中文

可嵌入可定向曲面的图的列表着色数相对于色数的差距

组合数学 2022-01-04 v2

摘要

我们证明了对于环面上的无环 66-正则三角剖分,其列表着色数(choice number)与色数(chromatic number)之间的差距至多为 22。我们还证明了可嵌入亏格为 gg 的可定向曲面的图的最大差距为 Θ(g)\Theta(\sqrt{g}) 阶,而且对于色数为 o(g/log2(g))o(\sqrt{g}/\log_{2}(g)) 阶的图,最大差距为 o(g)o(\sqrt{g}) 阶。

关键词

引用

@article{arxiv.2102.06993,
  title  = {The choice number versus the chromatic number for graphs embeddable on orientable surfaces},
  author = {Niranjan Balachandran and Brahadeesh Sankarnarayanan},
  journal= {arXiv preprint arXiv:2102.06993},
  year   = {2022}
}

备注

17 pages, 6 figures; changed notation of the triangulations to T(r, s, t) from T(s, r, t), added a reference in the last section, corrected typos