Intersection-saturated groups and groups with micro-supported actions (Dominik Francoeur, Madrid)

04.12.2025 16:15

A group is said to possess the Howson property if the intersection of any two finitely generated subgroups is again finitely generated. When a group fails to have the Howson property, one can try to characterise how far it is from having it. Such considerations give rise to the notion of intersection-saturated groups, introduced recently by Delgado, Roy and Ventura. In this talk, we'll see a new construction for intersection-saturated groups, based on so-called micro-supported actions, that allows one in particular to produce finitely presented amenable examples.

Lieu

Bâtiment: Conseil Général 7-9

Room 1-15, Thursday 04.12.2025, Attn: unusual day, time & place, Séminaire "Groupes et géométrie"

entrée libre