Eccentric Connectivity Index of HAC5C7[p,q] and HAC5C6C7[p,q] Nanotubes
نویسندگان
چکیده
For a simple connected graph G, Eccentric connectivity index denoted by ( ) c G 7 is defined as: ( ) ( ) ( ( ) ( )) c i V G G E i d i 7 , where E(i) is the eccentricity of vertex i, d(i) is the degree of vertex i and V(G) is the set of vertices of G. Eccentricity of vertex i in a graph G is the path length from verte i to vertex j that is farthest from i. In this paper, an algorithm is presented for computing the Eccentric connectivity index of any simple connected graph. Furthermore the Eccentric connectivity index is computed for HAC5C7[p,q] and HAC5C6C7[p,q] Nanotubes by GAP program.
منابع مشابه
COMPUTING WIENER INDEX OF HAC5C7[p, q] NANOTUBES BY GAP PROGRAM
The Wiener index of a graph Gis defined as W(G) =1/2[Sum(d(i,j)] over all pair of elements of V(G), where V (G) is the set of vertices of G and d(i, j) is the distance between vertices i and j. In this paper, we give an algorithm by GAP program that can be compute the Wiener index for any graph also we compute the Wiener index of HAC5C7[p, q] and HAC5C6C7[p, q] nanotubes by this program.
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