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

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cond-mat.mtrl-sci2025

Representations of the symmetry groups of infinite crystals

Bachir Bekka, Christian Brouder

We investigate the representations of the symmetry groups of infinite crystals. Crystal symmetries are usually described as the finite symmetry group of a finite crystal with perio…

math.RT2025

Canonical Commutation Relations: A quick proof of the Stone-von Neumann theorem and an extension to general rings

Bachir Bekka

Let $R$ be a (not necessary commutative) ring with unit, $d \geq 1$ an integer, and $λ$ a unitary character of the additive group $(R, +) .$ A pair $(U, V)$ of unitary representations…