Hedgehogs are not colour blind
We exhibit a family of 3-uniform hypergraphs with the property that their 2-colour Ramsey numbers grow polynomially in the number of vertices, while their 4-colour Ramsey numbers grow exponentially. This is the first example of a class of hypergraphs whose Ramsey numbers show a strong dependence on...
Main Authors: | Conlon, D, Fox, J, Rödl, V |
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Format: | Journal article |
Published: |
International Press
2017
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