The first geometric-arithmetic index was introduced in the chemical theory as the summation of 2 du dv /(du dv ) overall edges of the graph, where du stand for the degree of the vertex u. In this paper we give the expressions for computing the first geometric-arithmetic index of hexagonal systems and phenylenes and present new method for describing hexagonal system by corresponding a simple graph to each hexagonal system.
YARAHMADI, Z. (2011). A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes. Iranian Journal of Mathematical Chemistry, 2(2), 101-108. doi: 10.22052/ijmc.2011.5217
MLA
Z. YARAHMADI. "A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes", Iranian Journal of Mathematical Chemistry, 2, 2, 2011, 101-108. doi: 10.22052/ijmc.2011.5217
HARVARD
YARAHMADI, Z. (2011). 'A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes', Iranian Journal of Mathematical Chemistry, 2(2), pp. 101-108. doi: 10.22052/ijmc.2011.5217
VANCOUVER
YARAHMADI, Z. A Note on the First Geometric-Arithmetic Index of Hexagonal Systems and Phenylenes. Iranian Journal of Mathematical Chemistry, 2011; 2(2): 101-108. doi: 10.22052/ijmc.2011.5217
)