摘要
对简单图G=〈V,E〉,如果存在一个映射f:V→{0,1,2,…,2 E-1}满足1)对任意的u,v∈V,若u≠v,则f(u)≠f(v);2)对任意的e1,e2∈E,若e1≠e2,则g(e1)≠g(e2),此处g(e)=f(u)+f(v),e=uv;3){g(e)e∈E}={1,3,5,…,2 E-1},则称G为奇强协调图,f称为G的奇强协调标号.给出了直径为4的树的奇强协调标号.
Let G = (V,E) be a simple graph. If there exist a mapping f:V→{0,1,2,…,2 E-1}Satisfied 1) u,v∈V,if u≠v,then f(u)≠f(v);2)e1,e2∈E,if e1≠e2,then g(e1)≠g(e2),here g(e)=f(u)+f(v),e=uv;3){g(e)e∈E}={1,3,5,…,2 E-1}, then G is called odd strong harmonious graph and f is called odd strong harmonious labeling of G. In this paper ,We give odd strong harmonious labeling of trees whose diameters are four.
出处
《数学的实践与认识》
CSCD
北大核心
2007年第12期133-136,共4页
Mathematics in Practice and Theory
基金
河南省自然科学基金项目(0511013800)
关键词
直径
树
奇强协调图
奇强协调标号
diameters
tree
odd strong harmonious graph
odd strong harmonious labeling