Seminario Teoría de grupos 

8 de marzo de 2023

10:00 Aula Roja, IFT

Speaker: Yves de Cornulier (University of Lyon)

Title: Near actions

Abstract: I'll introduce the notion of near actions (of groups on 
sets). These are defined similarly as actions, except that each group 
element acts "outside a finite subset" and the action axioms are 
satisfied "outside a finite subset". I will present many examples, and 
notably discuss the realizability conditions: is a given near action 
induced by a genuine action?