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arXiv 1708.03120math.STmath.PRstat.TH
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关于graphex过程的稀疏性、幂律与聚类性质

On sparsity, power-law and clustering properties of graphex processes

François Caron, Francesca Panero, Judith Rousseau

AI总结:

本文研究基于可交换点过程的graphex图模型,刻画了边数、节点数与度分布的四种渐近状态,证明了聚类系数的收敛性并推导节点数的中心极限定理,还提出可分别控制潜在结构与全局稀疏性/幂律性质的模型类。

摘要:

本文研究基于可交换点过程的图类的性质。我们给出了边数、节点数和度分布的渐近表达式,识别出四种状态:(i) 稠密状态,(ii) 稀疏但几乎稠密的状态,(iii) 具有幂律行为的稀疏状态,以及 (iv) 几乎极度稀疏的状态。我们证明,在温和假设下,全局聚类系数和局部聚类系数都收敛到常数,且这两个常数可能相同也可能不同。我们还推导了节点数的中心极限定理。最后,我们在该框架内提出一类模型,其中可以分别控制图的潜在结构以及全局稀疏性/幂律性质。

英文摘要:

This paper investigates properties of the class of graphs based on exchangeable point processes. We provide asymptotic expressions for the number of edges, number of nodes and degree distributions, identifying four regimes: (i) a dense regime, (ii) a sparse almost dense regime, (iii) a sparse regime with power-law behaviour, and (iv) an almost extremely sparse regime. We show that under mild assumptions, both the global and local clustering coefficients converge to constants which may or may not be the same. We also derive a central limit theorem for the number of nodes. Finally, we propose a class of models within this framework where one can separately control the latent structure and the global sparsity/power-law properties of the graph.

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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