The Baum-Connes conjecture for extensions

2025/08/07 by Meyer, Ralf
Mathematics · #Advanced Topology and Set Theory #FOS: Mathematics #K-Theory and Homology (math.KT) #Rings, Modules, and Algebras

paper · doi:10.48550/arxiv.2508.05726

openalex publication_date 2025/08/07 · openalex created_date 2025/10/15 · openalex updated_date 2026/07/31

Abstract

This note provides a counterexample showing that the assumptions that Chabert and Echterhoff have imposed in their permanence property of the Baum-Connes conjecture for group extensions cannot be simplified.

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