Commuting conjugates of finite-order mapping classes
Abstract
Let be the mapping class group of the closed orientable surface of genus . In this paper, we derive necessary and sufficient conditions for two finite-order mapping classes to have commuting conjugates in . As an application of this result, we show that any finite-order mapping class, whose corresponding orbifold is not a sphere, has a conjugate that lifts under any finite-sheeted cover of . Furthermore, we show that any torsion element in the centralizer of an irreducible finite order mapping class is of order at most . We also obtain conditions for the primitivity of a finite-order mapping class. Finally, we describe a procedure for determining the explicit hyperbolic structures that realize two-generator finite abelian groups of as isometry groups.
Cite
@article{arxiv.1901.11314,
title = {Commuting conjugates of finite-order mapping classes},
author = {Neeraj K. Dhanwani and Kashyap Rajeevsarathy},
journal= {arXiv preprint arXiv:1901.11314},
year = {2019}
}
Comments
24 pages, 7 figures, 1 table