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作 者:刘群[1,2]
机构地区:[1]兰州大学数学与统计学院,兰州甘肃730000 [2]河西学院数学与统计学院,张掖甘肃734000
出 处:《数学进展》2016年第2期176-184,共9页Advances in Mathematics(China)
基 金:supported by NSFC(No.11461020);the Youth Foundation of Hexi University in Gansu Province(No.QN2013-07);the Teaching Reform Project of Hexi University(No.HXXXJY-2014-011)
摘 要:图G的剖分图s(G)是在图G的每条边上加一个顶点.这些新添加的点的集合称为I(G).在三个图G1,G2和G3的基础上引进了一种新的图运算,称为剖分点一边冠图,记作Gs/1o(Gv/2 ∪GE/3),它由s(G1),[y(G1[个G2的拷贝和[I(G1]个G3的拷贝组成,将y(G1)中的第i个顶点和第i个G2的拷贝中的每个顶点连接,同时将I(G1)中的第i个顶点和第i个G3的拷贝中的每个顶点连接.本文给出了剖分点一边冠图的电阻距离和Kirchhoff指标.The subdivision graph S(G) of a graph G is the graph obtained by inserting a new vertex into every edge of G. The set of such new vertices is denoted by I(G). The subdivision vertex-edge corona of G1 with G2 and G3, denoted by G1s o (Gy ∪ GE3), is the graph consisting of S(G1), [V(G1)]copies of G2 and [I(G1)] copies of G3 by joining the i-th vertex in V(G1) to each vertex in the i-th copy of G2 and the i-th vertex of I(G1) to each vertex in the i-th copy of G3. In this paper, formulae for resistance distance and Kirchhoff index of G1s o (Gv/2 ∪ GE/3) are obtained.
关 键 词:KIRCHHOFF指标 电阻距离 剖分点一边冠图
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