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 (7)
- Analysis (5)
- Combinatorics (36)
- Geometry (29)
- Graph Theory (226)
- Group Theory (5)
- Logic (10)
- Number Theory (48)
- Theoretical Comp. Sci. (13)
- Topology (39)
- Unsorted (1)

- Author index
- Keyword index