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Stability of amalgamated free products and HNN extensions (2305.08720v2)
Published 15 May 2023 in math.GR and math.OA
Abstract: We study stability of amalgamated free products and HNN extensions of stable groups over finite groups. We focus on operator norm stability, Hilbert-Schmidt stability and stability in permutations. We provide many new examples of stable (or flexibly stable) non-amenable groups.