具有较大Randi指数的4圈图  

The Tetracyclic Graphs with Large Maximum Randi Indices

作　　者：闫美芝 高玉斌[1] YAN Meizhi;GAO Yubin(School of Science,North University of China,Taiyuan Shanxi 030051,China)

机构地区：[1]中北大学理学院,山西太原030051

出　　处：《江西师范大学学报（自然科学版）》2018年第4期357-360,共4页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：山西省自然科学基金(201601D202003)资助项目.

摘　　要：研究了4圈图的Randi指数,得到4圈图中取得较大Randi指数的图的必要结构特征,并以1个特殊4圈图的指数值为界,证明大多数4圈图的Randi指数均小于这一临界值,进而给出前9大Randi指数和相应的极图,扩充了已有结果.The Randicindices of the tetracyclic graphs is studied,and the necessary structural features of the larger Randic indices are obtained.It has proved that the Randic indices of most tetracyclic graphs are less than that of a special tetracyclic graph of boundary value,and then show the first nine Randic indices and the corresponding pole diagram,which is the expansion of the existing results.

关 键 词：RANDIC指数 4圈图 边结构 

分 类 号：O157.5[理学—数学]