Erdős problem 199 · problems.science

If $A\subset \mathbb{R}$ does not contain a 3-term arithmetic progression then must $\mathbb{R}\backslash A$ contain an infinite arithmetic progression?

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Problem row: sha256:1a797d9887ad74be7b117f40e17dbadbb955e377081096ea23b68dc74c9146d9
Metadata: sha256:852bc5574820ed7aabf321b60aa147ee030d7fac4b841b5c08fabc8a4e3da6bd
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:ce28703f7931c973c409e31c38f03ff7c4abece5679c04428b7e322560ee57ba

Repository: sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection: sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit: 2415f78e850aeee50afdca525c6f2e0ea606f207

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