3 papers
math.GR2022
Maximal amenable subgroups of arithmetic groups
Vadim Alekseev, Alessandro Carderi
By classifying -maximal amenable subgroups of algebraic groups over a global field of characteristic zero, we obtain a complete classification of maximal amenable subgroups up t…
math.OA2018
Uniqueness questions for C*-norms on group rings
Vadim Alekseev, David Kyed
We provide a large class of discrete amenable groups for which the complex group ring has several C*-completions, thus providing partial evidence towards a positive answer to a que…
math.GR2018
On invariant random positive definite functions
Vadim Alekseev, Rahel Brugger
We give the definition of an invariant random positive definite function on a discrete group, generalizing both the notion of an invariant random subgroup and a character. We use v…