47 citations · 76 across the 21 of their papers we have counts for
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math.DS2005★ 1 cited
A spectral gap property for random walks under unitary representations
Bachir Bekka, Yves Guivarc'h
Let be a locally compact group and a probability measure on which is not assumed to be absolutely continuous with respect to Haar measure. Given a unitary representati…
math.OA2005★ 1 cited
A property (T) for C*-algebras
Bachir Bekka
We define a notion of Property (T) for an arbitrary -algebra admitting a tracial state. We extend this to a notion of Property (T) for the pair where is a $C^…