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Erdős problem 645

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If ℕ is 22-coloured then there must exist a monochromatic three-term arithmetic progression x,x+d,x+2dx,x+d,x+2d such that d>xd>x.

Erdős Problems records this as proved (Lean).

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  1. Sourceerdos-problems
  2. StatementRetained
  3. Formal1 retained
  4. Resolutionproved (Lean)
  5. WorkNone recorded
  6. DecisionNone here
  7. The questionNot reached
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Where the source files it734 share a topic
Number Theory576Ramsey Theory114Additive Combinatorics102
Erdős problem 321accepted
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