This method calculates the augmented Zagreb index.
a graph as a graphNEL object.
the degree of each node of g. Will be automatically calculated if not supplied.
This method returns the augmented Zagreb index of a graph as a double-precision floating point value.
Lavanya Sivakumar, Michael Schutte
B. Furtula and A. Graovac and D. Vukicevic: Augmented Zagreb Index. Journal of Mathematical Chemistry, 48:370-380, 2010.
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