Neck-stretching, and unknottedness of Lagrangian spheres in S^2 x S^2 (Felix Schlenk, University of Neuchâtel)

19.02.2020 14:30 – 15:30

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.

Lieu

Bâtiment: Battelle

entrée libre