[PDF][PDF] Limit cycles obtained by perturbing a degenerate center
N Rezaiki, A Boulfoul - pisrt.org
This paper deals with the maximum number of limit cycles bifurcating from the degenerate
centre x=− y (3x2+ y2), y= x (x2− y2), when we perturb it inside a class of all homogeneous …
centre x=− y (3x2+ y2), y= x (x2− y2), when we perturb it inside a class of all homogeneous …
[PDF][PDF] Maximum Number of Limit Cycles of a Second Order Differential System
A Brik, A Boulfoul - pdfs.semanticscholar.org
The limit cycle is one of the most used notion in the qualitative theory of planar differential
system recently with the arising of its maximum number determination problem. The study of …
system recently with the arising of its maximum number determination problem. The study of …