On the Hyper Zagreb index of certain generalized thorn graphs

Chidambaram Natarajan, Selvaraj Balachandran, SK Ayyaswamy

Let $G=(V,E)$ be a graph with $n$ vertices and $m$ edges. The hyper Zagreb index of $G$, denoted by $HM(G)$, is defined as $HM(G) =\sum\limits_{uv \in E(G)}\left[d_{G}(u)+d_G(v)\ri…