On signed cycle domination in graphs
On signed cycle domination in graphs
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关于图中的符号循环支配
DOI:
10.1016/j.disc.2008.01.007
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发表时间:
2009-03
期刊:
影响因子:
--
通讯作者:
徐保根
中科院分区:
文献类型:
--
作者:
徐保根
Let G=(V,E) be a graph, a function f:E→{−1,1} is said to be an signed cycle dominating function (SCDF) of G if ∑e∈E(C)f(e)≥1 holds for any induced cycle C of G. The signed cycle domination number of G is defined as γsc′(G)=min{∑e∈E(G)f(e)∣f is an SCDF of G}. In this paper, we obtain bounds on γsc′(G), characterize all connected graphs G with γsc′(G)=|E(G)|−2, and determine the exact value of γsc′(G) for some special classes of graphs G. In addition, we pose some open problems and conjectures.
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