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arXiv 2209.11271math.CO
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树的Kemeny常数和Wiener指标

Kemeny's constant and Wiener index on trees

Jihyeug Jang, Sooyeong Kim, Minho Song

摘要:

在固定阶树上,我们证明了Kemeny常数与Wiener指标之间的直接关系,并从组合解释的关系中给出了Kemeny常数的新公式。此外,该关系简化了几个已知的结果的极值树的Kemeny常数的随机游动树。最后,我们给出了具有相同Kemeny常数的两个非同构连通图的各种co-Kemeny的配偶族,并给出了一棵树在固定直径的情况下获得最大Kemeny常数的一个必要条件.

英文摘要:

On trees of fixed order, we show a direct relation between Kemeny's constant and Wiener index, and provide a new formula of Kemeny's constant from the relation with a combinatorial interpretation. Moreover, the relation simplifies proofs of several known results for extremal trees in terms of Kemeny's constant for random walks on trees. Finally, we provide various families of co-Kemeny's mates, which are two non-isomorphic connected graphs with the same Kemeny's constant, and we also give a necessary condition for a tree to attain maximum Kemeny's constant for trees with fixed diameter.

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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