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Iranian journal of mathemathical chemistry./Iranian journal of mathemathical chemistry· 2013Q2

THE HYPER-ZAGREB INDEX OF GRAPH OPERATIONS

Gholam Hassan Shirdel, Hassan Rezapour, A. M. Sayadi

Short summary

A new graph invariant, the Hyper-Zagreb index, is defined as the sum of the squares of the sums of degrees of adjacent vertices, and its values are computed for Cartesian products, compositions, joins, and disjunctions of graphs.

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Field: Geometry and Topology

Geometry and TopologyMathematics