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arXiv 2201.11920math.PRmath-phmath.COmath.MP
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UIPT上的渗流概率和临界指数

Percolation probability and critical exponents for site percolation on the UIPT

Laurent Ménard

摘要:

在均匀无限平面三角剖分(UIPT)上,导出了伯努利点渗流的三个临界指数。首先,我们明确计算根簇是无限的概率。因此,我们表明,非临界指数为现场渗流的UIPT是$β= 1/2$。然后,我们建立了根簇顶点数的生成函数的积分公式。我们使用这个公式来证明,在临界状态下,根簇至少有$n$顶点的概率像$n^{-1/7}$一样衰减。最后,我们还推导出一个表达式的法律的根集群的周长,并使用它来建立,在临界状态下,概率的根集群的周长等于$n$像$n^{-4/3}$衰减。在这三个指数中,只有最后一个是以前已知的。我们的主要工具是所谓的垫圈分解的渗滤集群,随机玻尔兹曼映射的一般属性,以及分析组合学。

英文摘要:

We derive three critical exponents for Bernoulli site percolation on the on the Uniform Infinite Planar Triangulation (UIPT). First we compute explicitly the probability that the root cluster is infinite. As a consequence, we show that the off-critical exponent for site percolation on the UIPT is $β= 1/2$. Then we establish an integral formula for the generating function of the number of vertices in the root cluster. We use this formula to prove that, at criticality, the probability that the root cluster has at least $n$ vertices decays like $n^{-1/7}$. Finally, we also derive an expression for the law of the perimeter of the root cluster and use it to establish that, at criticality, the probability that the perimeter of the root cluster is equal to $n$ decays like $n^{-4/3}$. Among these three exponents, only the last one was previously known. Our main tools are the so-called gasket decomposition of percolation clusters, generic properties of random Boltzmann maps, as well as analytic combinatorics.

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