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| Type | Title | Author | Replies | Last Post |
|---|---|---|---|---|
| category | Knor, Martin | Robert Samal | 0 | 18 years 11 weeks ago |
| category | Steiner triple system | Anonymous | 0 | 18 years 11 weeks ago |
| Open problem | Universal Steiner triple systems | macajova | 0 | 18 years 11 weeks ago |
| category | cubic graph | Anonymous | 0 | 18 years 11 weeks ago |
| category | permutation | Anonymous | 0 | 18 years 11 weeks ago |
| category | monotone arithmetic progression | Anonymous | 0 | 18 years 11 weeks ago |
| category | Entringer, Roger C. | Anonymous | 0 | 18 years 11 weeks ago |
| category | Simmons, Gustavus J. | Anonymous | 0 | 18 years 11 weeks ago |
| Open problem | Monotone 4-term Arithmetic Progressions | vjungic | 0 | 18 years 11 weeks ago |
| category | Davis, James A. | Anonymous | 0 | 18 years 11 weeks ago |
| category | odd distance | mdevos | 0 | 18 years 11 weeks ago |
| category | Rosenstiehl, Pierre | mdevos | 0 | 18 years 11 weeks ago |
| category | Bermond, Jean-Claude | mdevos | 0 | 18 years 11 weeks ago |
| category | cycles | Anonymous | 0 | 18 years 11 weeks ago |
| Open problem | The Bermond-Thomassen Conjecture | JS | 0 | 18 years 11 weeks ago |
| Open problem | Continous analogue of Hirsch conjecture | deza | 0 | 18 years 12 weeks ago |
| category | arrangement | Anonymous | 0 | 18 years 12 weeks ago |
| Open problem | Average diameter of a bounded cell of a simple arrangement | deza | 0 | 18 years 12 weeks ago |
| category | Deza, Antoine | Anonymous | 0 | 18 years 12 weeks ago |
| category | Terlaky, Tamas | Anonymous | 0 | 18 years 12 weeks ago |
| category | Zinchenko, Yuriy | Anonymous | 0 | 18 years 12 weeks ago |
| Open problem | Drawing disconnected graphs on surfaces | mdevos | 1 | 18 years 12 weeks ago |
| category | Hamiltonian cycle | Anonymous | 0 | 18 years 12 weeks ago |
| category | Savage, Carla | Anonymous | 0 | 18 years 12 weeks ago |
| Open problem | Matchings extend to Hamiltonian cycles in hypercubes | Jirka | 0 | 18 years 12 weeks ago |
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