Is the group of compactly supported area preserving homeomorphisms of the 2-disk simple?

Abstract: This long standing open problem has been recently solved in joint work with Dan Cristofaro-Gardiner and Sobhan Seyfaddini. I will present some background and the main ideas that lead to the proof. It is based on tools from symplectic topology and more precisely on a theory due to Hutchings, called Periodic Floer Homology.

differential geometrydynamical systemsgeometric topologysymplectic geometry

Audience: researchers in the topic

Geometry and Dynamics seminar

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