Some upper bounds for the atom-bond connectivity index of graphs*
Some upper bounds for the atom-bond connectivity index of graphs*
复制标题
图的原子键连通性指数的一些上限*
DOI:
10.1016/j.aml.2012.03.021
复制
发表时间:
2012-07-01
影响因子:
3.7
通讯作者:
Guo, Xiaofeng
中科院分区:
文献类型:
--
作者:
Chen, Jinsong;Liu, Jianping;Guo, Xiaofeng
The recently introduced atom-bond connectivity (ABC) index provides a good model for the stability of linear and branched alkanes as well as the strain energy of cycloalkanes. Furtula et al. determined the extremal ABC values for chemical trees, and showed that the star tree S-n has the maximal ABC index among all trees. In this work, we show that among all n-vertex graphs with vertex connectivity k, the graph K-k boolean OR (K-1 boolean OR Kn- k-1) is the unique graph with maximum ABC index. Furthermore, we determine the maximum ABC index of a connected graph with n vertices and matching number beta and characterize the unique extremal graph as K (beta) root Kn-beta. (C) 2012 Elsevier Ltd. All rights reserved.