数学物理学报(英文版) ›› 2016, Vol. 36 ›› Issue (2): 334-344.doi: 10.1016/S0252-9602(16)30003-0

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A BINARY INFINITESIMAL FORM OF TEICHMÜLLER METRIC AND ANGLES IN AN ASYMPTOTIC TEICHMÜLLER SPACE

吴艳1,2, 漆毅3   

  1. 1. LMIB and School of Mathematics and Systems Science, Beihang University, Beijing 100191, China;
    2. School of Science, Linyi University, Shandong 276005, China;
    3. LMIB and School of Mathematical Science and Systems Science, Beihang University, Beijing 100191, China
  • 收稿日期:2015-04-22 出版日期:2016-04-25 发布日期:2016-04-25
  • 作者简介:Yan WU,E-mail:wuyan@lyu.edu.cn;Yi QI,E-mail:yiqi@buaa.edu.cn

A BINARY INFINITESIMAL FORM OF TEICHMÜLLER METRIC AND ANGLES IN AN ASYMPTOTIC TEICHMÜLLER SPACE

Yan WU1,2, Yi QI3   

  1. 1. LMIB and School of Mathematics and Systems Science, Beihang University, Beijing 100191, China;
    2. School of Science, Linyi University, Shandong 276005, China;
    3. LMIB and School of Mathematical Science and Systems Science, Beihang University, Beijing 100191, China
  • Received:2015-04-22 Online:2016-04-25 Published:2016-04-25

摘要:

The geometry of Teichmüller metric in an asymptotic Teichmüller space is studied in this article. First, a binary infinitesimal form of Teichmüller metric on AT(X) is proved. Then, the notion of angles between two geodesic curves in the asymptotic Teichmüller space AT(X) is introduced. The existence of such angles is proved and the explicit formula is obtained. As an application, a sufficient condition for non-uniqueness geodesics in AT(X) is obtained.

关键词: Angles of asymptotic Teichmüller space, geodesic segment, Finsler structure, Boundary dilatation

Abstract:

The geometry of Teichmüller metric in an asymptotic Teichmüller space is studied in this article. First, a binary infinitesimal form of Teichmüller metric on AT(X) is proved. Then, the notion of angles between two geodesic curves in the asymptotic Teichmüller space AT(X) is introduced. The existence of such angles is proved and the explicit formula is obtained. As an application, a sufficient condition for non-uniqueness geodesics in AT(X) is obtained.

Key words: Angles of asymptotic Teichmüller space, geodesic segment, Finsler structure, Boundary dilatation

中图分类号: 

  • 32G15