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(g,f,k)临界图的一个充分必要条件
引用本文:胡杏.(g,f,k)临界图的一个充分必要条件[J].邵阳学院学报(自然科学版),2008,5(1):12-14.
作者姓名:胡杏
作者单位:湖南科技大学,数学与计算科学学院,湖南,湘潭,411201
摘    要:设G是-个简单图,g和f是两个定义在V(G)上的整数值函数,且对所有的x∈V(G)都满足g(x)≤f(X).如果删除G的任何k个顶点后,图G的其余部分含有-个(g,f)因子,那么称图G为一个(g,f,k)-临界图.本文给出了-个图是(g,f,k)-临界图的-个充要条件,并对这些奈件的应用作了讨论。进-步,本文研究了(g,f,k)-临界图的性质.

关 键 词:(g  f)-因子  (g  f  k)-临界图  充分必要条件
文章编号:1672-7010(2008)01-0012-03
修稿时间:2007年12月12

A necessary and sufficient condition for a graph to bea (g, f, k)-critical graph
Hu Xing.A necessary and sufficient condition for a graph to bea (g, f, k)-critical graph[J].Journal of Shaoyang University:Science and Technology,2008,5(1):12-14.
Authors:Hu Xing
Institution:Hu Xing (Department of Mathematics Hunan University of Science and Technology, Hunan, 411201, P.R, China)
Abstract:Let G be a graph, and let g and f be integer-valued functions defined on V (G) such that g (x) ≤ f (x) for all x ∈ V(G). Then graph G is called a (g, f, k)-critical graph if after deleting any k vertices of G the remaining graph of G has a (g, f)-factor. In this paper a necessary and sufficient condition for a graph to be (g, f, k)-critical is given. Some applications of this condition are discussed. Therefore the properties of (g, f, k)-critical graph are studied.
Keywords:(g  f)-factor  (g  f  k)-critical graph  a necessary and  sufficient condition
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