摘要
本文给出具有常数收获率的Ｖｏｌｔｅｒｒａ二次系统存在代数分界线环的充要条件．
in this paper the author gives out sufficient and nacessary conditions for the existence of separatrix cycle of parabolic bow of Volterra quadratic differential system with constant-rate prey hervesing.
出处
《辽宁师范大学学报（自然科学版）》
CAS
1994年第1期6-11,共6页
Journal of Liaoning Normal University:Natural Science Edition
关键词
二次系统
抛物弓形
分界线环
食饵
quadratic system
point singularity
saddle point
parabolic bow
limit Cycle
separatrix cycle
