A New Method for Computation of The Wiener Index of C4C8(S) Nanotorus

in which V (G) is the set of all vertices of G and d(i, j) is the distance between vertices i and j of the graph. Ashrafi and yousefi (see A. R. Ashrafi and S. Yousefi, Computing the Wiener Index of a TUC4C8(S) Nanotorus, MATCH Commun. Math. Comput. Chem., 57(2)(2007), 403-410) computed the Wiener index of the TUC4C8(S) Nanotorus. In this paper we use a new method to compute the Wiener index of these Nanotorus