## 47-XX OPERATOR THEORY

- 47-00 General reference works (handbooks, dictionaries, bibliographies, etc.)
- 47-01 Instructional exposition (textbooks, tutorial papers, etc.)
- 47-02 Research exposition (monographs, survey articles)
- 47-03 Historical (must also be assigned at least one classification number from Section 01)
- 47-04 Explicit machine computation and programs (not the theory of computation or programming)
- 47-06 Proceedings, conferences, collections, etc.
- 47Axx General theory of linear operators (5)
- 47Bxx Special classes of linear operators (3)
- 47Cxx Individual linear operators as elements of algebraic systems
- 47Dxx Groups and semigroups of linear operators, their generalizations and applications (2)
- 47Exx Ordinary differential operators [See also 34Bxx, 34Lxx]
- 47Fxx Partial differential operators [See also 35Pxx, 58Jxx]
- 47Gxx Integral, integro-differential, and pseudodifferential operators [See also 58Jxx]
- 47Hxx Nonlinear operators and their properties (For global and geometric aspects, see 58-XX, especially 58Cxx) (2)
- 47Jxx Equations and inequalities involving nonlinear operators [See also 46Txx] (For global and geometric aspects, see 58-XX) (3)
- 47Lxx Linear spaces and algebras of operators [See also 46Lxx]
- 47Nxx Miscellaneous applications of operator theory [See also 46Nxx]
- 47Sxx Other (nonclassical) types of operator theory [See also 46Sxx]