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Minimum Szeged index among unicyclic graphs with perfect matchings

机译:具有完美匹配的单结构图中的最小级索格指数

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摘要

Let G be a connected graph. The Szeged index of G is defined as Sz(G)=Sigma e=uvE(G)nu(e|G)nv(e|G), where nu(e|G) (resp., nv(e|G)) is the number of vertices whose distance to vertex u (resp., v) is smaller than the distance to vertex v (resp., u), and n0(e|G) is the number of vertices equidistant from both ends of e. Let M(2) be the set of unicyclic graphs with order 2 and a perfect matching. In this paper, we determine the minimum value of Szeged index and characterize the extremal graph with the minimum Szeged index among all unicyclic graphs with perfect matchings.
机译:设g是连接的图表。 综合指数的g被定义为Sz(g)=σe= uve(g)nu(e | g)nv(e | g),其中nu(e | g)(resp。,nv(e | g) )是与顶点U(RESP。,V)的距离小于到顶点V(RESP。,u)的距离的顶点数,并且N0(e | g)是从e两端等距的顶点的数量 。 让M(2)是具有订单2的单环图集和完美匹配。 在本文中,我们确定了Szeged索引的最小值,并在具有完美匹配的所有单结构图中具有最小级别指数的极值图。

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  • 作者单位

    Hunan Normal Univ Key Lab High Performance Comp &

    Stochast Informat Minist Educ China Coll Math &

    Stat Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab High Performance Comp &

    Stochast Informat Minist Educ China Coll Math &

    Stat Changsha 410081 Hunan Peoples R China;

    Hunan Normal Univ Key Lab High Performance Comp &

    Stochast Informat Minist Educ China Coll Math &

    Stat Changsha 410081 Hunan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 最优化的数学理论;
  • 关键词

    Szeged index; Unicyclic graphs; Perfect matching;

    机译:塞格德指数;单环图;完美匹配;

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