Some Topological Indices of Graphs and some Inequalities

Document Type : Research Paper


1 Persian Gulf University, Bushehr, Iran

2 Payame Noor University, Shiraz, Iran


Let G be a graph. In this paper, we study the eccentric connectivity index, the new version of the second Zagreb index and the forth geometric–arithmetic index.. The basic properties of these novel graph descriptors and some inequalities for them are established.