arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1503.06150math.PRmath.CO
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离散和连续时间偏好依恋模型的随机图

Random Graphs Associated to some Discrete and Continuous Time Preferential Attachment Models

Angelica Pachon, Federico Polito, Laura Sacerdote

摘要:

我们给出了一个共同的描述西蒙,Barabási-阿尔伯特,II-PA和价格增长模型,通过引入合适的随机图过程与优惠的附件机制。通过II-PA模型,证明了Barabási-Albert模型的渐近度分布与Simon模型的渐近入度分布一致的条件.进一步证明了当Simon模型(含参数$α$)的顶点数趋于无穷大时,其中一部分顶点的行为与含参数$(λ,β) = (1-α,1)$的Yule模型相似,并通过这种关系解释了Simon模型中随机顶点的渐近性质与Yule模型中随机亏格的渐近性质一致的原因.作为我们分析的副产品,我们证明了II-PA模型的入度分布的显式表达式,在\cite{Newman2005}中没有证明。这些模型的传统和最近的应用参考也进行了讨论。

英文摘要:

We give a common description of Simon, Barabási--Albert, II-PA and Price growth models, by introducing suitable random graph processes with preferential attachment mechanisms. Through the II-PA model, we prove the conditions for which the asymptotic degree distribution of the Barabási--Albert model coincides with the asymptotic in-degree distribution of the Simon model. Furthermore, we show that when the number of vertices in the Simon model (with parameter $α$) goes to infinity, a portion of them behave as a Yule model with parameters $(λ,β) = (1-α,1)$, and through this relation we explain why asymptotic properties of a random vertex in Simon model, coincide with the asymptotic properties of a random genus in Yule model. As a by-product of our analysis, we prove the explicit expression of the in-degree distribution for the II-PA model, given without proof in \cite{Newman2005}. References to traditional and recent applications of the these models are also discussed.

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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