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arXiv 2210.07136math.GTmath.GR
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曼哈顿测地线与双曲群度量结构空间的边界

Manhattan geodesics and the boundary of the space of metric structures on hyperbolic groups

Stephen Cantrell, Eduardo Reyes

AI总结:

本文为双曲群度量结构空间构造外自同构不变的测地线双梳及其边界,证明其包含多种伪度量,并由此得到长度谱刚性、正则性、增长率等结果,否定 Bonahon 猜想。

摘要:

对于任意非初等双曲群 $Γ$,我们在配备有 Techimüller 空间上 Thurston 度量的对称化版本的度量结构空间上,找到了一个外自同构不变的测地线双梳。我们构造并研究了该空间的边界,并证明该边界包含许多著名的伪度量,包括来自在 $\ ext{CAT}(0)$ 立方复形、实树和锥化 Cayley 图上的作用的伪度量。作为推论,我们推导出长度谱刚性结果、曼哈顿曲线的正则性结果、Anosov 表示的最优增长率结果,以及平移距离函数到测地流空间上的连续延拓结果。利用我们关于测地流的结果,我们否定了 Bonahon 的一个猜想。

英文摘要:

For any non-elementary hyperbolic group $Γ$, we find an outer automorphism invariant geodesic bicombing for the space of metric structures on $Γ$ equipped with a symmetrized version of the Thurston metric on Techimüller space. We construct and study a boundary for this space and show that it contains many well-known pseudo metrics including those coming from actions on $\text{CAT}(0)$ cube complexes, real trees and coned-off Cayley graphs. As corollaries we deduce length spectrum rigidity results, regularity results for Manhattan curves, optimal growth rate results for Anosov representations and results regarding continuous extensions of translation distance functions to the space of geodesic currents. Using our results for geodesic currents we settle a conjecture of Bonahon in the negative.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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