摘要
研究了一类二次微分方程 x =- y +δx +mxy +y2 , y =x(1+by)的极限环的存在性问题 .
The existence problems of limit cycles for a class of quadratic differential equation =-y+δx+mxy+y 2, =x(1+by) are studied. The conditions were given to ensure the system have a unique stable or unstable limit cycle.
出处
《曲阜师范大学学报(自然科学版)》
CAS
2002年第4期53-55,共3页
Journal of Qufu Normal University(Natural Science)