关于点赋权图的赋权控制数的一个上界 |
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引用本文: | 沈健,;孙玉芹. 关于点赋权图的赋权控制数的一个上界[J]. 新乡学院学报(自然科学版), 2008, 0(1): 1-2 |
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作者姓名: | 沈健, 孙玉芹 |
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作者单位: | [1]同济大学数学系,上海200092; [2]上海电力学院数理系,上海200090 |
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摘 要: | ![]() 点赋权图Gw=(V,E,W)是指对简单图G的顶点集作一个赋权函数W:V→R^+。在图G所有的控制集D V(G)(V(G)/D中的任意顶点v都与D中的点关联)中最小的权和W(D)称为图Gw的赋权控制数。记作γw(Gw)。证明了对基数为N,平均权为W^-的图Gw,其赋权控制数γw(Gw)≤Nw^-1δ+1^——1+1n(δ+1)。
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关 键 词: | 赋权图 控制数 赋权控制数 |
The Upper Bound of Weighted Domination Number of Weighted Graph |
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Affiliation: | SHEN Jian,SUN Yu-qin (1. Department of Mathematics, Tongji University,Shanghai 200092, Chinas;2. Department of Mathematics and Phycis of Shanghai University of Electric Power,Shanghai 200090,China) |
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Abstract: | ![]() A weighted graph Gw=(V,E,W) is a graph G together with a positive weight-funetion on its vertex set W:V→R^+. The weighted domination number γw (Gw) of Gw is the minimum weight W(D) of a set D V(G) such that every vertex v∈ V(D)/D has a neighbor in D. This paper shows that γw(Gw)≤Nw^δ+1——1+1n(δ+1)for a weighted graph Gw of order Nand average weight w^1. |
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Keywords: | weighted graph domination number weighted domination number |
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