Coarse cubical rigidity

We show that for many right-angled Artin and Coxeter groups, all cocompact cubulations coarsely look the same: they induce the same coarse median structure on the group. These are the first examples of non-hyperbolic groups with this property. For all graph products of finite groups and for Coxeter...

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Published in:arXiv.org 2024-06
Main Authors: Fioravanti, Elia, Levcovitz, Ivan, Sageev, Michah
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Automorphisms
Group theory
Subgroups
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Levcovitz, Ivan
Sageev, Michah
description We show that for many right-angled Artin and Coxeter groups, all cocompact cubulations coarsely look the same: they induce the same coarse median structure on the group. These are the first examples of non-hyperbolic groups with this property. For all graph products of finite groups and for Coxeter groups with no irreducible affine parabolic subgroups of rank \(\geq 3\), we show that all automorphism preserve the coarse median structure induced, respectively, by the Davis complex and the Niblo-Reeves cubulation. As a consequence, automorphisms of these groups have nice fixed subgroups and satisfy Nielsen realisation.
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subjects Automorphisms
Group theory
Subgroups
title Coarse cubical rigidity
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