Imp.¹: Importance (Low ✭, Medium ✭✭, High ✭✭✭, Outstanding ✭✭✭✭)

Rec.²: Recommended for undergraduates.

Note: Resolved problems from this section may be found in Solved problems.

- Subject
- Algebra (6)
- Analysis (5)
- Combinatorics (32)
- Geometry (27)
- Graph Theory (222)
- Group Theory (5)
- Logic (11)
- Number Theory (47)
- Theoretical Comp. Sci. (13)
- Topology (35)
- Unsorted (2)

- Author index
- Keyword index