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arXiv 2103.13663math.CO
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聚合物的Sombor指数

Sombor Index of Polymers

Saeid Alikhani, Nima Ghanbari

摘要:

设$G=(V,E)$是有限简单图. $G$的Sombor指数$SO(G)$定义为$\sum_{uv\in E(G)}\sqrt{d_u^2+d_v^2}$,其中$d_u$是顶点$u$在$G$中的度数。设$G$是一个连通图,它是由两两不相交的连通图$G_1,\ldots ,G_k$通过选择$G_1$的一个顶点、$G_2$的一个顶点并标识这两个顶点而构造的。然后继续以这种方式归纳。我们说$G$是一个聚合物图,由单体单元$G_1,...,G_k$通过点连接得到。在本文中,我们考虑这些图的一些特殊情况下,在化学中的重要性,并研究其Sombor指数。

英文摘要:

Let $G=(V,E)$ be a finite simple graph. The Sombor index $SO(G)$ of $G$ is defined as $\sum_{uv\in E(G)}\sqrt{d_u^2+d_v^2}$, where $d_u$ is the degree of vertex $u$ in $G$. Let $G$ be a connected graph constructed from pairwise disjoint connected graphs $G_1,\ldots ,G_k$ by selecting a vertex of $G_1$, a vertex of $G_2$, and identifying these two vertices. Then continue in this manner inductively. We say that $G$ is a polymer graph, obtained by point-attaching from monomer units $G_1,...,G_k$. In this paper, we consider some particular cases of these graphs that are of importance in chemistry and study their Sombor index.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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