Zagreb Indices: Extension to Weighted Graphs Representing Molecules Containing Heteroatoms*
Dušanka Janežič, Ante Miličević, Sonja Nikolić, Nenad Trinajstić, Damir Vukičević · Institutional Repository of the Ruđer Bošković Institute (Ruđer Bošković Institute) · 2007
A possible extension of Zagreb indices to weighted graphs representing heterosystems is presented. It is based on the novel definition of the Zagreb indices by way of the here introduced Zagreb matrices. A theorem is given that is valid for the first Zagreb index of strongly weighted graphs.