Gromov乘积的几何：Teichmüller空间无穷远处的几何
Geometry of the Gromov product : Geometry at infinity of Teichmüller space
摘要：
本文主要研究度量空间上的变换。这是在努力产生定性版本的拟等距，考虑到渐近行为的Gromov产品在双曲空间。我们利用曲线复形的单纯自同构刻画了Teichmüller空间上这类变换的商半群，并且我们将看到，这类变换被认为是在无穷远处刚性的Teichmüller空间上等距的“粗化”。我们还证明了一个双曲特征，即任何有限维Teichmüller空间不允许（准）可逆粗糙对合。
英文摘要：
This paper is devoted to study of transformations on metric spaces. It is done in an effort to produce qualitative version of quasi-isometries which takes into account the asymptotic behavior of the Gromov product in hyperbolic spaces. We characterize a quotient semigroup of such transformations on Teichmüller space by use of simplicial automorphisms of the complex of curves, and we will see that such transformation is recognized as a "coarsification" of isometries on Teichmüller space which is rigid at infinity. We also show a hyperbolic characteristic that any finite dimensional Teichmüller space does not admit (quasi)-invertible rough-homothety.
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