### 抜粋

In the context of designing a scalable overlay network to support decentralized topic-based pub/sub communication, the Minimum Topic-Connected Overlay problem (Min-TCO in short) has been investigated: Given a set of t topics, collection of n users together with the lists of topics they are interested in, the aim is to connect these users to a network by a minimum number of edges such that every graph induced by users interested in a common topic is connected. It is known that Min-TCO is NP-hard and approximable within O(logt) in polynomial time. In this paper, we further investigate the problem and some of its special instances. We give various hardness results for instances where the number of users interested in a common topic is constant, and also for the instances where the number of topics in which an user is interested in is bounded by a constant. Furthermore, we close the gap of hardness of Min-TCO by showing its LOGAPX-completeness. We also present a few polynomial-time algorithms for very restricted instances of Min-TCO.

元の言語 | 英語 |
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ホスト出版物のタイトル | Mathematical Foundations of Computer Science 2011 - 36th International Symposium, MFCS 2011, Proceedings |

ページ | 376-387 |

ページ数 | 12 |

DOI | |

出版物ステータス | 出版済み - 9 1 2011 |

イベント | 36th International Symposium on Mathematical Foundations of Computer Science, MFCS 2011 - Warsaw, ポーランド 継続期間: 8 22 2011 → 8 26 2011 |

### 出版物シリーズ

名前 | Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) |
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巻 | 6907 LNCS |

ISSN（印刷物） | 0302-9743 |

ISSN（電子版） | 1611-3349 |

### その他

その他 | 36th International Symposium on Mathematical Foundations of Computer Science, MFCS 2011 |
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国 | ポーランド |

市 | Warsaw |

期間 | 8/22/11 → 8/26/11 |

### フィンガープリント

### All Science Journal Classification (ASJC) codes

- Theoretical Computer Science
- Computer Science(all)

### これを引用

*Mathematical Foundations of Computer Science 2011 - 36th International Symposium, MFCS 2011, Proceedings*(pp. 376-387). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); 巻数 6907 LNCS). https://doi.org/10.1007/978-3-642-22993-0_35