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math.OA2026
Invariant von Neumann subalgebras of crossed products and tensor products
Tattwamasi Amrutam, Artem Dudko, Yongle Jiang +1
Let be a countable discrete group acting on a tracial von Neumann algebra in a trace-preserving way. We study invariant von Neumann subalgebras of and of…
math.OA2026
Relative invariant subalgebra rigidity for Thompson's group
Tattwamasi Amrutam, Artem Dudko
We prove that Thompson's group satisfies the relative invariant subalgebra rigidity property with respect to its commutator subgroup: every von Neumann subalgebra of tha…