摘要
讨论了一类有无穷时滞的生态系统,当条件(k)成立时,给出解的振动性条件,若核是弱时滞的,则证明了非常数周期解的存在性.
In this paper, a ecology system with infinite delay is discussed, when the condition(K) is held, the conditions for the solutions of this system to be oscillational is given. If the kernel is weakly retarded, the existence of the nonconstant periodic solution is proved.
出处
《四川大学学报（自然科学版）》
CAS
CSCD
1991年第1期26-35,共10页
Journal of Sichuan University(Natural Science Edition)
关键词
生态系统
无穷时滞
非常数周期解
ecology system
infinite delay
nonconsfant periodic solution
