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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">Talking to some of you made me realize that I sent this to the wrong mailing list. I apologize if you get this twice.
<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">Anyway: This Friday there is a minischool in Leiden.
<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">I hope you will join us. <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>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black;mso-fareast-language:EN-GB">From:
</span></b><span style="font-size:12.0pt;color:black;mso-fareast-language:EN-GB">"Rot, T.O. (Thomas)" <t.o.rot@vu.nl><br>
<b>Date: </b>Tuesday, 7 March 2023 at 16:23<br>
<b>To: </b>"Dynamics.beta" <dynamics.beta-bounces@listserver.vu.nl>, "Topology.beta" <mailman-bounces@listserver.vu.nl><br>
<b>Subject: </b>Next two DDT&G talks<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="mso-fareast-language:EN-GB"><o:p> </o:p></span></p>
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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">The next two talks in the DDT&G seminar have a dynamics/analysis flavor, so I thought it worthwhile to email my dynamic colleagues as well. <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">On Friday 17<sup>th</sup> at 14:00 Hansjoerg Geiges will give a minicourse in the DDT&G seminar in Leiden. This is not a hybrid event.<o:p></o:p></span></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal"><b><span lang="EN-US">Klein bottles in Dynamics and Topology</span><o:p></o:p></b></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Taking Klein bottles as a guiding theme, I shall discuss some aspects of 3-dimensional geometric topology and contact dynamics. Starting from Samelson's beautiful proof that hypersurfaces in Euclidean space are orientable, we will consider
the question which 3-manifolds admit embedded Klein bottles, and how to visualise such embeddings.<br>
This provides an opportunity to learn some basic terms of 3-manifold topology (prime vs. irreducible manifolds, (in-)compressible surfaces, Dehn fillings). I shall then view this in the context of contact dynamics, where Klein bottles arise, albeit rarely,
as critical surfaces of integrable Reeb flows.<br>
These lectures are based on joint work with Norman Thies, Jakob Hedicke, and Murat Sağlam.<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">On 14<sup>th</sup> of April Nils Waterstraat will speak on the spectral flow in Amsterdam.
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><br>
Abstract TBA.<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">As always master students are encouraged to attend.
<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"><a href="https://www.few.vu.nl/~trt800/ddtg.html">https://www.few.vu.nl/~trt800/ddtg.html</a><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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