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arXiv math/0510446math.PRcond-mat.dis-nnmath.CO
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具有超线性偏好连接的网络中的连通性转移

Connectivity transitions in networks with super-linear preferential attachment

Roberto Oliveira, Joel Spencer

摘要:

我们分析了Krapivsky和Redner的一个不断发展的网络模型,其中新节点顺序到达,每个节点连接到先前存在的节点b的概率与b的入度的p次幂成正比。我们限制到超线性情况p>1。当1+1/k< p \leq 1 + 1/(k-1)时,最终可数树的结构就确定了。有一个有限树T,其上有一个特殊的v(它有一个极限分布),它被“粘”在一个特定的无限树上。v有无限个孩子,其中无限个孩子有k-1个孩子,并且只有有限个节点(可能只有v)有k个或更多孩子。我们的基本技术是使用指数随机变量将离散过程嵌入到连续时间过程中,这种技术以前曾用于研究具有反馈的球箱过程。

英文摘要:

We analyze an evolving network model of Krapivsky and Redner in which new nodes arrive sequentially, each connecting to a previously existing node b with probability proportional to the p-th power of the in-degree of b. We restrict to the super-linear case p>1. When 1+1/k< p \leq 1 + 1/(k-1) the structure of the final countable tree is determined. There is a finite tree T with distinguished v (which has a limiting distribution) on which is "glued" a specific infinite tree. v has an infinite number of children, an infinite number of which have k-1 children, and there are only a finite number of nodes (possibly only v) with k or more children. Our basic technique is to embed the discrete process in a continuous time process using exponential random variables, a technique that has previously been employed in the study of balls-in-bins processes with feedback.

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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