19th February 2020: Neck-stretching and unknottedness of Lagrangian spheres in S^2 x S^2, I

Felix Schlenk (Université de Neuchâtel)

Title: Neck-stretching and unknottedness of Lagrangian spheres in S^2 x S^2, I

Abstract: 

The "stretching the neck'' technique is a powerful method in symplectic topology and Hamiltonian dynamics, with applications to embedding problems, to Reeb dynamics, and to the study of Lagrangian submanifolds. I'll try to explain this technique by using it to prove that every Lagrangian sphere in S^2 x S^2 is Hamiltonian isotopic to the anti-diagonal, following Richard Hind's GAFA paper from 2004.

Villa Battelle, Wednesday 19th February, 14:30

This seminar is part of the Symplectic geometry seminar, jointly with Université de Neuchâtel.