## Chaos in predator-prey systems with/without impulsive effect.(English)Zbl 1238.34086

Summary: We prove analytically that the seasonal effect can cause chaos in predator-prey systems. Our method of proof is based on some recent results on topological horseshoes. Some applications in systems with impulsive effect are given.

### MSC:

 34C28 Complex behavior and chaotic systems of ordinary differential equations 37N25 Dynamical systems in biology 92D40 Ecology 34A37 Ordinary differential equations with impulses
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### References:

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