<abstract xmlns="http://www.w3.org/1999/xhtml"> 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 <inline-formula><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../graphic/fig1(p39).png"></inline-graphic></inline-formula>. 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 <inline-formula><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../graphic/fig2(p39).png"></inline-graphic></inline-formula> and sum-connectivity index <inline-formula><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="../graphic/fig3(p39).png"></inline-graphic></inline-formula>of these nanotubes. </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.

On the Randic and Sum-Connectivity Index of Nanotubes

Department of Applied Mathematics, Iran University of Science and Technology (IUST), Narmak, Tehran 16844, Iran

Annals of West University of Timisoara - Mathematics and Computer Science

{"article-title":"On the Randic and Sum-Connectivity Index of Nanotubes"}

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...

On the Randic and Sum-Connectivity Index of Nanotubes

Published Online: Jan 22, 2014

Page range: 39 - 46

DOI: https://doi.org/10.2478/awutm-2013-0014

This content is open access.