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<p class="MsoNormal"><span lang="EN-US">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Not ctaaag tomorrow, but please come to the colloquium on Wednesday at 16:00.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Speaker: Panagiotis Konstantis<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Title: GKM manifolds. At the crossroad of combinatorics, topology and geometry.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Abstract: GKM manifolds, named after Goresky, Kottwitz and MacPherson, are smooth manifolds with a certain torus action where the symmetries of this action can be encoded into a graph. There is a remarkable connection
between the combinatorial data of the graph and properties of the manifold. We will try to explore, using examples, how these graphs arise from torus actions on certain manifolds and try to do understand how they determine topological and geometric data of
the given manifold.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Best,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Thomas<o:p></o:p></span></p>
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