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Erdős problem 1090

Let k3k\geq 3. Does there exist a finite set AR2A\subset \mathbb{R}^2 such that, in any 22-colouring of AA, there exists a line which contains at least kk points from AA, and all the points of AA on the line have the same colour?

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  • AI building on literature

    Erdős AI contributions wiki · 27 Feb, 2026

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    Aristotle, Gemini 3 Flash
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