On the topological indices on double graphs

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_{۲} 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.

کلیدواژه ها:

Topological index ، direct product ، Lexicographic product ، Complete sum ، Fibonacci cubes