Erdős problem 846
Erdős Problem 846 LetA ⊂ ℝ²be an infinite set for which there exists someϵ>0such that in any subset ofAof sizenthere are always at leastϵnwith no three on a line. Is it true thatAis the union of a finite number of sets where no three are on a line?
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- Erdős Problems says
- disproved (Lean)
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