English

Acylindrical actions for two-dimensional Artin groups of hyperbolic type

Group Theory 2021-03-03 v3

Abstract

For a two-dimensional Artin group AA whose associated Coxeter group is hyperbolic, we prove that the action of AA on the hyperbolic space obtained by coning off certain subcomplexes of its modified Deligne complex is acylindrical. Moreover, if for each sSs\in S there is tSt\in S with mst<m_{st}< \infty, then this action is universal. As a consequence, for S3|S|\geq 3, if AA is irreducible, then it is acylindrically hyperbolic. We also obtain the Tits alternative for AA, and we classify the subgroups of AA that virtually split as a direct product. A key ingredient in our approach is a simple criterion to show the acylindricity of an action on a two-dimensional CAT(1)\mathrm{CAT}(-1) complex.

Keywords

Cite

@article{arxiv.1906.03154,
  title  = {Acylindrical actions for two-dimensional Artin groups of hyperbolic type},
  author = {Alexandre Martin and Piotr Przytycki},
  journal= {arXiv preprint arXiv:1906.03154},
  year   = {2021}
}

Comments

Final accepted version

R2 v1 2026-06-23T09:47:08.457Z