English

Punctured surfaces, quiver mutations, and quotients of Coxeter groups

Combinatorics 2025-09-03 v2 Group Theory

Abstract

In 2011, Barot and Marsh provided an explicit construction of presentation of a finite Weyl group WW by any quiver mutation-equivalent to an orientation of a Dynkin diagram with Weyl group WW. The construction was extended by the authors of the present paper to obtain presentations for all affine Coxeter groups, as well as to construct groups from triangulations of unpunctured surfaces and orbifolds, where the groups are invariant under change of triangulation and thus are presented as quotients of numerous distinct Coxeter groups. We extend the construction to include most punctured surfaces and orbifolds, providing a new invariant for almost all marked surfaces.

Keywords

Cite

@article{arxiv.2412.04960,
  title  = {Punctured surfaces, quiver mutations, and quotients of Coxeter groups},
  author = {Anna Felikson and Michael Shapiro and Pavel Tumarkin},
  journal= {arXiv preprint arXiv:2412.04960},
  year   = {2025}
}

Comments

29 pages, many figures