On the Randic and Sum-Connectivity Index of Nanotubes

Mohammad Reza Farahani

doi:10.2478/awutm-2013-0014

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On the Randic and Sum-Connectivity Index of Nanotubes

Annals of West University of Timisoara - Mathematics and Computer Science

Volume 51 (2013): Issue 2 (December 2013)

By: Mohammad Reza Farahani

Open Access

|Jan 2014

Abstract

Milan Randić proposed in 1975 a structural descriptor called the branching index that later became the well-known Randić connectivity index; it is defined on the ground of vertex degrees . In 2008, B. Zhou and N. Trinajstić proposed another connectivity index, named the Sumconnectivity index X(G).In this paper, we focus on the structure of ”G = V C₅C₇[p, q]” and ”H = HC₅C₇[p, q]” nanotubes and counting Randić index and sum-connectivity index of these nanotubes.

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