Towards k-vertex connected component discovery from large networks

  • Yuan LiEmail author
  • Guoren Wang
  • Yuhai Zhao
  • Feida Zhu
  • Yubao Wu
Part of the following topical collections:
  1. Special Issue on Graph Data Management in Online Social Networks


In many real life network-based applications such as social relation analysis, Web analysis, collaborative network, road network and bioinformatics, the discovery of components with high connectivity is an important problem. In particular, k-edge connected component (k-ECC) has recently been extensively studied to discover disjoint components. Yet many real scenarios present more needs and challenges for overlapping components. In this paper, we propose a k-vertex connected component (k-VCC) model, which is much more cohesive, and thus supports overlapping between components very well. To discover k-VCCs, we propose three frameworks including top-down, bottom-up and hybrid frameworks. The top-down framework is first developed to find the exact k-VCCs by dividing the whole network. To further reduce the high computational cost for input networks of large sizes, a bottom-up framework is then proposed to locally identify the seed subgraphs, and obtain the heuristic k-VCCs by expanding and merging these seed subgraphs. Finally, the hybrid framework takes advantages of the above two frameworks. It exploits the results of bottom-up framework to construct the well-designed mixed graph and then discover the exact k-VCCs by contracting the mixed graph in a top-down way. Because the size of mixed graph is smaller than the original network, the hybrid framework runs much faster than the top-down framework. Comprehensive experimental are conducted on large real and synthetic networks and demonstrate the efficiency and effectiveness of the proposed exact and heuristic approaches.


k-vertex connected component(k-VCC) Component detection Large network 



This research is partially supported by the National NSFC (61672041, 61772124, 61732003,61902004,61977001), National Key Research and Development Program of China (2018YFB1004402), the Start-up Funds of North China University of Technology, and the National Research Foundation, Prime Ministers Office, Singapore under its International Research Centres in Singapore Funding Initiative and the Pinnacle lab for Analytics at SMU.


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Authors and Affiliations

  1. 1.North China University of TechnologyBeijingChina
  2. 2.Beijing Institute of TechnologyBeijingChina
  3. 3.Northeastern UniversityShenyangChina
  4. 4.Singapore Management UniversitySingaporeSingapore
  5. 5.Georgia State UniversityAtlantaUSA

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