Rational limit cycles of Abel differential equations

We study the number of rational limit cycles of the Abel equation $x'=A(t)x^3+B(t)x^2$, where $A(t)$ and $B(t)$ are real trigonometric polynomials. We show that this number is at most the degree of $A(t)$ plus one.

Bibliographic Details
Main Authors: José Luis Bravo, Luis Ángel Calderón, Ignacio Ojeda
Format: Article
Language:English
Published: University of Szeged 2023-12-01
Series:Electronic Journal of Qualitative Theory of Differential Equations
Subjects:
Online Access:http://www.math.u-szeged.hu/ejqtde/periodica.html?periodica=1&paramtipus_ertek=publication&param_ertek=10640