## 34Axx General theory

- 34A05 Explicit solutions and reductions
- 34A07 Fuzzy differential equations
- 34A08 Fractional differential equations
- 34A09 Implicit equations, differential-algebraic equations [See also 65L80]
- 34A12 Initial value problems, existence, uniqueness, continuous dependence and continuation of solutions
- 34A25 Analytical theory: series, transformations, transforms, operational calculus, etc. [See also 44-XX]
- 34A26 Geometric methods in differential equations
- 34A30 Linear equations and systems, general
- 34A33 Lattice differential equations
- 34A34 Nonlinear equations and systems, general
- 34A35 Differential equations of infinite order
- 34A36 Discontinuous equations
- 34A37 Differential equations with impulses
- 34A38 Hybrid systems
- 34A40 Differential inequalities [See also 26D20]
- 34A45 Theoretical approximation of solutions (For numerical analysis, see 65Lxx)
- 34A55 Inverse problems (1)
- 34A60 Differential inclusions [See also 49J21, 49K21]
- 34A99 None of the above, but in this section