中文

平面图与树幂的队列布局及无重复着色

组合数学 2021-03-15 v2

摘要

Dujmović、Joret、Micek、Morin、Ueckerdt 和 Wood 最近在 [Planar graphs have bounded queue-number, Journal of the ACM, Volume 67, Issue 4, Article No.: 22, August 2020] 中给出了一些吸引人的平面图图积结构定理。利用该积结构,他们证明了平面图的队列数有界为 4848;在 [Planar graphs have bounded nonrepetitive chromatic number, Advances in Combinatorics, 5, 11 pp, 2020] 中,作者证明了平面图的无重复色数有界为 768768。本文仍利用某一积结构定理,将平面图的队列数上界改进至 2727,无重复色数改进至 320320。我们还研究了树幂。我们给出了树 TTkk 次幂 TkT^k 的图积结构定理,并由此给出 TkT^k 无重复色数的上界。我们还给出了 TkT^k 队列数的渐近紧上界。

关键词

引用

@article{arxiv.2103.04670,
  title  = {Queue layouts and nonrepetitive colouring of planar graphs and powers of trees},
  author = {Jiaqi Wang and Daqing Yang},
  journal= {arXiv preprint arXiv:2103.04670},
  year   = {2021}
}

备注

There are some mistakes in the proof of Theorem 2.2, this leads to the fact that some major results are wrong