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arXiv 2101.02249physics.soc-ph
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双曲网络的固有社团结构

The inherent community structure of hyperbolic networks

Bianka Kovács, Gergely Palla

摘要:

双曲模型提供了一种借助随机图来把握真实网络相关统计特征的显着方法,其核心思想是将节点放置在低维双曲空间中,并以取决于双曲距离的概率连接节点对。人们普遍认为,这些模型可以同时生成小世界、高度聚集和无标度的随机图;因此,再现了真实网络的最基本的共同特征。在目前的工作中,我们专注于知名度相似性优化(PSO)模型和$\mathbb{S}^1/\mathbb{H}^2$模型从这个模型家族,即这些方法产生的网络也包含社区的参数范围很广,这当然不是一个意图在设计的模型。我们使用成熟的社区发现方法,如Louvain,Infomap和标签传播,从所研究的网络中提取社区。观察到的高模块化值表明,社区结构在某些条件下可以变得非常明显。此外,由不同算法发现的模块显示出良好的一致性,这意味着这些模块确实是相关的和明显的结构单元。由于社区的出现在代表真实系统的网络中也很常见,双曲模型的这一特征使它们比以前想象的更适合描述真实网络。

英文摘要:

A remarkable approach for grasping the relevant statistical features of real networks with the help of random graphs is offered by hyperbolic models, centred around the idea of placing nodes in a low-dimensional hyperbolic space, and connecting node pairs with a probability depending on the hyperbolic distance. It is widely appreciated that these models can generate random graphs that are small-world, highly clustered and scale-free at the same time; thus, reproducing the most fundamental common features of real networks. In the present work, we focus on a less well-known property of the popularity-similarity optimisation (PSO) model and the $\mathbb{S}^1/\mathbb{H}^2$ model from this model family, namely that the networks generated by these approaches also contain communities for a wide range of the parameters, which was certainly not an intention at the design of the models. We extracted the communities from the studied networks using well-established community finding methods such as Louvain, Infomap and label propagation. The observed high modularity values indicate that the community structure can become very pronounced under certain conditions. In addition, the modules found by the different algorithms show good consistency, implying that these are indeed relevant and apparent structural units. Since the appearance of communities is rather common in networks representing real systems as well, this feature of hyperbolic models makes them even more suitable for describing real networks than thought before.

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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