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Seminario Teoría de grupos
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?