Sorin Popa

most citedOn the Cohomology of Actions of Groups by Bernoulli Shifts

9 citations · 22 across the 4 of their papers we have counts for

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math.OA2004★ 7 cited

Some computations of 1-cohomology groups and construction of non orbit equivalent actions

Sorin Popa

For each group $G$ having an infinite normal subgroup with the relative property (T) (for instance $G = H \times K$ where $H$ is infinite with property (T) and $K$ is arbitrary), a…

math.OA2004

Strong rigidity of II $_{1}$ factors arising from malleable actions of w-rigid groups, II

Sorin Popa

We prove that any isomorphism $θ : M_{0} ≃ M$ of group measure space II $_{1}$ factors, $M_{0} = L^{\infty} (X_{0}, μ_{0}) ⋊_{σ_{0}} G_{0}$ , $M = L^{\infty} (X, μ) ⋊_{σ} G$ , with $G_{0}$ containi…

math.OA2003★ 9 cited

On the Cohomology of Actions of Groups by Bernoulli Shifts

Sorin Popa, Roman Sasyk

We prove that if $G$ is a countable, discrete group having infinite, normal subgroups with the relative property (T), then the Bernoulli shift action of $G$ on ${\underset g \in G…

math.OA2003★ 6 cited

Strong Rigidity of II $_{1}$ Factors Arising from Malleable Actions of w-Rigid Groups, I

Sorin Popa

We consider cross-product II $_{1}$ factors $M = N ⋊_{σ} G$ , with $G$ discrete ICC groups that contain infinite normal subgroups with the relative property (T) and $σ: G \to {\text…

Some computations of 1-cohomology groups and construction of non orbit equivalent actions

Strong rigidity of II1​ factors arising from malleable actions of w-rigid groups, II

On the Cohomology of Actions of Groups by Bernoulli Shifts

Strong Rigidity of II1​ Factors Arising from Malleable Actions of w-Rigid Groups, I

Strong rigidity of II $_{1}$ factors arising from malleable actions of w-rigid groups, II

Strong Rigidity of II $_{1}$ Factors Arising from Malleable Actions of w-Rigid Groups, I