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arXiv 2009.07538math.GTmath.DGmath.PR
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随机曲面上分离闭测地线长度的大亏格渐近性

Large genus asymptotics for lengths of separating closed geodesics on random surfaces

Xin Nie, Yunhui Wu, Yuhao Xue

AI总结:

本文研究了模空间上关于 Weil-Petersson 测度的随机双曲曲面几何量,证明了当亏格趋于无穷时分离 systole、半领子宽度和最短分离闭多重测地线长度的渐近行为,并讨论了相关极值量的渐近性质。

摘要:

本文研究了亏格为 $g$ 的随机双曲曲面在模空间 $\mathcal{M}_g$ 上关于 Weil-Petersson 测度的基本几何量。我们证明了当 $g$ 趋于无穷大时,一般曲面 $X\in \mathcal{M}_g$ 渐近满足:(1) $X$ 的分离 systole 约为 $2\log g$;(2) 在 $X$ 的分离 systolic 曲线周围存在宽度约为 $\frac{\log g}{2}$ 的半领子;(3) $X$ 的最短分离闭多重测地线长度约为 $2\log g$。作为应用,我们还讨论了当 $g$ 趋于无穷大时,极值分离 systole、非简单 systole 以及最短分离闭多重测地线长度期望值的渐近行为。

英文摘要:

In this paper, we investigate basic geometric quantities of a random hyperbolic surface of genus $g$ with respect to the Weil-Petersson measure on the moduli space $\mathcal{M}_g$. We show that as $g$ goes to infinity, a generic surface $X\in \mathcal{M}_g$ satisfies asymptotically: (1) the separating systole of $X$ is about $2\log g$; (2) there is a half-collar of width about $\frac{\log g}{2}$ around a separating systolic curve of $X$; (3) the length of shortest separating closed multi-geodesics of $X$ is about $2\log g$. As applications, we also discuss the asymptotic behavior of the extremal separating systole, the non-simple systole and the expectation value of lengths of shortest separating closed multi-geodesics as $g$ goes to infinity.

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