The diameter sphere theorem up to diffeomorphism
Decide whether a manifold with sectional curvature at least 1 and diameter above π/2 must be diffeomorphic to the standard sphere.
Update from the catalog #1
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| @@ -13,5 +13,7 @@ | ||
| 13 | 13 | "status": "open", |
| 14 | 14 | "as_of": "2026-10-20", |
| 15 | 15 | "catalog": "0521c19bbd38" |
| 16 | - } | |
| 16 | + }, | |
| 17 | + "review": true, | |
| 18 | + "approval": "first-time" | |
| 17 | 19 | } |