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Open Access

Core Decomposition and Maintenance in Bipartite Graphs

School of Computer Science and Technology, Shandong University, Qingdao 266237, China
Department of Computer Science, Georgia State University, Atlanta, GA 30303, USA
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The prevalence of graph data has brought a lot of attention to cohesive and dense subgraph mining. In contrast with the large number of indexes proposed to help mine dense subgraphs in general graphs, only very few indexes are proposed for the same in bipartite graphs. In this work, we present the index called α(β)-core number on vertices, which reflects the maximal cohesive and dense subgraph a vertex can be in, to help enumerate the (α,β)-cores, a commonly used dense structure in bipartite graphs. To address the problem of extremely high time and space cost for enumerating the (α,β)-cores, we first present a linear time and space algorithm for computing the α(β)-core numbers of vertices. We further propose core maintenance algorithms, to update the core numbers of vertices when a graph changes by avoiding recalculations. Experimental results on different real-world and synthetic datasets demonstrate the effectiveness and efficiency of our algorithms.


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Tsinghua Science and Technology
Pages 292-309
Cite this article:
Yu D, Zhang L, Luo Q, et al. Core Decomposition and Maintenance in Bipartite Graphs. Tsinghua Science and Technology, 2023, 28(2): 292-309.








Web of Science






Received: 12 October 2021
Revised: 16 November 2021
Accepted: 19 November 2021
Published: 29 September 2022
© The author(s) 2023.

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