Hyper Zagreb Index of Bridge and Chain Grpahs

Hyper Zagreb Index of Bridge and Chain Grpahs
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DOI:
10.30538/oms2018.0013
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发表时间:
2017-03
期刊:
ArXiv
影响因子:
--
通讯作者:
Nilanjan De
Nilanjan De
中科院分区:
其他
文献类型:
--
作者:
Nilanjan De

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设 G 是一个简单的连通分子图,其顶点集 $V(G)$ 和边集 $E(G)$。经典萨格勒布指数的一个重要修改,称为超萨格勒布指数 $HM(G)$ 定义为相邻顶点度数总和的平方和,即 $G$ 的所有边上的项 $[{d_G}(u)+{d_G}(v)]^2$ 之和,其中 ${d_G}(u)$ 表示 $G$ 的顶点 $u$ 的度数。在本文中,计算了某些桥图和链图的超萨格勒布指数,因此使用导出的结果,我们计算了几类化学图和纳米结构的超萨格勒布指数。
Let G be a simple connected molecular graph with vertex set $V(G)$ and edge set $E(G)$. One important modification of classical Zagreb index, called hyper Zagreb index $HM(G)$ is defined as the sum of squares of the degree sum of the adjacent vertices, that is, sum of the terms $[{d_G}(u)+{d_G}(v)]^2$ over all the edges of $G$, where ${d_G}(u)$ denote the degree of the vertex $u$ of $G$. In this paper, the hyper Zagreb index of certain bridge and chain graphs are computed and hence using the derived results we compute the hyper Zagreb index of several classes of chemical graphs and nanostructures.