Necessary and Sufficient Conditions for the Existence of Periodic Solutions in a Predator-prey Model on Time Scales
نویسندگان
چکیده
This article explores the existence of periodic solutions for nonautonomous impulsive semi-ratio-dependent predator-prey systems on time scales. Based on a continuous theorem in coincidence degree theory, sharp sufficient and necessary conditions are derived in which most popular monotonic, non-monotonic and predator functional responses are applicable. This article extends the work in [6, 10, 12, 13, 14, 18, 25].
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تاریخ انتشار 2012