Global Attractivity and Oscillation in a Periodic“Food Limited&rdquo|Population Model with Delay
具有时滞的“食物有限”种群模型的全局吸引和振动

The nonlinear delay differential equation N′(t)=r(t)N(t)((K(t)-N(t-mω)K(t)+λ(t)N(t-mω)))] where m is positive integer, λ(t), K(t) and r(t) are positive periodic functions of period ω. Sufficient conditions for the oscillation, existence and global attractivity of the positive periodic solution of this equation are obtained. Some known results are extended and improved.