In type III1 factors the ultrapower of the spectral subspace M(σ^φ, F) is a proper subset of the spectral subspace of the ultrapowered algebra.
Haagerup,The standard form of von Neumann algebras, Math
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The bicentralizer problem for III1 factors has a positive solution if and only if the bicentralizer functor is a zeroset in the theory of III1 factors, and the class of such factors with trivial bicentralizer is ∀∃-axiomatizable.
Rep^G(A) for a conformal net A with discrete group G action is canonically a G-crossed balanced W*-tensor category.
Quantum f-divergence equals classical f-divergence of Nussbaum-Szkoła distributions for normal states on semifinite von Neumann algebras.
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Ultrapowers of spectral subspaces
In type III1 factors the ultrapower of the spectral subspace M(σ^φ, F) is a proper subset of the spectral subspace of the ultrapowered algebra.
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Model theory and Connes' bicentralizer problem
The bicentralizer problem for III1 factors has a positive solution if and only if the bicentralizer functor is a zeroset in the theory of III1 factors, and the class of such factors with trivial bicentralizer is ∀∃-axiomatizable.
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Twisted representations of conformal nets and crossed balanced tensor categories
Rep^G(A) for a conformal net A with discrete group G action is canonically a G-crossed balanced W*-tensor category.
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Quantum $f$-divergences via Nussbaum-Szko{\l}a Distributions in Semifinite von Neumann Algebras
Quantum f-divergence equals classical f-divergence of Nussbaum-Szkoła distributions for normal states on semifinite von Neumann algebras.