Parametrization of the Teichmüller Space of Bordered Surface NEC Groups

作     者：B.ESTRADA E.MARTíNEZ 

作者机构：Departamento de Matemdticas FundamentalesUNEDPaseo Senda del Rey 928040 MadridSpain 

出 版 物：《Acta Mathematica Sinica,English Series》 (数学学报（英文版）)

年 卷 期：2008年第24卷第6期

页      面：1039-1056页

核心收录：

学科分类：07[理学] 070104[理学-应用数学] 0701[理学-数学] 

基　　金：MTM2005-01637 

主　　题：non-Euclidean crystallographic groups hyperbolic polygons Klein surfaces automorphisms of surfaces Teichmfiller space 

摘      要：A non-Euclidean crystallographic group F （NEC group, for short） is a discrete subgroup of isometries of the hyperbolic plane H, with compact quotient space H/Г. These groups uniformize Klein surfaces, surfaces endowed with dianalytic structure. These surfaces can be seen as a generalization of Riemann surfaces. Fundamental polygons play an important role in the study of parametrizations of the Teichmuller space of NEC groups. In this work we construct a class of right-angled polygons which are fundamental regions of bordered surface NEC groups. The free parameters used in the construction of the polygons give a parametrization of the Teichmuller space. From the parameters we obtain explicit matrices of the generators of the groups. Finally, we give examples to exhibit how different relations between the parameters reflect the existence of automorphisms on the quotient surfaces.