The number of limit cycles that can be born from periodic solutions of a polynomial Hamiltonian planar system by a small polynomial perturbation not increasing the degree , is explicitly bounded by … more →
Sergei Yakovenko's WeblogSergei Yakovenko wrote 2 weeks ago: The number of limit cycles that can be born from periodic solutions of a polynomial Hamiltonian plan … more →
Sergei Yakovenko wrote 3 months ago: Logarithmic singularities De Rham division lemma (and its generalization) Definition of a logarithm … more →