In this paper we establish sufficient conditions for uniform persistence in nonautonomous Kolmogorov-type delayed population models. The method involves the construction of a set of proper autonomous ordinary differential systems whose solutions can serve as lower or upper bounds for the delayed system in certain regions. The results are new even for nonautonomous ordinary differential systems.
- Kolmogorov-type population models
- Lotka-Volterra systems
- Nonautonomous delayed systems
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