Extremal trees with fixed degree sequence for atom-bond connectivity index

Extremal trees with fixed degree sequence for atom-bond connectivity index
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DOI:
10.2298/fil1204683x
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发表时间:
2012-11-01
期刊:
影响因子:
0.8
通讯作者:
Zhou, Bo
Zhou, Bo
中科院分区:
数学4区
文献类型:
--
作者:
Xing, Rundan;Zhou, Bo

文献摘要

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图G的原子键连通性(ABC)指数是根d(u)+ d(v)-2/d(u)d(v)在G的所有边uv上的和,其中d(u)是顶点u在G中的度。我们分别用固定度序列刻画了ABC指数最大化和最小化的极值树。我们还提供了构造这种树的算法。
The atom-bond connectivity (ABC) index of a graph G is the sum of root d(u)+ d(v)-2/d(u)d(v) over all edges uv of G, where d(u) is the degree of vertex u in G. We characterize the extremal trees with fixed degree sequence that maximize and minimize the ABC index, respectively. We also provide algorithms to construct such trees.