Approximation Algorithms for Maximally Balanced Connected Graph Partition
Approximation Algorithms for Maximally Balanced Connected Graph Partition
复制标题
最大平衡连通图划分的近似算法
DOI:
10.1007/s00453-021-00870-3
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发表时间:
2019-10
期刊:
影响因子:
1.1
通讯作者:
Zhang An
中科院分区:
文献类型:
--
作者:
Chen Yong;Chen Zhi-Zhong;Lin Guohui;Xu Yao;Zhang An
Given a connected graph, we seek to partition the vertex setVintoknon-empty parts such that the subgraph induced by each part is connected, and the partition is maximally balanced in the way that the maximum cardinality of thesekparts is minimized. We refer this problem to asmin-max balanced connected graph partitionintokparts and denote it ask-BGP. The vertex-weighted version of this problem on trees has been studied since about four decades ago, which admits a linear time exact algorithm. The vertex-weighted 2-BGPand 3-BGPadmit a 5/4-approximation and a 3/2-approximation, respectively. When, no approximability result exists fork-BGP, i.e., the vertex unweighted variant, except a trivialk-approximation. In this paper, we present another 3/2-approximation for the 3-BGPand then extend it to become ak/2-approximation fork-BGP, for any fixed. Furthermore, for 4-BGP, we propose an improved 24/13-approximation. To these purposes, we have designed several local improvement operations, which could find more applications in related graph partition problems.
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DOI:
10.1142/s0218195903001190
发表时间:
2002-04
期刊:
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影响因子:
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通讯作者:
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