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| Type | Title | Author | Replies | Last Post |
|---|---|---|---|---|
| category | Tóth, Csaba D. | Anonymous | 0 | 15 years 50 weeks ago |
| Open problem | Frankl's union-closed sets conjecture | tchow | 2 | 16 years 6 days ago |
| category | total order | Anonymous | 0 | 16 years 1 week ago |
| category | linear order | Anonymous | 0 | 16 years 1 week ago |
| category | filter bases | Anonymous | 0 | 16 years 1 week ago |
| category | chain | Anonymous | 0 | 16 years 1 week ago |
| Open problem | Chain-meet-closed sets | porton | 0 | 16 years 1 week ago |
| forum topic | Suggestion: Catalog of open problem sites | porton | 0 | 16 years 2 weeks ago |
| Open problem | Double-critical graph conjecture | DFR | 2 | 16 years 3 weeks ago |
| category | filters | Anonymous | 0 | 16 years 3 weeks ago |
| Open problem | Shuffle-Exchange Conjecture | Vadim Lioubimov | 0 | 16 years 3 weeks ago |
| category | filters,pseudodifference | Anonymous | 0 | 16 years 4 weeks ago |
| Open problem | Strong colorability | berger | 5 | 16 years 4 weeks ago |
| Open problem | On Gersgorin Theorem | Miwa Lin | 3 | 16 years 5 weeks ago |
| category | edge-cut | mdevos | 0 | 16 years 6 weeks ago |
| category | algorithm | Anonymous | 0 | 16 years 6 weeks ago |
| Open problem | Is there an algorithm to determine if a triangulated 4-manifold is combinatorially equivalent to the 4-sphere? | rybu | 0 | 16 years 6 weeks ago |
| Open problem | What is the homotopy type of the group of diffeomorphisms of the 4-sphere? | rybu | 0 | 16 years 6 weeks ago |
| category | diffeomorphisms | Anonymous | 0 | 16 years 6 weeks ago |
| category | 3-manifold | Anonymous | 0 | 16 years 6 weeks ago |
| category | embedding | Anonymous | 0 | 16 years 6 weeks ago |
| category | 4-sphere | Anonymous | 0 | 16 years 6 weeks ago |
| category | Kirby | Anonymous | 0 | 16 years 6 weeks ago |
| Open problem | Which compact boundaryless 3-manifolds embed smoothly in the 4-sphere? | rybu | 0 | 16 years 6 weeks ago |
| category | subsets of euclidean space | Anonymous | 0 | 16 years 6 weeks ago |
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