PI Indices for Some Classes of Bicyclic Graphs

Jianxiu Hao1
1Institute of Mathematics, Physics and Information Sciences, Zhejiang Normal University, P.O. Box: 321004, Jinhua, Zhejiang, PR. China;

Abstract

The Padmakar-Ivan (PI) index is a Wiener-Szeged-like topological index which reflects certain structural features of organic molecules. In this paper, we study the PI indices of bicyclic graphs whose cycles do not share two or more common vertices.