### Abstract

In this paper, we study how to find maximal k-edge-connected subgraphs from a large graph. k-edge-connected subgraphs can be used to capture closely related vertices, and finding such vertex clusters is interesting in many applications, e. g., social network analysis, bioinformatics, web link research. Compared with other explicit structures for modeling vertex clusters, such as quasi-clique, k-core, which only set the requirement on vertex degrees, k-edge-connected subgraph further requires high connectivity within a subgraph (a stronger requirement), and hence defines a more closely related vertex cluster. To find maximal k-edge-connected subgraphs from a graph, a basic approach is to repeatedly apply minimum cut algorithm to the connected components of the input graph until all connected components are k-connected. However, the basic approach is very expensive if the input graph is large. To tackle the problem, we propose three major techniques: vertex reduction, edge reduction and cut pruning. These speed-up techniques are applied on top of the basic approach. We conduct extensive experiments and show that the speed-up techniques are very effective. © 2012 ACM.

Original language | English |
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Title of host publication | Advances in Database Technology - EDBT 2012 |

Subtitle of host publication | 15th International Conference on Extending Database Technology, Proceedings |

Place of Publication | USA |

Publisher | Elsevier |

Pages | 480-491 |

Number of pages | 12 |

ISBN (Print) | 9781450307901 |

DOIs | |

Publication status | Published - 2012 |

Externally published | Yes |

Event | 15th International Conference on Extending Database Technology - Berlin, Germany Duration: 27 Mar 2012 → 30 Mar 2012 |

### Conference

Conference | 15th International Conference on Extending Database Technology |
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Country | Germany |

City | Berlin |

Period | 27/03/12 → 30/03/12 |

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## Cite this

Zhou, R., Liu, C., Yu, J. X. X., Liang, W., Chen, B., & Li, J. (2012). Finding maximal k-edge-connected subgraphs from a large graph. In

*Advances in Database Technology - EDBT 2012: 15th International Conference on Extending Database Technology, Proceedings*(pp. 480-491). Elsevier. https://doi.org/10.1145/2247596.2247652