The Atom Bond Connectivity and Geometric-Arithmetic GA Indices of Pent-Heptagonal Nanotube

摘要

The atom bond connectivity ABC index and geometric-arithmetic GA index are two topological indices were defined as ABC(G)= ∑_(∈E(G))((d_u+d_v-2)/(d_ud_v))/(1/2) and GA(G)=∑_(∈E(G))(2(d_ud_v)/(1/2))/(d_u+d_v), in which degree of a vertex v denoted by dv. In this paper we compute these topological indices for a type of Nanotubes that namly: "Pent-Heptagonal Nanotube VAC_5C_7(S)".