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arXiv · 2412.19461

On tight tree-complete hypergraph Ramsey numbers

Jiaxi Nie
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Abstract

Chvátal showed that for any tree $T$ with $k$ edges the Ramsey number $R(T,n)=k(n-1)+1$ ("Tree-complete graph Ramsey numbers." Journal of Graph Theory 1.1 (1977): 93-93). For $r=3$ or $4$, we show that, if $T$ is an $r$-uniform non-trivial tight tree, then the hypergraph Ramsey number $R(T,n)=Θ(n^{r-1})$. The 3-uniform result comes from observing a construction of Cooper and Mubayi. The main contribution of this paper is the 4-uniform construction, which is inspired by the Cooper-Mubayi 3-uniform construction.

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Jiaxi Nie. 2024-12-27. On tight tree-complete hypergraph Ramsey numbers. https://arxiv.org/abs/2412.19461

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