摘要
给出了图的一种新ABC指数定义为ABC(G)=∑uv∈E(G)((Du+Dv-2/DuDv)~(1/2)),其中Du是图G中各顶点到顶点u的距离之和.证明了该指数与辛烷同分异构体的ABC指数、Acentric因子、熵之间存在好的线性相关性,确定了该指数的一些基本性质,刻画了具有这种指数最小值的树.
A novel atom-bond connectivity index for a(molecular) graph is defined as ABC(G)=∑uv∈E(G)((Du+Dv-2/DuDv)~(1/2)),where Du is the distance sum of vertex u in G.It is shown that there exists a good linear correlation between this atom-bond connectivity index ABC and Acentric factor,entropy of the octane isomers.Some basic properties for this index and the tree with the minimum value of this index are determined.
出处
《湖南师范大学自然科学学报》
CAS
北大核心
2012年第3期6-9,共4页
Journal of Natural Science of Hunan Normal University
基金
湖南省教育厅科研基金资助项目(11C0239)
关键词
拓扑指数
ABC指数
距离
极图
树
topological index; atom-bond connectivity index; distance; extremal graph; tree