Wiener Indices in Random Cyclooctane Chains  

作　　者：WEI Shouliu KE Xiaoling WANG Yan 

机构地区：[1]College of Mathematics and Data Science, MinjiangUniversity, Fuzhou 350121, Fujian, China [2]School of Mathematics and Statistics, Minnan Normal University, Zhangzhou 363000, Fujian, China

出　　处：《Wuhan University Journal of Natural Sciences》2018年第6期498-502,共5页武汉大学学报（自然科学英文版）

基　　金：Supported by the Natural Science Foundation of Fujian Province(2017J1404);Science Foundation of Minjiang University(MYK15004,Mjyp201608)

摘　　要：The Wiener index of a connected graph（molecule graph） G is the sum of the distances between all pairs of vertices of G. In this paper, simple exact formula are established for the expected value of Wiener index in random cyclooctane chain. Moreover, we obtain the average value of the Wiener indices with respect to the set of all cyclooctane chains with n octagons.The Wiener index of a connected graph（molecule graph） G is the sum of the distances between all pairs of vertices of G. In this paper, simple exact formula are established for the expected value of Wiener index in random cyclooctane chain. Moreover, we obtain the average value of the Wiener indices with respect to the set of all cyclooctane chains with n octagons.

关 键 词：Wiener index random cyclooctane chain expectedvalue average value 

分 类 号：O157.5[理学—数学]