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arXiv 2406.15428physics.soc-ph
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网络中的同配性

Assortativity in networks

Fei Ma

AI总结:

本文研究网络度-度相关性的同配系数 $r$,修正其取值范围,分析基于边的迭代操作对同配性的影响,并构造增长的同配与中性网络及不同阶中性非树图。

摘要:

度-度相关性对于理解网络的结构性质以及发生在网络上的动力学至关重要,通常用同配系数 $r$ 来衡量。本文首先详细研究了这一测度,并得出结论:$r$ 属于非对称区间 $[-1,1)$,而不是被广泛引用的 $[-1,1]$。其中,我们验证了星形网络是唯一达到指标 $r$ 下界的树形网络。接下来,我们得到:若种子模型具有负的 $r$,则基于几种广泛使用的基于边的迭代操作所得到的所有网络都是异配的;同时还生成了一族增长的中性网络。然后,我们提出一种基于边的迭代操作,用于在种子为同配时构造增长的同配网络,并进一步将其扩展,使其在一般情形下也能良好工作。最后,我们建立了中性树形网络存在的一个充分条件,据此不仅首次找出了任意阶中性树形网络的一个代表,而且也首次创建了增长的中性树形网络。此外,当 $n\rightarrow\infty$ 时,我们得到了 $8n/9$ 个不同阶的中性非树图。

英文摘要:

The degree-degree correlation is crucial in understanding the structural properties of and dynamics occurring upon network, and is often measured by the assortativity coefficient $r$. In this paper, we first study this measure in detail and conclude that $r$ belongs to an asymmetric range $[-1,1)$ rather than the widely-cited $[-1,1]$. Among which, we verify that star is the unique tree network that achieves the lower bound of index $r$. Next, we obtain that all the resultant networks based on several widely-used kinds of edge-based iterative operations are disassortative if seed model has negative $r$, and also generate a family of growing neutral networks. Then, we propose an edge-based iterative operation to construct growing assortative network when seed is assortative, and further extend it to work well in general setting. Lastly, we establish a sufficient condition for existence of neutral tree network, accordingly, not only find out a representative of any order neutral tree network for the first time, but also are the first to create growing neutral tree networks as well. Also, we obtain $8n/9$ neutral non-tree graphs of distinct order as $n\rightarrow\infty$.

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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