中文

稠密随机图团色数的紧渐近性

组合数学 2022-12-05 v6

摘要

图的团色数是指为其顶点集分配颜色所需的最少颜色数,使得任意包含极大的团均非单色。McDiarmid、Mitsche与Pra\l at证明了二项随机图G(n,12)G\left(n,\frac{1}{2}\right)的团色数以高概率至多为(12+o(1))log2n\left(\frac{1}{2}+o(1)\right)\log_2n。Alon与Krivelevich证明了它以高概率大于12000log2n\frac{1}{2000}\log_2n,并推测对数前的正确常数为12\frac{1}{2}。我们证明了他们的猜想,并且进一步得到了紧集中结果:whp χc(G(n,1/2))=12log2nΘ(lnlnn)\chi_c\left(G\left(n,1/2\right)\right) = \frac{1}{2}\log_2 n - \Theta\left(\ln\ln n\right)

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引用

@article{arxiv.2012.03210,
  title  = {Tight asymptotics of clique-chromatic numbers of dense random graphs},
  author = {Yury Demidovich and Maksim Zhukovskii},
  journal= {arXiv preprint arXiv:2012.03210},
  year   = {2022}
}