Applied Mathematics and Nonlinear Sciences
Journal license

Journal

Applied Mathematics and Nonlinear Sciences


Volume
& Issue

Volume 4, Issue 2


Published
on

December 18, 2019


Pages

455-468


DOI

Article

Computation of certain topological coindices of graphene sheet and C4C8(S) nanotubes and nanotorus

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Authors

Melaku Berhe Affiliation:
School of Mathematics and Statistics and Hubei key, Laboratory Mathematics Sciences Central China Normal University, Wuhan, 430079, P.R. China
and Chunxiang Wang Affiliation:
Faculty of Mathematics and Statistics, Central China Normal University, Wuhan 430079, P.R. China


Abstract

Topological indices are widely used for quantitative structure-activity relationship (QSAR) and quantitative structure-property relationship (QSPR). Topological coindices are topological indices that considers the non adjacent pairs of vertices. Here, we consider the following five well-known topological coindices: the first and second Zagreb coindices, the first and second multiplicative Zagreb coindices and the F-coindex. By using graph structural analysis and derivation, we study the above-mentioned topological coindices of some chemical molecular graphs that frequently appear in medical, chemical, and material engineering such as graphene sheet and C4C8(S) nanotubes and nanotorus and obtain the computation formulae of the coindices of these graphs. Furthermore, we analyze the results by MATLAB and obtain the relationship of the coindices which they describe the physcio-chemical properties and biological activities.


Keywords

Molecular graph, topological coindex, graphene sheet, nanotubes, nanotorus, 05C90, 90C35


Citation

Berhe, M. & Wang, C. (2019). Computation of certain topological coindices of graphene sheet and C4C8(S) nanotubes and nanotorus. Applied Mathematics and Nonlinear Sciences, 4(2), 455–468. https://doi.org/10.2478/AMNS.2019.2.00043

Published by: Engineering Journals

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