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arXiv 1209.3036math.PR
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二维首次通过渗流中的Busemann函数和无限测地线

Busemann functions and infinite geodesics in two-dimensional first-passage percolation

Michael Damron, Jack Hanson

摘要:

我们研究了Z2上的首次通过渗流,其中边权由一个遍历-遍历分布给出,解决了与无限测地线的存在性和合并有关的问题。90年代后期,C. Newman和合作者在强假设下对极限形状和权重分布进行了研究。在本文中,我们开发了一个框架的工作与布斯曼函数的分布极限,并用它来证明形式的纽曼的结果在最小的假设。例如,我们展示了在任何确定性方向上长的有限测地线的合并形式。我们还引入了一个纯粹的方向条件,取代纽曼的全球曲率条件,我们表明,其假设意味着存在的方向测地线。在没有这个条件的情况下,我们证明了在扇区中定向的无限测地线的存在性。最后,我们分析了测地图的分布极限,证明了几乎必然合并和不存在无限向后路。这一结果与不存在“双测线”的猜想有关。"

英文摘要:

We study first-passage percolation on Z2, where the edge weights are given by a translation-ergodic distribution, addressing questions related to existence and coalescence of infinite geodesics. Some of these were studied in the late 90's by C. Newman and collaborators under strong assumptions on the limiting shape and weight distribution. In this paper we develop a framework for working with distributional limits of Busemann functions and use it to prove forms of Newman's results under minimal assumptions. For instance, we show a form of coalescence of long finite geodesics in any deterministic direction. We also introduce a purely directional condition which replaces Newman's global curvature condition and whose assumption we show implies the existence of directional geodesics. Without this condition, we prove existence of infinite geodesics which are directed in sectors. Last, we analyze distributional limits of geodesic graphs, proving almost-sure coalescence and nonexistence of infinite backward paths. This result relates to the conjecture of nonexistence of "bigeodesics."

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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