Fine Curve Graphs and Surface Homeomorphisms

Orateur: Sebastian HENSEL
Localisation: Université de Munich, Allemagne
Type: Colloquium Bézout
Site: UPEC
Salle: Salle P1 025
Date de début: 29/09/2023 - 11:30
Date de fin: 29/09/2023 - 12:30

In this talk, we will give an overview of a recent program that aims to study homeomorphism groups of surfaces using coarse geometric methods. More precisely, we will talk about the fine curve graph, which is a hyperbolic graph on which the homeomorphism group of a surface acts in an interesting way. No familiarity with curve graphs, fine or not, will be assumed. Most of the results are joint work with Jonathan Bowden and Richard Webb.