[Topology.beta] DDT&G this friday : dynamics and topology.

[Rot, T.O. (Thomas)]

Dear all,

Talking to some of you made me realize that I sent this to the wrong mailing list. I apologize if you get this twice.

Anyway: This Friday there is a minischool in Leiden.

I hope you will join us.

Best,
Thomas

From: "Rot, T.O. (Thomas)" <t.o.rot at vu.nl>
Date: Tuesday, 7 March 2023 at 16:23
To: "Dynamics.beta" <dynamics.beta-bounces at listserver.vu.nl>, "Topology.beta" <mailman-bounces at listserver.vu.nl>
Subject: Next two DDT&G talks

Dear all,

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.

On Friday 17th at 14:00 Hansjoerg Geiges will give a minicourse in the DDT&G seminar in Leiden. This is not a hybrid event.

Klein bottles in Dynamics and Topology

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.
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.
These lectures are based on joint work with Norman Thies, Jakob Hedicke, and Murat Sağlam.

On 14th of April Nils Waterstraat will speak on the spectral flow in Amsterdam.

Abstract TBA.

As always master students are encouraged to attend.

https://www.few.vu.nl/~trt800/ddtg.html

Best,
Thomas
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