Stable rank one in nonnuclear crossed products

2025/11/25 by Jamie Bell, Bell, Jamie, Shirly Geffen +3
Mathematics · #Advanced Operator Algebra Research #Geometric and Algebraic Topology #Mathematical Dynamics and Fractals

paper · pdf · doi:10.48550/arxiv.2511.20132

Abstract

We initiate an investigation into the local structure of simple nonnuclear C^*-crossed products by showing that stable rank one is generic within two natural classes of minimal actions of free groups on the Cantor set. The arguments also apply to some other free product groups. Our approach is inspired by Li and Niu's stable rank one theorem in the amenable setting and also yields a streamlined argument in that case, along with a generalization to product actions.

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• Stable rank of C(X)\rtimesΓ
• Stable rank for crossed products by actions of finite groups on C*-algebras
• Crossed products of the Cantor set by free minimal actions of Z^d
• Stable rank for crossed products by finite group actions with the weak tracial Rokhlin property