Topological extension of Calabi invariants and its application
Symplectic geometry and topology
22 October 15:30 - 16:30
Yong-Geun Oh - IBS Center for Geometry and Physics
In this talk, I will explain how we can extend the classical Calabi homomorphism on the area-preserving diffeomorphism group of two-disc to the group of Hamiltonian homeomorphisms. I will also mention implication of this extension result on the structure of area-preserving homeomorphism group of the two-disc.
University of Cambridge