Title of article :
A Class of Cubic Systems with Two Centers or Two Foci
Author/Authors :
Lansun Chen، نويسنده , , Zhengyi Lu، نويسنده , , Dongming Wang، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2000
Abstract :
In this paper, the necessary and sufficient conditions for a class of cubic
differential systems to possess two centers are given. Some conditions for the
systems to have two weak foci are also derived by using the computer algebra
system Maple.
Keywords :
center , Focus , Kukles system
Journal title :
Journal of Mathematical Analysis and Applications
Journal title :
Journal of Mathematical Analysis and Applications
