arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2109.02142math.COcs.DM
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强弦图的完全控制的线性时间算法

A linear-time algorithm for semitotal domination in strongly chordal graphs

Vikash Tripathi, Arti Pandey, Anil Maheshwari

摘要:

在没有孤立点的图$G=(V,E)$中,如果对每个顶点$u \in D$都存在另一个顶点$v \in D$,使得$G$中$u$和$v$之间的距离至多为2,则称控制集$D \subseteq V$为完全控制集。给定一个无孤立点的图$G=(V,E)$,最小半控制问题就是寻找图$G$的最小基数半控制集.总体控制数,记作$γ_{t2}(G)$,是$G$的总体控制集的最小基数。该问题的决策版本仍然是NP完全的,即使限制在弦图,弦二部图,和可平面图。Galby等人在[6]中证明了对于包含许多已知图类的有界MIM-width图,该问题可以在多项式时间内解决,但对于强弦图,该问题的复杂性没有得到解决。Henning和Pandey在[20]中也要求解决强弦图中问题的复杂性状态。在本文中,我们解决了这个问题的复杂性强弦图设计的线性时间算法的问题。

英文摘要:

In a graph $G=(V,E)$ with no isolated vertex, a dominating set $D \subseteq V$, is called a semitotal dominating set if for every vertex $u \in D$ there is another vertex $v \in D$, such that distance between $u$ and $v$ is at most two in $G$. Given a graph $G=(V,E)$ without isolated vertices, the Minimum Semitotal Domination problem is to find a minimum cardinality semitotal dominating set of $G$. The semitotal domination number, denoted by $γ_{t2}(G)$, is the minimum cardinality of a semitotal dominating set of $G$. The decision version of the problem remains NP-complete even when restricted to chordal graphs, chordal bipartite graphs, and planar graphs. Galby et al. in [6] proved that the problem can be solved in polynomial time for bounded MIM-width graphs which includes many well known graph classes, but left the complexity of the problem in strongly chordal graphs unresolved. Henning and Pandey in [20] also asked to resolve the complexity status of the problem in strongly chordal graphs. In this paper, we resolve the complexity of the problem in strongly chordal graphs by designing a linear-time algorithm for the problem.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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