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arXiv 0807.4904math.PRmath.CO
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具有次线性偏好连接的随机网络:度演化

Random networks with sublinear preferential attachment: Degree evolutions

Steffen Dereich, Peter Morters

摘要:

我们定义了一个随机网络的动态模型,其中新的顶点连接到旧的概率成比例的次线性函数的程度。我们首先给出了一个强的极限定律的经验度分布,然后有一个更仔细地看在时间演化的各个顶点的程度,我们描述的大和适度的偏差原则。利用这些结果,我们揭示了一个有趣的相变:在大程度的强偏好的情况下,最终出现一个单一的顶点永远作为顶点的最大程度,而在弱偏好的情况下,顶点的最大程度是不断变化的。不严格地说,两个阶段之间的过渡发生在新边以与其当前度的根成比例的概率连接到现有顶点的情况下。

英文摘要:

We define a dynamic model of random networks, where new vertices are connected to old ones with a probability proportional to a sublinear function of their degree. We first give a strong limit law for the empirical degree distribution, and then have a closer look at the temporal evolution of the degrees of individual vertices, which we describe in terms of large and moderate deviation principles. Using these results, we expose an interesting phase transition: in cases of strong preference of large degrees, eventually a single vertex emerges forever as vertex of maximal degree, whereas in cases of weak preference, the vertex of maximal degree is changing infinitely often. Loosely speaking, the transition between the two phases occurs in the case when a new edge is attached to an existing vertex with a probability proportional to the root of its current degree.

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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