Extremal graphs maximizing the hyper-Zagreb index are characterized under fixed vertex/edge-connectivity, number of leaves, chromatic number, and independence number, with QSPR studies on chemical relevance.
Konstantinova, The discrimination ability of some topological and information distance indices for graphs of unbranched hexagonal systems,J
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Resolving Open Problems on the Hyper-Zagreb Index and its Chemical Applications
Extremal graphs maximizing the hyper-Zagreb index are characterized under fixed vertex/edge-connectivity, number of leaves, chromatic number, and independence number, with QSPR studies on chemical relevance.