01:05:02
publiée le 10 juin 2026
Riemann-Hilbert correspondence, representations of spherical DAHA, and P=W phenomenon
De Yan Soibelman
![[1954] Sur les pseudo-rotations analytiques de surfaces](/media/cache/video_light/uploads/video/SeminaireBourbaki.png)
On the algebraic structure of groups of area-preserving homeomorphisms
Apparaît dans la collection : From Hamiltonian Dynamics to Symplectic Topology
In the late 70s, Fathi showed that the group of compactly supported volume-preserving homeomorphisms of the ball is simple in dimensions greater than 2. We present our recent article which proves that the remaining group, that is area-preserving homeomorphisms of the disc, is not simple. This settles what is known as the simplicity conjecture in the affirmative. This is joint work with Dan Cristofaro-Gardiner and Vincent Humiliere.
