engleski

On geometric-arithmetic index

The geometric-arithmetic (GA) index is a newly proposed graph invariant in mathematical chemistry. We give the lower and upper bounds for GA index of molecular graphs using the numbers of vertices and edges. We also determine the n-vertex molecular trees with the minimum, the second and the third minimum, as well as the second and the third maximum GA indices.

Geometric-arithmetic index ; Molecular graphs ; Molecular trees ; Degree (of vertex)

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