Angles in Teichmuller spaces
Angles in Teichmuller spaces
复制标题
泰希米勒空间中的角度
DOI:
10.1016/j.jmaa.2020.123879
复制
发表时间:
2020
影响因子:
1.3
通讯作者:
Yang Wen
中科院分区:
文献类型:
--
作者:
Yang Wen
We prove that, in any infinite dimensional or asymptotic Teichmüller space, the angles between Teichmüller geodesic rays issuing from a common point, defined by using the law of cosines, do not always exist. As a consequence, any infinite dimensional or asymptotic Teichmüller space equipped with the Teichmüller metric is not a CAT (κ) space for any κ∈ R. We also establish a sufficient condition for the angles not to always exist in a Finsler manifold, and apply it to study the Hilbert metrics.