Sigma index and forgotten index of the subdivision and r-subdivision graphs
Proceedings of the Jangjeon Mathematical Society, vol.21, no.3, pp.375-383, 2018 (Scopus)
- Publication Type: Article / Article
- Volume: 21 Issue: 3
- Publication Date: 2018
- Doi Number: 10.17777/pjms2018.21.3.375
- Journal Name: Proceedings of the Jangjeon Mathematical Society
- Journal Indexes: Scopus
- Page Numbers: pp.375-383
- Keywords: Forgotten index, R-subdivision graph, Sigma index, Subdivision graph
- Bursa Uludag University Affiliated: Yes
Abstract
© 2018 Jangjeon Research Institute for Mathematical Sciences and Physics. All rights reserved.Topological graph indices are defined and used by mathematicians and chemists to obtain some chemical properties of a molecule under consideration by calculating the related topological index obtained from the graph modelling the molecule. This saves one from a lot of laboratory work and its labor and cost. In this paper, we concentrate on two of these topological graph indices, namely the sigma index and the forgotten index of a graph. We calculate these two indices for the subdivision and r-subdivision graphs and give examples for some well-known graph classes.