<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class="">La hora de Uruguay coincide con la de Brasília.<div class=""><br class=""><div><div class=""><div style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><div class=""><blockquote type="cite" class=""><div class="">Begin forwarded message:</div><br class="Apple-interchange-newline"><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, "Helvetica Neue", Helvetica, sans-serif;" class=""><b class="">From: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">Seminario Internacional de Matemática <<a href="mailto:seminariointmat@gmail.com" class="">seminariointmat@gmail.com</a>><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, "Helvetica Neue", Helvetica, sans-serif;" class=""><b class="">Subject: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><b class="">[Seminario] Seminario | Carlos Di Prisco | 11/12</b><br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, "Helvetica Neue", Helvetica, sans-serif;" class=""><b class="">Date: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class="">6 December 2020 at 19:57:16 CET<br class=""></span></div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px;" class=""><span style="font-family: -webkit-system-font, "Helvetica Neue", Helvetica, sans-serif;" class=""><b class="">To: </b></span><span style="font-family: -webkit-system-font, Helvetica Neue, Helvetica, sans-serif;" class=""><a href="mailto:seminariointmat@googlegroups.com" class="">seminariointmat@googlegroups.com</a>, Seminario Internacional de Matemática <<a href="mailto:seminariointmat@gmail.com" class="">seminariointmat@gmail.com</a>>, Carlos Di Prisco <<a href="mailto:cdiprisc@gmail.com" class="">cdiprisc@gmail.com</a>><br class=""></span></div><br class=""><div class=""><div dir="ltr" class=""><div dir="ltr" class=""><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Estimados amigos y colegas,</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Próximo viernes 11 de diciembre tendremos la última charla por este año del “Seminario Internacional de Matemática”. Esta vez tendremos como invitado a Carlos Di Prisco, profesor en la Universidad de los Andes en Colombia.</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Hora: </span><b class=""><span style="font-family:"Times New Roman"" class="">4pm hora de Venezuela</span></b><span style="font-family:"Times New Roman"" class=""> (12pm Hora del Pacífico = 17hs Hora de Brasília).</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">**************************************************</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Título: Números cromáticos de grafos en espacios polacos.</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Resumen: </span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Los grafos definidos en espacios polacos ofrecen una serie de aspectos interesantes desde el punto de vista de la teoría de conjuntos. Presentaremos varios resultados sobre coloraciones de grafos (X, E) cuyo conjunto de vértices X es un espacio métrico completo separable y la relación E, de aristas, es definible. En este caso, una coloración boreliana del grafo es una función Borel medible c : X → K, con K a lo</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">sumo numerable, tal que si {x, y} ∈ E entonces c(x)</span><span style="font-family:Arial" class="">≠</span><span style="font-family:"Times New Roman"" class=""> c(y). Cuando existe una tal coloración, el número cromático boreliano del grafo es la menor cardinalidad posible para el conjunto K. El grafo definido en N</span><sup class=""><span style="font-family:"Times New Roman";vertical-align:super" class="">[∞]</span></sup><span style="font-family:"Times New Roman"" class="">, el conjunto de los subconjuntos infinitos de N, por la operación de traslado es un ejemplo que miraremos con especial atención, junto con una familia de grafos definidos en el espacio de Cantor 2</span><sup class=""><span style="font-family:"Times New Roman";vertical-align:super" class="">N</span></sup><span style="font-family:"Times New Roman"" class=""> por familias de sucesiones finitas F ⊆ 2</span><sup class=""><span style="font-family:"Times New Roman";vertical-align:super" class=""><∞</span></sup><span style="font-family:"Times New Roman"" class="">.</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">**************************************************</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Para participar del evento deben ingresar a través del enlace</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><a href="https://gonzaga.zoom.us/j/96233196897" class=""><span style="font-family:"Times New Roman"" class="">https://gonzaga.zoom.us/j/96233196897</span></a><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Página </span><a href="https://sites.google.com/view/semintmat/in%C3%ADcio" class=""><u class=""><span class="gmail-15" style="font-family:"Times New Roman";color:rgb(0,0,255)">https://sites.google.com/view/semintmat/</span></u></a><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Canal de YouTube </span><a href="https://www.youtube.com/channel/UCl7k5VAnNt-qlrZqxvRKBtg" class=""><u class=""><span class="gmail-15" style="font-family:"Times New Roman";color:rgb(0,0,255)">https://www.youtube.com/channel/UCl7k5VAnNt-qlrZqxvRKBtg</span></u></a><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Agradecemos divulgar en sus respectivas instituciones y con otros colegas.</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">¡Sean todos bienvenidos!</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><div class=""><span style="font-family:"Times New Roman"" class=""><span class=""> </span></span><br class="webkit-block-placeholder"></div><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Saludos cordiales,</span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p><p class="MsoNormal"><span style="font-family:"Times New Roman"" class="">Tomás, Marco y Cristina </span><span style="font-family:"Times New Roman"" class=""><span class=""></span></span></p></div></div><div class=""><br class="webkit-block-placeholder"></div>
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