arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2108.02091cs.SImath.AT
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用代数拓扑捕捉连接强度

Capturing Tie Strength with Algebraic Topology

Arnab Sarker, Jean-Baptiste Seby, Austin R. Benson, Ali Jadbabaie

AI总结:

本文利用代数拓扑提出三种度量高阶网络中连接强度的指标,并构建一种综合中心性度量,在15个数据集上优于标准代理指标,揭示了弱连接的信息优势。

摘要:

连接强度与社会结构之间的关联是社会科学中的一个基本课题。我们通过分析高阶网络中的连接强度来研究这种关联,高阶网络是一种日益相关的模型,能够编码三个或更多个体之间的群体互动。首先,我们引入了三种基于代数拓扑的度量,这些度量刻画了网络上下文以及边的影响。我们在15个数据集上的实验结果表明,这些度量在估计连接强度方面优于标准的网络代理指标。我们进一步发现,这些度量能够复现并解释一个谜题,即某些桥接连接出乎意料地强。然后,我们考虑了一种单一的中心性度量,它结合了最初的三个度量,与连接强度呈高度负相关,并且可以通过一个信息交换过程来解释,该过程突出了那些能够获取有用信息的连接。在这个意义上,我们能够阐明弱连接因其网络位置而拥有的信息优势。

英文摘要:

The association between tie strength and social structure is a fundamental topic in the social sciences. We study this association by analyzing tie strength in higher-order networks, an increasingly relevant model which can encode group interactions between three or more individuals. First, we introduce three measures based on algebraic topology which characterize the network context and influence of an edge. Our experimental results across 15 datasets indicate that these measures outperform standard network proxies in estimating tie strength. We further find that these measures can replicate and explain a puzzle wherein certain bridging ties are surprisingly strong. We then consider a single centrality measure which combines the three initial measures, is highly inversely related to tie strength, and can be interpreted through an information exchange process which highlights ties that have access to useful information. In this sense, we are able to illuminate the information advantages of weak ties due to their network position.

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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