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| нерешённая задача; неисследованная проблема; открытая проблема; открытая проблема (It remains an open problem whether one could improve upon this bound.) | |||
| открытая задача (ssn) | |||
| open problem: 17 phrases in 8 subjects |
| Diplomacy | 1 |
| Economy | 1 |
| General | 1 |
| Makarov | 3 |
| Mathematics | 5 |
| Military | 1 |
| Programming | 4 |
| Scientific | 1 |