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arXiv 1104.5186stat.MLcs.ITmath.IT
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通过“低秩+稀疏”分解寻找密集簇

Finding Dense Clusters via "Low Rank + Sparse" Decomposition

Samet Oymak, Babak Hassibi

摘要:

在图中寻找“密集连接簇”通常是文献\cite{Schaeffer}中一个重要且研究得很好的问题。它在模式识别、社交网络和数据挖掘\cite{Duda,Mishra}中有各种应用。最近,Ames和Vavasis提出了一种新的方法,通过使用凸优化图的邻接矩阵\cite{Ames, Ames2}的图中的团。此外,在将给定矩阵分解成其“低秩”和“稀疏”分量\cite{Candes, Chandra}方面也有最近的进展。在本文中,受这些结果的启发,我们认为“密集连接的集群”作为不完美的集团,不完美对应缺失的边缘,这是相对稀疏的。我们分析的问题,在概率设置,旨在检测不相交种植集群。我们的主要结果基本上表明,只要簇足够大,就可以在图中找到\emph{dense}簇。最后,我们讨论了可能的扩展和未来的研究方向。

英文摘要:

Finding "densely connected clusters" in a graph is in general an important and well studied problem in the literature \cite{Schaeffer}. It has various applications in pattern recognition, social networking and data mining \cite{Duda,Mishra}. Recently, Ames and Vavasis have suggested a novel method for finding cliques in a graph by using convex optimization over the adjacency matrix of the graph \cite{Ames, Ames2}. Also, there has been recent advances in decomposing a given matrix into its "low rank" and "sparse" components \cite{Candes, Chandra}. In this paper, inspired by these results, we view "densely connected clusters" as imperfect cliques, where imperfections correspond missing edges, which are relatively sparse. We analyze the problem in a probabilistic setting and aim to detect disjointly planted clusters. Our main result basically suggests that, one can find \emph{dense} clusters in a graph, as long as the clusters are sufficiently large. We conclude by discussing possible extensions and future research directions.

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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