## 34Cxx Qualitative theory [See also 37-XX]

- 34C05 Location of integral curves, singular points, limit cycles
- 34C07 Theory of limit cycles of polynomial and analytic vector fields (existence, uniqueness, bounds, Hilbert`s 16th problem and ramifications)
- 34C08 Connections with real algebraic geometry (fewnomials, desingularization, zeros of Abelian integrals, etc.)
- 34C10 Oscillation theory, zeros, disconjugacy and comparison theory
- 34C11 Growth, boundedness
- 34C12 Monotone systems
- 34C14 Symmetries, invariants
- 34C15 Nonlinear oscillations, coupled oscillators (1)
- 34C20 Transformation and reduction of equations and systems, normal forms
- 34C23 Bifurcation [See also 37Gxx]
- 34C25 Periodic solutions
- 34C26 Relaxation oscillations
- 34C27 Almost and pseudo-almost periodic solutions
- 34C28 Complex behavior, chaotic systems [See also 37Dxx]
- 34C29 Averaging method
- 34C37 Homoclinic and heteroclinic solutions
- 34C40 Equations and systems on manifolds
- 34C41 Equivalence, asymptotic equivalence
- 34C45 Invariant manifolds
- 34C46 Multifrequency systems
- 34C55 Hysteresis
- 34C60 Qualitative investigation and simulation of models
- 34C99 None of the above, but in this section