Actions of Homeo and Diffeo groups on manifolds
Lei Chen (Caltech)
Monday 18th January, 2021 16:00-17:00 Online
In this talk, I discuss the general question of how to obstruct and construct group actions on manifolds. I will focus on large groups like Homeo(M) and Diff(M) about how they can act on another manifold N. The main result is an orbit classification theorem, which fully classifies possible orbits. I will also talk about some low dimensional applications and open questions. This is a joint work with Kathryn Mann.
The talk will be preceded by a tea time at 3:45pm. The Zoom link for the seminar is https://uofglasgow.zoom.us/j/91412568415 and the passcode is the genus of the two-dimensional sphere (4 letters, all lowercase).
If you would like to subscribe to the seminar mailing list, go to https://outlook.office365.com/people/, search "Geometry & Topology" and click "Join group".