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arXiv 2002.00775cs.SI
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求符号网络中的大型平衡子图

Finding large balanced subgraphs in signed networks

Bruno Ordozgoiti, Antonis Matakos, Aristides Gionis

摘要:

有符号网络是边缘标记有正号或负号的图,可用于捕获无符号网络所错过的交互中的细微差别。符号图论中的平衡概念决定了一个网络是否可以被划分为两个完全相反的子集,因此对于建模社交网络中存在极化社区等现象非常有用。虽然确定一个图是否平衡很容易,但找到一个大的平衡子图是困难的。文献中用于此目的的几种方法要么无效,要么不可扩展。本文提出了一个在符号网络中寻找大型平衡子图的有效算法。该算法依赖于符号谱理论和一个新的边界的扰动图拉普拉斯算子。在各种各样的实验中,对真实世界的数据,我们表明,我们的算法可以找到平衡的子图比现有的方法检测到的大得多,此外,它是更快的。我们测试其可扩展性高达34万边缘的图形。

英文摘要:

Signed networks are graphs whose edges are labelled with either a positive or a negative sign, and can be used to capture nuances in interactions that are missed by their unsigned counterparts. The concept of balance in signed graph theory determines whether a network can be partitioned into two perfectly opposing subsets, and is therefore useful for modelling phenomena such as the existence of polarized communities in social networks. While determining whether a graph is balanced is easy, finding a large balanced subgraph is hard. The few heuristics available in the literature for this purpose are either ineffective or non-scalable. In this paper we propose an efficient algorithm for finding large balanced subgraphs in signed networks. The algorithm relies on signed spectral theory and a novel bound for perturbations of the graph Laplacian. In a wide variety of experiments on real-world data we show that our algorithm can find balanced subgraphs much larger than those detected by existing methods, and in addition, it is faster. We test its scalability on graphs of up to 34 million edges.

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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