ON LEAP ZAGREB INDICES OF SOME CYCLE RELATED GRAPHS

Let G = (V, E) represent a graph. The 2-degree of a vertex v in G is the number of vertices which are at distance two from v and denoted by d(2)(v). The leap Zagreb indices are the recently introduced distance-based topological indices defined using 2-degrees of vertices in G. In this paper, we compute the leap Zagreb indices of some cycle related graphs, namely book graph, cycle with parallel chords, cycle with parallel P-k chords, shell graph and shell type graphs.