摘要
根据图的基于顶点度的拓扑指数的定义以及树状六角系统的结构特征,给出了树状六角系统基于顶点度的一些拓扑指数I(C_h)和该六角系统的转向六角形个数以及分枝六角形个数的函数关系式,并得到了相应的极图.
Based on the definition of the vertex-degree-based topological indices of a graph and the structure of the catacondensed hexagonal systems,we are concerned with the relationship between some vertex-degree-based topological indices of catacondensed hexagonal systems I(Ch)and the number of turned hexagons and branched hexagons.We give a recursion formula to calculate I(Ch)and characterize the corresponding extreme graphs.
作者
刘剑萍
郑瑞玲
陈锦松
LIU Jianping;ZHENG Ruiling;CHEN Jinsong(College of Mathematics and Computer Science,Fuzhou University,Fuzhou,Fujian 350116,China)
出处
《福州大学学报(自然科学版)》
CAS
北大核心
2018年第2期151-155,共5页
Journal of Fuzhou University(Natural Science Edition)
基金
国家自然科学基金资助项目(11471077
11771362)
2016年福建省高校新世纪优秀人才支持计划资助项目
关键词
基于顶点度的拓扑指数
树状六角系统
转向六角形
分枝六角形
vertex-degree-based topological indices
catacondensed hexagonal systems
turned hexagon
branched hexagon