044&pid=S0034-7426201400010000200012&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p> &#91;13&#93; Guo-Qiang Zhang and G. Shen, 'Aproximable Concepts, Chu Spaces, and Information Systems', <i>Theory and Applications of Categories</i> <i>17</i>, 5 (2006), 80-102.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000045&pid=S0034-7426201400010000200013&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> </p>  <hr size="1">      <center> <b>(Recibido en noviembre de 2012. Aceptado en enero de 2014)</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{RCMv48n1a02,    <br>  &nbsp;&nbsp;&nbsp; AUTHOR &nbsp;= {Mu&ntilde;oz-Qui&ntilde;ones, Gerardo},    <br>  &nbsp;&nbsp;&nbsp; TITLE &nbsp; = {{Conexiones de Galois, transformaciones de Chu y enlaces}},    <br>  &nbsp;&nbsp;&nbsp; JOURNAL = {Revista Colombiana de Matem&aacute;ticas},    <br> &nbsp;&nbsp;&nbsp; YEAR &nbsp;&nbsp; = {2014},    ]]></body>
<body><![CDATA[<br> &nbsp;&nbsp;&nbsp; volume &nbsp;= {48},    <br> &nbsp;&nbsp;&nbsp; number &nbsp;= {1},    <br> &nbsp;&nbsp;&nbsp; pages &nbsp; = {21--40}    <br> } </font></code>  <hr size="1"> </font>      ]]></body><back>
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