English

Large monochromatic components in colorings of complete hypergraphs

Combinatorics 2023-12-27 v2

Abstract

Gy\'arf\'as famously showed that in every rr-coloring of the edges of the complete graph KnK_n, there is a monochromatic connected component with at least nr1\frac{n}{r-1} vertices. A recent line of study by Conlon, Tyomkyn, and the second author addresses the analogous question about monochromatic connected components with many edges. In this paper, we study a generalization of these questions for kk-uniform hypergraphs. Over a wide range of extensions of the definition of connectivity to higher uniformities, we provide both upper and lower bounds for the size of the largest monochromatic component that are tight up to a factor of 1+o(1)1+o(1) as the number of colors grows. We further generalize these questions to ask about counts of vertex ss-sets contained within the edges of large monochromatic components. We conclude with more precise results in the particular case of two colors.

Keywords

Cite

@article{arxiv.2302.04487,
  title  = {Large monochromatic components in colorings of complete hypergraphs},
  author = {Lyuben Lichev and Sammy Luo},
  journal= {arXiv preprint arXiv:2302.04487},
  year   = {2023}
}

Comments

14 pages

R2 v1 2026-06-28T08:35:41.197Z