## Abstract

This paper studies the client-server version of the 2-spanner problem. This is a natural generalization of the sparse 2-spanner problem that turns out to be useful for certain network design problems. The paper presents a logarithmic ratio approximation algorithm for this problem. The algorithm and the analysis are extended to the directed client-server 2-spanner problem and to the client-server augmentation 2-spanner problem, establishing a

logarithmic approximation ratio for these problems too.

logarithmic approximation ratio for these problems too.

Original language | English |
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Title of host publication | SIROCCO 8, Proceedings of the 8th International Colloquium on Structural Information and Communication Complexity, Vall de Núria, Girona-Barcelona, Catalonia, Spain, 27-29 June, 2001 |

Editors | Francesc Comellas, Josep Fàbrega, Pierre Fraigniaud |

Publisher | Carleton Scientific |

Pages | 117-132 |

Number of pages | 16 |

Volume | 8 |

State | Published - 2001 |

### Publication series

Name | Proceedings in Informatics |
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Publisher | Carleton Scientific |