Enumeration of the Equisymmetric Strata of the Moduli Space of Surfaces of Low Genus

- preliminary report-

S. Allen Broughton
Rose-Hulman Institute of Technology
April 16, 2005

at the

Univerity of Santa Barbara, Santa Barbara, CA (2005 Spring Western Section Meeting) Meeting # 1007


Two surfaces are called equisymmetric, or are said to have the same symmetry type, if the two surfaces’ conformal automorphism groups determine conjugate finite subgroups of the mapping class group. The subset of the moduli space corresponding to surfaces equisymmetric with given surface forms a locally closed subvariety of the moduli space, called an equisymmetric stratum. In previous work, it was shown that the equisymmetric strata are irreducible, finite in number, have easily computed dimensions, and do form a stratification of the moduli space. The stratification has been used to derive information about the cohomology of the mapping class group. Recent advances in computer calculation with finite groups allow for the possibility of explicitly enumerating the equisymmetric strata for moduli spaces of low genus. In this preliminary report we give some initial findings on this enumeration problem.

Lecture and other materials


One of my references on which the talk is based has an omission. The paper is


Email:  allen.broughton@rose-hulman.edu
Webpage:  http://www.rose-hulman.edu/~brought/
This page last updated on 18 Apr 05.