Atticus Stonestrom - Approximate groups in NIP structures

Quand : 28 mai 2026 à 15:00

Où : ICJ

Organisé par : Institut Henri Poincaré

Recall that a subset X of a group is said to be an approximate group if the product set XX:=\{ab:a,b\in X\} can be covered by finitely many translates of X. I will discuss a work-in-progress which attempts to give a structure theory for approximate groups definable in NIP theories. First I will present an example of an approximate group definable in the universal cover of SL(2,R) that has no "loca