Existence of positive periodic solutions for neutral logarithmic population model with multiple delays

摘要

In this paper, the authors employ an abstract continuous theorem of k-set contractive operator to study the existence of positive periodic solutions for a neutral delay logarithmic population model with multiple delays as follows:dNdt=N(t)r(t)−∑j=1nai(t)lnN(t−σi(t))−∑i=1mbj(t)ddtlnN(t−τj(t)).A new result on the existence of positive periodic solutions is obtained.