English

Extra-large type Artin groups are hierarchically hyperbolic

Group Theory 2021-09-10 v1

Abstract

We show that Artin groups of extra-large type, and more generally Artin groups of large and hyperbolic type, are hierarchically hyperbolic. This implies in particular that these groups have finite asymptotic dimension and uniform exponential growth. We prove these results by using a combinatorial approach to hierarchical hyperbolicity, via the action of these groups on a new complex that is quasi-isometric both to the coned-off Deligne complex introduced by Martin-Przytycki and to a generalisation due to Morris-Wright of the graph of irreducible parabolic subgroups of finite type introduced by Cumplido-Gebhardt-Gonz\'alez-Meneses-Wiest.

Keywords

Cite

@article{arxiv.2109.04387,
  title  = {Extra-large type Artin groups are hierarchically hyperbolic},
  author = {Mark Hagen and Alexandre Martin and Alessandro Sisto},
  journal= {arXiv preprint arXiv:2109.04387},
  year   = {2021}
}

Comments

62 pages, 4 figures

R2 v1 2026-06-24T05:49:56.843Z