Erdős problem 212 · problems.science

Is there a dense subset of ℝ^2 such that all pairwise distances are rational?

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Problem row: sha256:1edf74378090bdd1f11ca2529ec8a228abca1010cef170b06cea07fba2eef735
Metadata: sha256:649a67aa8f4366827206e5548ab0ae80894c3ed21c1a23baf9625a7505abea04
Observation: sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content: sha256:64ce0ba222614296d4acacd9ae4b1a34b4ae3b7fe4f093aed5c5dac22ec4e7ce

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