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Groups acting on the 3-sphere and 4-dimensional surgery

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Speaker: 
Grigori Avramidi
Zugehörigkeit: 
MPIM
Datum: 
Mon, 25/02/2019 - 16:30 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

I will explain what the validity of surgery in dimension 4 would imply about groups (mostly free groups) acting on the 3-sphere, and describe some interesting examples of such actions.
This is an expository talk about some stuff (mostly due to Freedman) from the 1980's.

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