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 2018Show all

3 papers · 1 filter

math.OA2018

Infinite characters on $G L_{n} (Q)$ , on $S L_{n} (Z),$ and on groups acting on trees

Bachir Bekka

Answering a question of J. Rosenberg, we construct the first examples of infinite characters on $G L_{n} (K)$ for a global field $K$ and $n \geq 2.$ The case $n = 2$ is…

math.OA2018

Property (T) for locally compact groups and C*-algebras

Bachir Bekka, Chi-Keung Ng

Let $G$ be a locally compact group and let $C^{*} (G)$ and $C_{r}^{*} (G)$ be the full group $C^{*}$ -algebra and the reduced group $C^{*}$ -algebra of $G$ . We investigate the relationship betwe…

math.DS2018

Spectral gap property and strong ergodicity for groups of affine transformations of solenoids

Bachir Bekka, Camille Francini

Let X be a solenoid, that is, a compact finite dimensional connected abelian group with normalized Haar measure m, and let G be a countable discrete group acting on X by continuous…

Infinite characters on GLn​(Q), on SLn​(Z), and on groups acting on trees

Property (T) for locally compact groups and C*-algebras

Spectral gap property and strong ergodicity for groups of affine transformations of solenoids

Infinite characters on $G L_{n} (Q)$ , on $S L_{n} (Z),$ and on groups acting on trees