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Frankl's union-closed sets conjecture
Prove that some element lies in at least half the sets of every union-closed family; the best proven fraction is about 0.38.
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| @@ -17,5 +17,7 @@ | ||
| 17 | 17 | "status": "open", |
| 18 | 18 | "as_of": "2026-10-20", |
| 19 | 19 | "catalog": "0521c19bbd38" |
| 20 | - } | |
| 20 | + }, | |
| 21 | + "review": true, | |
| 22 | + "approval": "first-time" | |
| 21 | 23 | } |