Hello everyone,

Tomorrow we will have Kristof Huszar joining us. He will be joining us from France, so we are especially grateful about his flexibility when determining his speaking hours. 

Title On quantifying the width of 3-dimensional manifolds 

Speaker: Kristóf Huszár, Inria 

Date: Mar 22, 2022 Time: 3:00 PM central (9pm CET)

Room: https://zoom.us/j/94529451960?pwd=ekkxYUsrRGt5bVdEQWJRN0JOZ04wZz09

Abstract: There are various ways of defining the ”width” of a 3-dimensional manifold. Well-known examples include the Heegaard genus, or, in case of hyperbolic 3-manifolds, the volume. Driven by the algorithmic study of 3-manifolds, recent years have seen a growing interest in combinatorial notions of width defined through triangulations: it has been shown that several computationally hard problems about 3-manifolds can be efficiently solved for triangulations that are sufficiently ”thin” in a certain sense. In this talk we give an overview of recent results that link these combinatorial width parameters with classical topological invariants of 3-manifolds in a quantitative way. To establish our theorems, we rely on generalized Heegaard splittings and on layered triangulations. Joint work with Jonathan Spreer and Uli Wagner. 

Here is the full zoom info: 

Topic: Okstate Topology Seminar

Time: This is a recurring meeting Meet anytime

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