Author/Authors :
N. Onagh, B. Department of Mathematics - Golestan University, Gorgan, Iran
Abstract :
The harmonic index of a graph G is defined as the sum of the weights 2degG(u)+degG(v) of all edges uv of G, where degG(u) denotes the degree of a vertex u in G. In this paper, we investigate the harmonic index of Cartesian, lexicographic, tensor, strong, corona and edge corona product of two connected graphs.
