# Separable algebras in multitensor C*-categories are unitarizable

December 19, 2023

Recently, S. Carpi et al. (Comm. Math. Phys., 402:169-212, 2023) proved that every connected (i.e. haploid) Frobenius algebra in a tensor C*-category is unitarizable (i.e. isomorphic to a special C*-Frobenius algebra).
Building on this result, we extend it to the non-connected case by showing that an algebra in a multitensor C*-category is unitarizable if and only if it is separable.

open access link
AIMS Mathematics 9 (2024) 11320-11334. Special Issue Operator
Theory: Advances and Applications

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