34C07 - Theory of limit cycles of polynomial and analytic vector fields (existence, uniqueness, bounds, Hilbert’s 16th problem and ramifications) for ordinary differential equations [MSC 2020]
34C23 - Bifurcation theory for ordinary differential equation [MSC 2020]
37-XX - Dynamical systems and ergodic theory [MSC 2020]
37Gxx - Local and nonlocal bifurcation theory for dynamical systems [MSC 2020]