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arXiv 1207.0953cs.DM
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图和超图的有效控制集和边控制集

Efficient Dominating and Edge Dominating Sets for Graphs and Hypergraphs

Andreas Brandstädt, Arne Leitert, Dieter Rautenbach

摘要:

设G=(V,E)是一个图.一个顶点支配它自己和它的所有邻居,即,V中的每个顶点v支配它的闭邻域N[v]。G中的一个顶点集D是一个有效控制(e. d.)如果对于V中的每个顶点v,D中恰好有一个d控制v,则边集M是有效边控制(e.e.d.)如果它是图G的线图L(G)中的有效支配集,则称它是G的配集. ED问题(EED问题,分别)要求存在一个e.d.设置(e.e.d.)在给定的图形中分别设置)。我们给出了一个统一的框架,调查这些问题的复杂性,各类图。特别是,我们解决了一些公开的问题,并给出了线性时间算法的ED和EED的对偶弦图。我们将这两个问题推广到超图,证明了ED在α-无圈超图上是NP-完全的,在超树上是多项式时间可解的,而EED在α-无圈超图上是多项式的,在超树上是NP-完全的.

英文摘要:

Let G=(V,E) be a graph. A vertex dominates itself and all its neighbors, i.e., every vertex v in V dominates its closed neighborhood N[v]. A vertex set D in G is an efficient dominating (e.d.) set for G if for every vertex v in V, there is exactly one d in D dominating v. An edge set M is an efficient edge dominating (e.e.d.) set for G if it is an efficient dominating set in the line graph L(G) of G. The ED problem (EED problem, respectively) asks for the existence of an e.d. set (e.e.d. set, respectively) in the given graph. We give a unified framework for investigating the complexity of these problems on various classes of graphs. In particular, we solve some open problems and give linear time algorithms for ED and EED on dually chordal graphs. We extend the two problems to hypergraphs and show that ED remains NP-complete on alpha-acyclic hypergraphs, and is solvable in polynomial time on hypertrees, while EED is polynomial on alpha-acyclic hypergraphs and NP-complete on hypertrees.

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