Roman domination in graphs
Roman domination in graphs
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DOI:
10.1016/j.disc.2003.06.004
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发表时间:
2004-03
期刊:
影响因子:
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通讯作者:
E. Cockayne;Paul A. Dreyer;S. M. Hedetniemi;S. Hedetniemi
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文献类型:
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作者:
E. Cockayne;Paul A. Dreyer;S. M. Hedetniemi;S. Hedetniemi
A Roman dominating function on a graph G=(V,E) is a function f : V→{0,1,2} satisfying the condition that every vertex u for which f(u)=0 is adjacent to at least one vertex v for which f(v)=2. The weight of a Roman dominating function is the value f(V)=∑u∈Vf(u). The minimum weight of a Roman dominating function on a graph G is called the Roman domination number of G. In this paper, we study the graph theoretic properties of this variant of the domination number of a graph.