- Topology (3)
- Banach algebras (2)
- Set theory (2)
- Algorithms (1)
- Functional analysis (1)
- Geometry, Differential (1)
- Nonlinear functional analysis--Addresses, essays, lectures (1)
- Recursive functions (1)
- Rings (Algebra) (1)
- Topological dynamics (1)
- 実関数論 (1)
- 関数論．解析的多様体 (1)