engleski

On Geometric-Arithmetic Indices of (Molecular) Trees, Unicyclic Graphs and Bicyclic Graphs

The geometric-arithmetic (GA) index is a newly proposed graph invariant in mathematical chemistry. We determine the n-vertex (molecular) trees with the second and the third for n >= 7, the fourth and the fifth for n >= 10, and the sixth for n >= 11 maximum GA indices, unicyclic (molecular) graphs with the first for n >= 3, the second and the third for n >= 5, the fourth for n >= 7, and the fifth and the sixth for n >= 9 maximum GA indices, and bicyclic (moleclar) graphs with the first for n >= 4, the second and the third for n >= 6, and the fourth, the fifth and the sixth for n >= 8 maximum GA indices.

unicyclic graphs ; bicyclic graphs

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