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arXiv 1807.09043math.PR
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黎曼流形上Poisson-Voronoi胞腔的平均渐近性

Mean asymptotics for a Poisson-Voronoi cell on a Riemannian manifold

Pierre Calka, Aurélie Chapron, Nathanaël Enriquez

摘要:

本文考虑一个黎曼流形$M$和由一个不动点$x_0$和一个强度为$λ$的Poisson点过程在$M$上并生成的Poisson-Voronoi镶嵌.我们获得渐近展开到二阶的Voronoi细胞与$x_0$,包括它的体积和顶点数的几个特征的手段。在每种情况下,估计的第一项等于欧几里得设置中的平均特征,而第二项可以包含在$x_0$处的$M$的特定曲率:在顶点的平均数量的情况下的数量曲率,在顶点的密度的情况下的里奇曲率,以及在Voronoi单元的截面的体积和顶点的数量的情况下的截面曲率。在常曲率的特殊情况下,还导出了几个显式公式。证明这些结果的关键工具是一个新的变量变换公式的Blaschke-Petkantschin型在黎曼设置。最后,从二维曲面细分顶点总数的渐近估计出发,给出了Gauss-Bonnet定理的概率证明。

英文摘要:

In this paper, we consider a Riemannian manifold $M$ and the Poisson-Voronoi tessellation generated by the union of a fixed point $x_0$ and a Poisson point process of intensity $λ$ on $M$. We obtain asymptotic expansions up to the second order for the means of several characteristics of the Voronoi cell associated with $x_0$, including its volume and number of vertices. In each case, the first term of the estimate is equal to the mean characteristic in the Euclidean setting while the second term may contain a particular curvature of $M$ at $x_0$: the scalar curvature in the case of the mean number of vertices, the Ricci curvature in the case of the density of vertices and the sectional curvatures in the cases of the volume and number of vertices of a section of the Voronoi cell. Several explicit formulas are also derived in the particular case of constant curvature. The key tool for proving these results is a new change of variables formula of Blaschke-Petkantschin type in the Riemannian setting. Finally, a probabilistic proof of the Gauss-Bonnet Theorem is deduced from the asymptotic estimate of the total number of vertices of the tessellation in dimension two.

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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