English

Elliptic actions on Teichmuller space

Geometric Topology 2014-12-31 v1 Group Theory

Abstract

Let SS be an oriented surface of finite type, MCG(S)\mathcal{MCG}(S) its mapping class group, and T(S)\mathcal{T}(S) its Teichm\"uller space with the Teichm\"uller metric. Let HMCG(S)H \leq \mathcal{MCG}(S) be a finite subgroup and consider the subset of T(S)\mathcal{T}(S) fixed by HH, Fix(H)T(S)\mathrm{Fix}(H) \subset \mathcal{T}(S). For any R>0R>0, we prove that the set of points whose HH-orbits have diameter bounded by RR, FixRT(H)\mathrm{Fix}_R^T(H), lives in a bounded neighborhood of Fix(H)\mathrm{Fix}(H). As an application, we show that the orbit of any point XT(S)X \in \mathcal{T}(S) under the action of a finite order mapping class has a fixed coarse barycenter. By contrast, we show that FixRT(H)\mathrm{Fix}^T_R(H) need not be quasiconvex with an explicit family of examples.

Keywords

Cite

@article{arxiv.1412.8559,
  title  = {Elliptic actions on Teichmuller space},
  author = {Matthew Gentry Durham},
  journal= {arXiv preprint arXiv:1412.8559},
  year   = {2014}
}

Comments

32 pages, 2 figures. This paper is part of the author's dissertation. Comments welcome!

R2 v1 2026-06-22T07:46:40.975Z