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Permanence of Predator-prey System with Logistic Growth in the Prey

Liu Huimin 1,Shang Dan 2 (1.Department of Mathematics,Anshan Normal University,Anshan?114005,China; 2.Higher Vocational Institute of ASHUST,Anshan?114002,China)  
The nonautonomous predator prey model with logistic growth in the prey is considered. It is shown that the system is permanent under some appropriate conditions. Inaddition, for the periodic system there is a unique positive periodic solution which is globally asymptotically stable.
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