Y. Hashiba

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20172020

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math.OA2022

On unitary groups of crossed product von Neumann algebras

Yasuhito Hashiba

We consider the tracial crossed product algebra $M = A ⋊ Λ$ arising from a trace preserving action $σ : Λ ↷ A$ of a discrete group $Λ$ on a tracial von Neumann algebr…

math.OA2020

On central sequence algebras of tensor product von Neumann algebras

Yasuhito Hashiba

We show that when $M, N_{1}, N_{2}$ are tracial von Neumann algebras with $M^{'} \cap M^{ω}$ abelian, $M^{'} \cap (M \otimes ˉ N_{1})^{ω}$ and $M^{'} \cap (M \otimes ˉ N_{2})^{ω}$ commute in $(M\bar…