Approximation Algorithms for the Maximum Weight Internal Spanning Tree Problem
Approximation Algorithms for the Maximum Weight Internal Spanning Tree Problem
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最大权内部生成树问题的近似算法
DOI:
10.1007/s00453-018-00533-w
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发表时间:
2016-08
期刊:
影响因子:
1.1
通讯作者:
Wang Dan
中科院分区:
文献类型:
--
作者:
Chen Zhi-Zhong;Lin Guohui;Wang Lusheng;Chen Yong;Wang Dan
Given a vertex-weighted connected graph, the maximum weight internal spanning tree (MwIST for short) problem asks for a spanning treeTofGsuch that the total weight of internal vertices inTis maximized. The unweighted variant, denoted as MIST, is NP-hard and APX-hard, and the currently best approximation algorithm has a proven performance ratio of 13 / 17. The currently best approximation algorithm for MwIST only has a performance ratio of, for any. In this paper, we present a simple algorithm based on a novel relationship between MwIST and maximum weight matching, and show that it achieves a significantly better approximation ratio of 1/2. When restricted to claw-free graphs, a special case previously studied, we design a 7/12-approximation algorithm.
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DOI:
10.1007/978-3-319-21840-3_41
发表时间:
2014-12
期刊:
ArXiv
影响因子:
--
作者:
Wenjun Li;Jian-xin Wang;Jianer Chen;Yixin Cao
通讯作者:
Wenjun Li;Jian-xin Wang;Jianer Chen;Yixin Cao
影响因子:
1
作者:
Zhi-Zhong Chen;Youta Harada;Fei Guo;Lusheng Wang
通讯作者:
Lusheng Wang
DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
Gábor Salamon
通讯作者:
Gábor Salamon
DOI:
10.1007/978-3-319-13075-0_37
发表时间:
2014-12
期刊:
--
影响因子:
--
作者:
Xingfu Li;Daming Zhu
通讯作者:
Xingfu Li;Daming Zhu
影响因子:
1.1
作者:
Martin Knauer;J. Spoerhase
通讯作者:
Martin Knauer;J. Spoerhase