Dynamical and topological obstructions to extending group actions
Speaker:
Sam Nariman, Northwestern University
Date and Time:
Monday, July 8, 2019 - 2:00pm to 3:00pm
Location:
Fields Institute, Room 230
Abstract:
We will discuss cohomological obstructions to extending group actions on the boundary ∂M of a 3-manifold to a C0-action on M when ∂M is diffeomorphic to a torus or a sphere. In particular, we show that for a 3-manifold M with torus boundary which is not diffeomorphic to a solid torus, the torus action on the boundary does not extend to a C0-action on M.