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:
Discret. Math.
影响因子:
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通讯作者:
E. Cockayne;Paul A. Dreyer;S. M. Hedetniemi;S. Hedetniemi
E. Cockayne;Paul A. Dreyer;S. M. Hedetniemi;S. Hedetniemi
中科院分区:
其他
文献类型:
--
作者:
E. Cockayne;Paul A. Dreyer;S. M. Hedetniemi;S. Hedetniemi

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图G=(V,E)上的罗马控制函数是满足以下条件的函数f:V→{0,1,2}:每个f(u)=0的顶点u与至少一个f(v)=2的顶点v相邻。罗马控制函数的权是值f(V)=∑u∈Vf(u)。图G上罗马控制函数的最小权称为图G的罗马控制数。在本文中,我们研究了图的控制数的这种变体的图论性质。
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.