33E10 Lamé, Mathieu, and spheroidal wave functions

33E12 Mittag-Leffler functions and generalizations

33E20 Other functions defined by series and integrals

33E30 Other functions coming from differential, difference and integral equations

33E50 Special functions in characteristic $p$ (gamma functions, etc.)

33E99 None of the above, but in this section

33F05 Numerical approximation and evaluation [See also <a href="#code:65D20">65D20</a>]

33F10 Symbolic computation (Gosper and Zeilberger algorithms, etc.) [See also <a href="#code:68W30">68W30</a>]

33F99 None of the above, but in this section

34-00 General reference works (handbooks, dictionaries, bibliographies, etc.)

34-01 Instructional exposition (textbooks, tutorial papers, etc.)

34-02 Research exposition (monographs, survey articles)

34-03 Historical (must also be assigned at least one classification number from Section 01)

34-04 Explicit machine computation and programs (not the theory of computation or programming)

34-06 Proceedings, conferences, collections, etc.

34A09 Implicit equations, differential-algebraic equations [See also <a href="#code:65L80">65L80</a>]

34A12 Initial value problems, existence, uniqueness, continuous dependence and continuation of solutions

34A25 Analytical theory: series, transformations, transforms, operational calculus, etc. [See also <a href="#code:44-XX">44-XX</a>]

34A26 Geometric methods in differential equations

34A30 Linear equations and systems, general

34A34 Nonlinear equations and systems, general

34A35 Differential equations of infinite order

34A37 Differential equations with impulses

34A40 Differential inequalities [See also <a href="#code:26D20">26D20</a>]

34A45 Theoretical approximation of solutions {For numerical analysis, see <a href="#code:65Lxx">65Lxx</a>}

34A60 Differential inclusions [See also <a href="#code:49J21">49J21</a>, <a href="#code:49K21">49K21</a>]

34A99 None of the above, but in this section

34Bxx Boundary value problems {For ordinary differential operators, see <a href="#code:34Lxx">34Lxx</a>}