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math.OA2024
Actions of tensor categories on Kirchberg algebras
Kan Kitamura
We characterize the simplicity of Pimsner algebras for non-proper C*-correspondences. With the aid of this criterion, we give a systematic strategy to produce outer actions of unit…
math.OA2024
A note on quantum subgroups of free quantum groups
Mao Hoshino, Kan Kitamura
In this short note, quantum subgroups in finite free products of the Pontryagin duals of free unitary quantum groups are classified. They correspond to pairs of a subgroup and…