摘要
Padmakar-Ivan(PI)指数是一个类似于Wiener指数的拓扑指数,它能够反应有机分子的某些结构特征。给出给定顶点数和叶子节点数的Halin图的PI指数,并刻画具有相应PI指数的Halin图类。
The Padmakar-Ivan(PI) indexis is a Wiener-Szeged-like topological index which reflects certain structural features of organic molecules.In this paper,we present the PI indices of the Halin graphs with given order and leaf number,and we characterize the Halin graphs with the corresponding PI indices.
出处
《丽水学院学报》
2011年第5期9-11,共3页
Journal of Lishui University