74 citations · 116 across the 7 of their papers we have counts for
Showing 2002 · math.OAShow all
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math.OA2002★ 2 cited
On the Fundamental Group of Type II Factors
Sorin Popa
We present here a shorter version of the proof of a result from our paper ``On a class of type II factors with Betti numbers invariants'', showing that the von Neumann factor a…
math.OA2002★ 74 cited
On a Class of Type II Factors with Betti Numbers Invariants
Sorin Popa
We prove that a type II factor can have at most one Cartan subalgebra satisfying a combination of rigidity and compact approximation properties. We use this result to s…