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Kohayakawa-Prömel-Rödl Conjecture


The Kohayakawa-Prömel-Rödl conjecture asserts that, for every fixed finite simple graph G, there is a constant c(G) such that

 r_(ind)(G,H)<=n^(c(G))

for every simple graph H of graph order n>=2. Here r_(ind) is the induced Ramsey number. Zhong et al. (2026) proved the conjecture by establishing

 r_(ind)(G,H)<=7n^(60k^2)<=n^(60k^2+3)

for k=|V(G)|>=2. Thus c(G)=60k^2+3 suffices. The polynomial dependence on |V(H)| requires G to be fixed. It does not give a polynomial diagonal bound in the common graph order.


See also

Induced Ramsey Number, Ramsey Number

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References

Zhong, C.; Kashima, M.; and Mao, Y. "A Solution to the Kohayakawa-Prömel-Rödl Conjecture." 20 Oct 2026. https://arxiv.org/abs/2610.27478.

Cite this as:

Weisstein, Eric W. "Kohayakawa-Prömel-Rödl Conjecture." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Kohayakawa-Promel-RodlConjecture.html

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