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)
- Additive N.T. (3)
- Analytic N.T. (10)
- Combinatorial N.T. (12)
- Computational N.T. (5)

- Theoretical Comp. Sci. (13)
- Topology (40)
- Unsorted (1)

- Author index
- Keyword index