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Erdős problem 844

Let A⊆{1,…,N}A\subseteq \{1,\ldots,N\} be such that, for all a,b∈Aa,b\in A, the product abab is not squarefree.

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Problem row
sha256:f1f019a132fafcc78f328a45fe43315d25c8725622e533adac753dd3ff78fe56
Metadata
sha256:4ce0d00f340cb1029362d5f2cc1aaaeaff878d79cdf962517433ae680502ea46
Observation
sha256:8c823d621b7e1256c8e47c60a5f1c54c016a5507e6f27b2bab537f6f5f232067
Content
sha256:75057e275473c3f490974531729b749463fe25724350d7ed1c5c811ddee8b280
Repository
sha256:a956b84c437202e5a02cc9e036a621bd14a302b34a75758115730bdbb77c52a4
Projection
sha256:c9d14c459c518937e758918b5897dc3b22f1a55f07739afe99502f5b046c907a
Source commit
2415f78e850aeee50afdca525c6f2e0ea606f207
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