Bachir Bekka

activity

20052025

most citedOperator-algebraic superrigidity for

S L_{n} (Z), n \geq 3

47 citations · 76 across the 21 of their papers we have counts for

collaborators

Showing 2019Show all

3 papers · 1 filter

math.GR2019

Unitary representations of groups, duals, and characters

Bachir Bekka, Pierre de la Harpe

This is an expository book on unitary representations of topological groups, and of several dual spaces, which are spaces of such representations up to some equivalence. The most i…

math.GR2019

Character rigidity of simple algebraic groups

Bachir Bekka

We prove the following extension of Tits' simplicity theorem. Let $k$ be an infinite field, $G$ an algebraic group defined and quasi-simple over $k,$ and $G (k)$ the group of $k$ -ra…

math.GR2019★ 10 cited

Quasi-regular representations of discrete groups and associated C*-algebras

Bachir Bekka, Mehrdad Kalantar

Let $G$ be a countable group. We introduce several equivalence relations on the set $Sub (G)$ of subgroups of $G$ , defined by properties of the quasi-regular representations $…