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DTSTART:20201118T130000Z
DTEND:20201118T140000Z
SUMMARY:Colloquium - Lei Chen
DESCRIPTION:
Title: Actions of Homeo and Diffeo groups on manifolds
Abstract: 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.
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