一类有限食物人口模型正解的振动性

Oscillation of Positive Solutions of a Food-limited Population Model

研究了一类有限食物人口模型N′(t) =r(t)N(t) 1 -N(t -τ)1 +cN(t -τ)的正解关于正平衡点的振动性 ,获得了其正解关于正平衡点 N

The oscillation of positive solutions about the positive equilibrium.of a food limited population model =1 of a food limited population model N′(t)=r(t)N(t)1-N(t-τ)1+cN(t-τ) is investigated, We obtain a sufficient condition of the oscillation about the positive equilibrium =1.