Comparing Two Notions of Coaction Invariance of Ideals in C^*-Algebras

2026/01/10 by Matthew Gillespie, Benjamin Jones, S. Kaliszewski +1
Mathematics · #math.OA

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Abstract

Given a coaction δ of a locally compact group G on a C^*-algebra A, we study the relationship between two different forms of coaction invariance of ideals of A and the ideals of the corresponding crossed product C^*-algebra A \rtimes_δ G. In particular, we characterize when these two notions of invariance are equivalent.

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