Angle geometry in asymptotic Teichmüller spaces

Angle geometry in asymptotic Teichmüller spaces
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渐近 Teichmüller 空间中的角度几何

DOI:
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发表时间:
2017-03
影响因子:
1.3
通讯作者:
Qi Yi
Qi Yi
中科院分区:
数学3区
文献类型:
--
作者:
Wu Yan;Qi Yi

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研究了渐近 Teichmüller 空间的角几何。虽然已经证明以AT(X)为基点的任意两条测地射线之间的夹角总是存在,但本文表明存在无穷多对相交的测地线段,使得它们之间的夹角不存在。还研究了测地三角形的内角和。证明对于0到3π之间的任意数,AT(X)中都存在一个测地三角形,且其内角之和等于该数。
The angular geometry of asymptotic Teichmüller spaces is studied. Although it has been proved that the angles between any two geodesic rays from the base point of AT(X) always exist, it is shown in this paper that there are infinitely many pairs of intersecting geodesic segments such that the angles between them do not exist. The sums of inner angles of geodesic triangles are also studied. It is proved that for any number from 0 to 3π there exists a geodesic triangle in AT(X) such that the sum of its inner angles is equal to such a number.
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