English

Powers averaging for actions on $C(X)$-algebras

Operator Algebras 2024-04-10 v2 Functional Analysis

Abstract

Given a unital C(X)C(X)-algebra AA discrete group Γ\Gamma and an action α:Γaut(A)\alpha: \Gamma\to \text{aut}(A) which leaves C(X)C(X) invariant and such that C(X)α,rΓC(X)\rtimes_{\alpha,r} \Gamma is simple, and a 22-cocycle ω\omega, we obtain a bijective correspondence between maximal Γ\Gamma-invariant ideals of AA and maximal ideals in Aα,ω,rΓA\rtimes_{\alpha,\omega,r} \Gamma. In particular, Aα,ω,rΓA\rtimes_{\alpha,\omega,r} \Gamma is simple if and only if AA has no Γ\Gamma-invariant ideals.

Keywords

Cite

@article{arxiv.2312.07702,
  title  = {Powers averaging for actions on $C(X)$-algebras},
  author = {Tattwamasi Amrutam and Ilan Hirshberg and Apurva Seth},
  journal= {arXiv preprint arXiv:2312.07702},
  year   = {2024}
}

Comments

Minor Revisions

R2 v1 2026-06-28T13:49:01.783Z