Algorithmic aspects of the k-domination problem in graphs

被引:18
|
作者
Lan, James K. [1 ]
Chang, Gerard Jennhwa [1 ,2 ,3 ]
机构
[1] Natl Taiwan Univ, Dept Math, Taipei 10617, Taiwan
[2] Natl Taiwan Univ, Taida Inst Math Sci, Taipei 10617, Taiwan
[3] Natl Ctr Theoret Sci, Taipei Off, Taipei, Taiwan
关键词
k-domination; Tree; Block graph; Cactus; Block-cactus graph; Split graph; Algorithm; NP-complete; NUMBER;
D O I
10.1016/j.dam.2013.01.015
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
For a positive integer k, a k-dominating set of a graph G is a subset D subset of V (G) such that every vertex not in D is adjacent to at least k vertices in D. The k-domination problem is to determine a minimum k-dominating set of G. This paper studies the k-domination problem in graphs from an algorithmic point of view. In particular, we present a linear-time algorithm for the k-domination problem for graphs in which each block is a clique, a cycle or a complete bipartite graph. This class of graphs includes trees, block graphs, cacti and block-cactus graphs. We also establish NP-completeness of the k-domination problem in split graphs. (C) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码:1513 / 1520
页数:8
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