Renato Vásquez Universidad Técnica Federico Santa María, Valparaíso, CHILE
Jorge Billeke Universidad de Santiago de Chile, Santiago, CHILE
Abstract.
In this paper we prove the existence of four infinitesimal limit cycles bifurcating from infinity for a class of planar cubic systems. Necessary and sufficient conditions to obtain a center for that class are established.
Palabras claves. Limit cycles, cubic systems, center conditions.
