The Laplacian polynomial and Kirchhoff index of graphs derived from regular graphs

The Laplacian polynomial and Kirchhoff index of graphs derived from regular graphs
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从正则图导出的图的拉普拉斯多项式和基尔霍夫指数

DOI:
10.1016/j.dam.2013.06.010
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发表时间:
2013-12
影响因子:
1.1
通讯作者:
Yanfeng Luo
Yanfeng Luo
中科院分区:
数学3区
文献类型:
--
作者:
Weizhong Wang;Dong Yang;Yanfeng Luo

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让R (G)获得的图G的添加一个新的顶点对应于每条边的G和加入每一个新的顶点到顶点相应的边缘,和Q从G (G)获得的图形中插入一个新顶点的G和每条边加入边那些对这些新顶点躺在邻边的G在这篇文章中,我们确定的拉普拉斯算子多项式R (G)和Q正则图G (G);另一方面,我们导出了这些图的基尔霍夫指数的公式和下界。
Let R (G) be the graph obtained from G by adding a new vertex corresponding to each edge of G and by joining each new vertex to the end vertices of the corresponding edge, and Q (G) be the graph obtained from G by inserting a new vertex into every edge of G and by joining by edges those pairs of these new vertices which lie on adjacent edges of G. In this paper, we determine the Laplacian polynomials of R (G) and Q (G) of a regular graph G; on the other hand, we derive formulae and lower bounds of the Kirchhoff index of these graphs.
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