Complexity and algorithms for the connected vertex cover problem in 4-regular graphs

Complexity and algorithms for the connected vertex cover problem in 4-regular graphs
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4-正则图中连通顶点覆盖问题的复杂度和算法

DOI:
10.1016/j.amc.2016.12.004
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发表时间:
2017
期刊:
Appl. Math. Comput.
影响因子:
--
通讯作者:
Wei Wang
Wei Wang
中科院分区:
--
文献类型:
--
作者:
Yuchao Li;Zishen Yang;Wei Wang

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在连通顶点覆盖(CVC)问题中,我们给定一个连通图 G,并要求找到一个具有最小基数的顶点覆盖集 C,使得导出子图 G [C] 是连通的。在本文中,我们将注意力集中在 4-正则图中的 CVC 问题。我们证明了 CVC 问题对于 4-正则图仍然是 NP 困难的,并给出了该问题的下界。此外,我们针对CVC问题提出了两种近似算法,近似率分别为3 2 和4 3+ O (1 n)。
In the connected vertex cover (CVC) problem, we are given a connected graph G and required to find a vertex cover set C with minimum cardinality such that the induced subgraph G [C] is connected. In this paper, we restrict our attention to the CVC problem in 4-regular graphs. We proved that the CVC problem is still NP-hard for 4-regular graphs and gave a lower bound for the problem. Moreover, we proposed two approximation algorithms for CVC problem with approximation ratio 3 2 and 4 3+ O (1 n), respectively.
连通顶点覆盖和树覆盖的 2 近似 NC 算法
DOI: --
发表时间: 2004
期刊: Information Processing Letters 90
影响因子: --
作者:
Fujito;T.;Doi;T.
通讯作者: T.