On the topological indices on double graphs

Document Type : Research Articles

Authors

1 Dept. of Math., Semnan University

2 Dep. of Math, Semnan University

10.22080/cjms.2023.25624.1660

Abstract

In this paper, first we study the elementary properties of double graphs and then we present explicit formulas for a few topological indices on double graphs, i.e., of graphs which are the direct product of a simple graph $G$ with the graph obtained by the complete graph $K_{2}$ adding a loop to each vertex. Finally, we compute the eccentric connectivity index of the double of lexicographic product and complete sum of two graphs.

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Main Subjects