Trees with Extreme Values of Second Zagreb Index and Coindex

Document Type: Original Scientific Paper


1 Faculty of Mathematical Sciences, University of Tabriz, Tabriz, I. R. Iran

2 Department of Mathematics, Azarbaijan Shahid Madani University, Tabriz, I. R. Iran



In this paper we present a generalization of the aforementioned bound for all trees in terms of the order and maximum degree. We also give a lower bound on the second Zagreb coindex of trees.


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