Calculates the sigma and forgotten indices in subdivision graphs, highlighting their implications for chemical properties.
© 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.
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Cangül et al. (2018) studied this question.
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