12 citations · 17 across the 3 of their papers we have counts for
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math.GR2007★ 1 cited
Proper actions of lamplighter groups associated with free groups
Yves De Cornulier, Yves Stalder, Alain Valette
Given a finite group and a free group , we prove that the wreath product admits a metrically proper, isometric action on a Hilbert space.
math.GR2005★ 4 cited
A note on quotients of word hyperbolic groups with Property (T)
Yves de Cornulier
Every discrete group with Kazhdan's Property (T) is a quotient of a torsion-free, word hyperbolic group with Property (T).
math.GR2004★ 12 cited
Kazhdan and Haagerup Properties in algebraic groups over local fields
Yves de Cornulier
Given a Lie algebra \s, we call Lie \s-algebra a Lie algebra endowed with a reductive action of \s. We characterize the minimal \s-Lie algebras with a nontrivial action of \s, in t…