摘要
我们利用重合度理论 ,讨论了一类时滞 L ogistic方程周期正解的存在性 ,获得了一个新结果 。
In this paper, we discuss the existence of positive periodic solutions for a Logistic equation with time delay by using the theory of coincidence degree. A new result is obtained. Some related results are improved.
出处
《数学研究》
CSCD
2002年第3期261-265,共5页
Journal of Mathematical Study
基金
Supported by National Natural Sciences Foundation of China(198710 12 )
