数学研究
數學研究
수학연구
JOURNAL OF MATHEMATICAL STUDY
2010年
4期
322-327
,共6页
离心率%离心连通度指标
離心率%離心連通度指標
리심솔%리심련통도지표
Eccentric connectivity index%Eccentricity
设G=(V, E)是连通图.G的离心连通度指标定义为ξc(G)=∑x∈V ec(x)deg(x),其中ec(x)是x的离心率,deg(x)是x的度.我们得到了直径为d的单圈图的上下界.
設G=(V, E)是連通圖.G的離心連通度指標定義為ξc(G)=∑x∈V ec(x)deg(x),其中ec(x)是x的離心率,deg(x)是x的度.我們得到瞭直徑為d的單圈圖的上下界.
설G=(V, E)시련통도.G적리심련통도지표정의위ξc(G)=∑x∈V ec(x)deg(x),기중ec(x)시x적리심솔,deg(x)시x적도.아문득도료직경위d적단권도적상하계.
Let G = (V, E) be a connected graph. The eccentric connectivity index of G is defined as ξc(G) = ∑x∈V ec(x)deg(x) , where ec(x) is the eccentricity of X, deg(x) is the degree of x. We obtain the lower and upper bounds of unicyclic graphs with diameter, d.
