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arXiv math/0612827math.PRmath.CO
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随机图的$k$ -核的渐近正态性

Asymptotic normality of the $k$-core in random graphs

Svante Janson, Malwina J. Luczak

摘要:

研究了具有给定度序列的$n$顶点的随机(多)图的$k$ -核。在我们以前的论文[Random Structures Algorithms 30(2007)50- 62]中,我们使用独立随机变量的经验分布的性质给出了一个简单的证明,证明了巨$k$ -核的大小服从大数定律,如${n\to \infty}$。在这里,我们进一步发展的方法,并表明,周围的确定性限制的波动收敛到高斯定律以上和附近的阈值,并在阈值的非正常的法律。此外,我们精确地确定了一个巨大的$k$核心的出现的相变窗口的位置。因此,我们推导出相应的结果为核心的$k$在$G(n,p)$和$G(n,m)$。

英文摘要:

We study the $k$-core of a random (multi)graph on $n$ vertices with a given degree sequence. In our previous paper [Random Structures Algorithms 30 (2007) 50--62] we used properties of empirical distributions of independent random variables to give a simple proof of the fact that the size of the giant $k$-core obeys a law of large numbers as ${n\to \infty}$. Here we develop the method further and show that the fluctuations around the deterministic limit converge to a Gaussian law above and near the threshold, and to a non-normal law at the threshold. Further, we determine precisely the location of the phase transition window for the emergence of a giant $k$-core. Hence, we deduce corresponding results for the $k$-core in $G(n,p)$ and $G(n,m)$.

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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