Graph energies draw the greater attention of the scientific community due to their direct applicability in molecular chemistry. In this paper, we establish the energy of a graph obtained by the means of some graph operations. The energy of the product of graph K_{n} \times G, where K_{n} is a complete graph and G is a simple undirected graph and energy of the corresponding digraph are estimated. Further, the duplication graph DG is considered and proved that the energy \mathcal{E} (DG) = 2\mathcal{E} (G) and \mathcal{E} (DG^{\sigma}) = 2\mathcal{E} (G^{\sigma}).

Additional Information


 Lokesha, V., Shanthakumari. Y. , Yasmeen, K. Zeba