35-00 General reference works (handbooks, dictionaries, bibliographies, etc.)
35-01 Instructional exposition (textbooks, tutorial papers, etc.)
35-02 Research exposition (monographs, survey articles)
35-03 Historical (must also be assigned at least one classification number from Section 01)
35-04 Explicit machine computation and programs (not the theory of computation or programming)
35-06 Proceedings, conferences, collections, etc.
35Axx General theory
35Bxx Qualitative properties of solutions
35Cxx Representations of solutions
35Dxx Generalized solutions of partial differential equations
35Exx Equations and systems with constant coefficients [See also 35N05 ]
35Fxx General first-order equations and systems
35Gxx General higher-order equations and systems
35Hxx Close-to-elliptic equations
35Jxx Partial differential equations of elliptic type [See also 58Jxx , 58J10 , 58J20 ]
35Kxx Parabolic equations and systems [See also 35Bxx , 35Dxx , 35R30 , 35R35 , 58J35 ]
35Lxx Partial differential equations of hyperbolic type [See also 58J45 ]
35Mxx Partial differential equations of special type (mixed, composite, etc.) {For degenerate types, see 35J70 , 35K65 , 35L80 }
35Nxx Overdetermined systems [See also 58Hxx , 58Jxx , 58J10 , 58J15 ]
35Pxx Spectral theory and eigenvalue problems for partial differential operators [See also 47Axx , 47Bxx , 47F05 ]
35Qxx Equations of mathematical physics and other areas of application [See also 35J05 , 35J10 , 35K05 , 35L05 ]
35Rxx Miscellaneous topics involving partial differential equations {For equations on manifolds, see 58Jxx ; for manifolds of solutions, see 58Bxx ; for stochastic PDEs, see also 60H15 }
35Sxx Pseudodifferential operators and other generalizations of partial differential operators [See also 47G30 , 58J40 ]