34M15 Algebraic aspects (differential-algebraic, hypertranscendence, group-theoretical) of ordinary differential equations in the complex domain 390

34M25 Formal solutions and transform techniques for ordinary differential equations in the complex domain 306

34M30 Asymptotics and summation methods for ordinary differential equations in the complex domain 263

34M35 Singularities, monodromy and local behavior of solutions to ordinary differential equations in the complex domain, normal forms 1091

34M40 Stokes phenomena and connection problems (linear and nonlinear) for ordinary differential equations in the complex domain 404

34M50 Inverse problems (Riemann-Hilbert, inverse differential Galois, etc.) for ordinary differential equations in the complex domain 316

34M55 PainlevĂ© and other special ordinary differential equations in the complex domain; classification, hierarchies 2137

34M60 Singular perturbation problems for ordinary differential equations in the complex domain (complex WKB, turning points, steepest descent) [See also 34E20] 301

34M65 Topological structure of trajectories of ordinary differential equations in the complex domain 2