English

A property on monochromatic copies of graphs containing a triangle

Combinatorics 2023-04-11 v1

Abstract

A graph HH is called common and respectively, strongly common if the number of monochromatic copies of HH in a 2-edge-coloring ϕ\phi of a large clique is asymptotically minimised by the random coloring with an equal proportion of each color and respectively, by the random coloring with the same proportion of each color as in ϕ\phi. A well-known theorem of Jagger, {\v S}t'ov{\' i}{\v c}ek and Thomason states that every graph containing a K4K_4 is not common. Here we prove an analogous result that every graph containing a K3K_3 and with at least four edges is not strongly common.

Keywords

Cite

@article{arxiv.2304.04601,
  title  = {A property on monochromatic copies of graphs containing a triangle},
  author = {Hao Chen and Jie Ma},
  journal= {arXiv preprint arXiv:2304.04601},
  year   = {2023}
}