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http://hdl.handle.net/10119/9861
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Title: | Hardness Results and an Exact Exponential Algorithm for the Spanning Tree Congestion Problem |
Authors: | Okamoto, Yoshio Otachi, Yota Uehara, Ryuhei Uno, Takeaki |
Keywords: | Spanning tree congestion chain graph split graph cograph computational complexity |
Issue Date: | 2011-04-27 |
Publisher: | Springer |
Magazine name: | Lecture Notes in Computer Science |
Volume: | 6648/2011 |
Start page: | 452 |
End page: | 462 |
DOI: | 10.1007/978-3-642-20877-5_44 |
Abstract: | Spanning tree congestion is a relatively new graph parameter, whichhas been studied intensively. This paper studies the complexity of the problemto determine the spanning tree congestion for non-sparse graph classes, while itwas investigated for some sparse graph classes before. We prove that the problemis NP-hard even for chain graphs and split graphs. To cope with the hardnessof the problem, we present a fast (exponential-time) exact algorithm that runs inO ^∗(2^n) time, where n denotes the number of vertices. Additionally, we providea constant-factor approximation algorithm for cographs, and a linear-time algorithmfor chordal cographs. |
Rights: | This is the author-created version of Springer, Yoshio Okamoto, Yota Otachi, Ryuhei Uehara and Takeaki Uno, Lecture Notes in Computer Science, 6648/2011, 2011, 452-462. The original publication is available at www.springerlink.com, http://dx.doi.org/10.1007/978-3-642-20877-5_44 |
URI: | http://hdl.handle.net/10119/9861 |
Material Type: | author |
Appears in Collections: | b10-1. 雑誌掲載論文 (Journal Articles)
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