<?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>1409-2433</journal-id>
<journal-title><![CDATA[Revista de Matemática Teoría y Aplicaciones]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mat]]></abbrev-journal-title>
<issn>1409-2433</issn>
<publisher>
<publisher-name><![CDATA[Centro de Investigaciones en Matemática Pura y Aplicada (CIMPA) y Escuela de Matemática, San José, Costa Rica.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1409-24332011000100007</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Optimal control of pollution stock through ecological interaction of the manufacturer and the state]]></article-title>
<article-title xml:lang="es"><![CDATA[Control óptimo de contaminación almacenada a través de interacción ecológica entre el fabricante y el estado]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Grigorieva]]></surname>
<given-names><![CDATA[Ellina V]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Khailov]]></surname>
<given-names><![CDATA[Evgenii N]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kharitonova]]></surname>
<given-names><![CDATA[E.I]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Texas Woman&#8217;s University Department of Mathematics and Computer Sciences ]]></institution>
<addr-line><![CDATA[ TX]]></addr-line>
<country>U.S.A</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Moscow State Lomonosov University Department of Computer Mathematics and Cybernetics ]]></institution>
<addr-line><![CDATA[Moscow ]]></addr-line>
<country>Russia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Moscow State Lomonosov University Department of Computer Mathematics and Cybernetics ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2011</year>
</pub-date>
<volume>18</volume>
<numero>1</numero>
<fpage>77</fpage>
<lpage>109</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1409-24332011000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1409-24332011000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1409-24332011000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A model of an interaction between a manufacturer and the state where the manufacturer produces a single product and the state controls the level of pollution is created and investigated. A local economy with a stock pollution problem that must choose between productive and environmental investments (control functions) is considered. The model is described by a nonlinear system of two differential equations with two bounded controls. The best optimal strategy is found analytically with the use of the Pontryagin Maximum Principle and Green&#8217;s Theorem.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se ha creado e investigado un modelo de interaccin entre un fabricante y el estado donde el fabricante produce un solo producto y el estado controla el nivel de contaminación. Se considera una economía local con un problema de contaminación almacenada, que debe escoger entre inversiones en producción y medio ambiente (funciones de control). El modelo es descrito por un sistema de dos ecuaciones diferenciales con dos controles acotados. La mejor estrategia de control se encuentra analíticamente usando el Principio del Máximo de Pontryagin y el Teorema de Green.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[optimal control]]></kwd>
<kwd lng="en"><![CDATA[nonlinear model]]></kwd>
<kwd lng="en"><![CDATA[environmental problem]]></kwd>
<kwd lng="es"><![CDATA[control óptimo]]></kwd>
<kwd lng="es"><![CDATA[modelo no lineal]]></kwd>
<kwd lng="es"><![CDATA[problema ambiental]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <div style="text-align: center;"><font size="4"><span  style="font-family: verdana; font-weight: bold;">Optimal control of pollution stock through ecological interaction of the manufacturer and the state</span></font>     <br>     <br> <font size="4"><span style="font-family: verdana; font-weight: bold;">Control &oacute;ptimo de contaminaci&oacute;n almacenada a trav&eacute;s de interacci&oacute;n ecol&oacute;gica entre el fabricante y el estado</span></font> </div> <font size="2"><br style="font-family: verdana;"> </font>     <div style="text-align: justify;"><font size="2"><span  style="font-family: verdana;">Ellina V. Grigorieva<a href="#autor1"><sup>*</sup></a></span> <span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;">Evgenii N. Khailov<a  href="#autor2"><sup>&#8224;</sup></a></span> <span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;">E.I. Kharitonova<a  href="#autor3"><sup>&#8225;</sup></a></span> <span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;"></span></font></div> <font size="2"><span style="font-family: verdana;">    <br> <a name="autor1"></a>*Department of Mathematics and Computer Sciences, Texas Woman&#8217;s University, Denton, TX 76204, U.S.A. E-Mail: <a  href="mailto:EGrigorieva@mail.twu.edu">EGrigorieva@mail.twu.edu</a>    <br> </span><span style="font-family: verdana;"><a name="autor2"></a>&#8224;Department of Computer Mathematics and Cybernetics, Moscow State Lomonosov University, Moscow, 119992, Russia. E-Mail: <a  href="mailto:khailov@cs.msu.su">khailov@cs.msu.su</a></span><a  href="mailto:khailov@cs.msu.su"> </a><span style="font-family: verdana;">    <br> <a name="autor3"></a>&#8225;Misma direccin que/same address as E.N. Khailov.    ]]></body>
<body><![CDATA[<br>     <br> <a href="#correspondencia">Direcci&oacute;n para correspondencia</a><br  style="font-family: verdana;"> </span><font size="3"><span  style="font-family: verdana; font-weight: bold;">    <br> </span></font></font>     <div style="text-align: justify;"><font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;"></span></font></font> <hr style="width: 100%; height: 2px;"><font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;">Abstract</span></font> <span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;">A model of an interaction between a manufacturer and the state where the&nbsp; manufacturer produces a single product and the state controls the level of pollution is&nbsp; created and investigated. A local economy with a stock pollution problem that must&nbsp; choose between productive and environmental investments (control functions) is&nbsp; considered. The model is described by a nonlinear system of two differential equations&nbsp; with two bounded controls. The best optimal strategy is found analytically with the use&nbsp; of the Pontryagin Maximum Principle and Green&#8217;s Theorem. </span></font><br  style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;"></span></span></font>    <br> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;">Keywords:</span> optimal control, nonlinear model, environmental problem.</span></font><br  style="font-family: verdana;"> <font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;"></span></font></font>    <br> <font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;">Resumen</span></font> <span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;"></span></font>    <br> <font size="2"><span style="font-family: verdana;">Se ha creado e investigado un modelo de interaccin entre un fabricante y el estado&nbsp; donde el fabricante produce un solo producto y el estado controla el nivel de&nbsp; contaminaci&oacute;n. Se considera una econom&iacute;a local con un problema de contaminaci&oacute;n&nbsp; almacenada, que debe escoger entre inversiones en producci&oacute;n y medio ambiente&nbsp; (funciones de control). El modelo es descrito por un sistema de dos ecuaciones&nbsp; diferenciales con dos controles acotados. La mejor estrategia de control se encuentra&nbsp; anal&iacute;ticamente usando el Principio del M&aacute;ximo de Pontryagin y el Teorema de Green.</span></font><br  style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;"></span></span></font>    ]]></body>
<body><![CDATA[<br> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;">Palabras clave:</span> control &oacute;ptimo, modelo no lineal, problema ambiental.</span></font><br style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;"></span></span></font>    <br> <font size="2"><span style="font-family: verdana;"><span  style="font-weight: bold;">Mathematics Subject Classification: </span>49J15, 49N90, 93C10, 93C95.</span>     <br>     <br> </font> <hr style="width: 100%; height: 2px;"><font size="2"><span  style="font-family: verdana;">Ver contenido disponible en pdf</span></font><font  size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;"></span></font></font>    <br> <font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;"></span></font></font><font  size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;"></span></font></font> <hr style="width: 100%; height: 2px;"><font size="2"></font>     <p><font size="2"><font size="3"><span  style="font-family: verdana; font-weight: bold;">References</span></font></font><br  style="font-family: verdana;"> </p>     <!-- ref --><p><br style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;">[1] Brock, W.; Taylor, M.S. 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(2007) &#8220;Customer interaction in environmental&nbsp; innovation: the case of cloth diaper laundering&#8221;, Service Business 1(2): 141&#8211;158.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1956415&pid=S1409-2433201100010000700011&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --></span></font><br  style="font-family: verdana;"> <br style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;">[12] Sethi, S.; Thompson, G. (2003) Optimal Control Theory: Application to Management Science and Economics. 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Springer-Verlag, Berlin-Heidelberg-New York.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1956420&pid=S1409-2433201100010000700016&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --> </span></font><br  style="font-family: verdana;"> <br style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;">[17] Hajek, O. (1991) Control Theory in the Plane, Lecture Notes in Control and&nbsp; Information Science 153. 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John Wiley &amp; Sons, New York.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1956422&pid=S1409-2433201100010000700018&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --></span></font><br style="font-family: verdana;"> <br style="font-family: verdana;"> <font size="2"><span style="font-family: verdana;">[19] Mangasarian, O.L. (1994) Nonlinear Programming. SIAM, Philadelphia.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=1956423&pid=S1409-2433201100010000700019&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><br>     <br>     <br> </span></font> </p>     <div style="text-align: left;"><font size="2"><span  style="font-family: verdana;"><a name="correspondencia"></a>Correspondencia a: </span></font><font size="2"><span style="font-family: verdana;">Ellina V. Grigorieva. </span></font><font size="2"><span  style="font-family: verdana;">Department of Mathematics and Computer Sciences, Texas Woman&#8217;s University, Denton, TX 76204, U.S.A. E-Mail: <a  href="mailto:khailov@cs.msu.su">EGrigorieva@mail.twu.edu</a></span></font> </div> </div>     <div style="text-align: left;"><font size="2"><span  style="font-family: verdana;">Evgenii N. Khailov. </span></font><font  size="2"><span style="font-family: verdana;">Department of Computer Mathematics and Cybernetics, Moscow State Lomonosov University, Moscow, 119992, Russia. E-Mail: <a  href="mailto:khailov@cs.msu.su">khailov@cs.msu.su</a></span></font>    ]]></body>
<body><![CDATA[<br> <font size="2"><span style="font-family: verdana;"></span></font><font  size="2"><span style="font-family: verdana;">E.I. Kharitonova. </span></font><font size="2"><span  style="font-family: verdana;">Misma direccin que/same address as E.N. Khailov</span></font></div>     <div style="text-align: center;"><font size="2"><span  style="font-family: verdana;"></span></font> <hr style="width: 100%; height: 2px;"><font size="2"><span  style="font-family: verdana;">Received: 24 Sep 2010; Revised: 19 Nov 2010; Accepted: 26 Nov 2010</span></font>    <br> </div>      ]]></body><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brock]]></surname>
<given-names><![CDATA[W]]></given-names>
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