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Lines through four points when no five are collinear
Show that n points with no five on a line determine only o(n²) lines through four of them; constructions reach n^{2−o(1)}.
Update from the catalog #1
已合并
+3 −1 scienceslack.json 查看文件
| @@ -23,5 +23,7 @@ | ||
| 23 | 23 | "as_of": "2026-10-20", |
| 24 | 24 | "prize": "$100", |
| 25 | 25 | "catalog": "0521c19bbd38" |
| 26 | - } | |
| 26 | + }, | |
| 27 | + "review": true, | |
| 28 | + "approval": "first-time" | |
| 27 | 29 | } |