English

Algorithms detecting stability and Morseness for finitely generated groups

Group Theory 2020-04-21 v1 Geometric Topology

Abstract

The notions of stable and Morse subgroups of finitely generated groups generalize the concept of a quasiconvex subgroup of a word-hyperbolic group. For a word-hyperbolic group GG, Kapovich provided a partial algorithm which, on input a finite set SS of GG, halts if SS generates a quasiconvex subgroup of GG and runs forever otherwise. In this paper, we give various detection and decidability algorithms for stability and Morseness of a finitely generated subgroup of mapping class groups, right-angled Artin groups, toral relatively hyperbolic groups, and finitely generated groups discriminated by a locally quasiconvex torsion-free hyperbolic group (for example, ordinary limit groups).

Keywords

Cite

@article{arxiv.1908.04460,
  title  = {Algorithms detecting stability and Morseness for finitely generated groups},
  author = {Heejoung Kim},
  journal= {arXiv preprint arXiv:1908.04460},
  year   = {2020}
}
R2 v1 2026-06-23T10:45:53.625Z