Seminar

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.
Organizers
Tobias Ekholm,
Uppsala University
Yakov Eliashberg
Stanford University
Lenhard Ng
Duke University
Ivan Smith
University of Cambridge

Program
Contact

Tobias Ekholm

tobias.ekholm@math.uu.se

Other
information

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