Erdős problem 188 · problems.science

What is the smallest $k$ such that $\mathbb{R}^2$ can be red/blue coloured with no pair of red points unit distance apart, and no $k$ -term arithmetic progression of blue points with distance 1?

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188.lean

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What is the smallest $k$ such that $\mathbb{R}^2$ can be red/blue coloured with no pair of red points unit distance apart, and no $k$ -term arithmetic progression of blue points with distance 1?

FormalConjectures/ErdosProblems/188.leanErdos188.erdos_1881 lineExact file

1IsLeast Erdos188.s sorry

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