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arXiv 2609.05297math.PR

随机正则有向图的定向Kesten--McKay定律

The oriented Kesten--McKay law for random regular digraphs

  • Shanghai Center for Mathematical Sciences, Fudan University(复旦大学上海数学中心)
  • Department of Statistics and Data Science, University of Pensylvannia(宾夕法尼亚大学统计与数据科学系)

机构由 AI 辅助整理,请以论文原文为准。

Yukun He, Jiaoyang Huang

AI总结:

该研究针对N个顶点的随机d-正则有向图,通过最小奇异值的小球概率估计等技术,证明其经验特征值密度依概率收敛到定向Kesten--McKay定律。

AI中文摘要:

我们考虑N个顶点上的随机d-正则有向图的邻接矩阵。对于固定的d≥2,当N→∞时,我们证明经验特征值密度依概率收敛到定向Kesten--McKay定律。关键技术输入是最小奇异值的小球概率估计,证明结合了固定秩转置论证与移位逆压缩的有限域反集中方法。我们还证明了多项式硬边估计,该估计使我们能从消失的小球概率中推导出全局定律。

英文摘要:

We consider the adjacency matrix of a random directed $d$-regular graph on $N$ vertices. For fixed $d\geq 2$, we prove that the empirical eigenvalue density converges in probability to the oriented Kesten--McKay law as $N\to \infty$. The key technical input is the small-ball probability estimate for the smallest singular value. The proof combines a fixed-rank transposition argument with finite-field anticoncentration for shifted inverse compressions. We also prove a polynomial hard-edge estimate, which allows us to deduce the global law from the vanishing small-ball probability.

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