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| Title | Author(s) | Imp.¹ | Rec.² | Topic » Subtopic | Posted by |
|---|---|---|---|---|---|
| Rendezvous on a line | Alpern | ✭✭✭ | 0 | mdevos | |
| Termination of the sixth Goodstein Sequence | Graham | ✭ | 0 | mdevos | |
| Pseudodifference of filter objects | Porton | ✭✭ | 0 | porton |
Imp.¹: Importance (Low ✭, Medium ✭✭, High ✭✭✭, Outstanding ✭✭✭✭)
Rec.²: Recommended for undergraduates.
Note: Resolved problems from this section may be found in Solved problems.