56:14
publiée le 20 juin 2025
A family of Fano manifolds obtained as linear sections of the spinor tenfold
De Laurent Manivel
Action of the Cremona group on a CAT(0) cube complex
De Anne Lonjou
Apparaît dans la collection : Virtual Geometric Group Theory conference / Rencontre virtuelle en géométrie des groupes
The Cremona group is the group of birational transformations of the projective plane. Even if this group comes from algebraic geometry, tools from geometric group theory have been powerful to study it. In this talk, based on a joint work with Christian Urech, we will build a natural action of the Cremona group on a CAT(0) cube complex. We will then explain how we can obtain new and old group theoretical and dynamical results on the Cremona group.
