摘要
本文研究中立型对数种群模型 用重合度理论,获得了至少存在一个周期正解的充分条件.
By using the coincidence theory,this paper studies a neutral delay logarithmic population medel to which is obtained some sufficient conditinos for at least a positive periodic solution.
出处
《汕头大学学报(自然科学版)》
2000年第2期62-65,共4页
Journal of Shantou University:Natural Science Edition