Seminario

Seminario Teoría de Grupos

Near actions

Ponente:  Yves de Cornulier (Universidad de Lyon 1 - Claude Bernard)
Fecha:  miércoles 08 de marzo de 2023 - 10:00
Lugar:  Aula Roja, IFT

Resumen:

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?