Relaxation Oscillations and Dynamical Properties in a Time Delay Slow–Fast Predator–Prey Model with a Piecewise Smooth Functional Response

Youhua Qian, Yuhui Peng, Yufeng Wang and Bingwen Lin
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Youhua Qian: College of Mathematics and Computer Science, Zhejiang Normal University, Jinhua 321004, China
Yuhui Peng: College of Mathematics and Computer Science, Zhejiang Normal University, Jinhua 321004, China
Yufeng Wang: College of Mathematics and Computer Science, Zhejiang Normal University, Jinhua 321004, China
Bingwen Lin: College of Mathematics and Computer Science, Zhejiang Normal University, Jinhua 321004, China

Mathematics, 2022, vol. 10, issue 9, 1-11

Abstract: In the past few decades, the predator–prey model has played an important role in the dynamic behavior of populations. Many scholars have studied the stability of the predator–prey system. Due to the complex influence of time delay on the dynamic behavior of systems, time-delay systems have garnered wide interest. In this paper, a classical piecewise smooth slow–fast predator–prey model is considered. The dynamic properties of the system are analyzed by linearization. The existence and uniqueness of the relaxation oscillation are then proven through the geometric singular perturbation theory and entry–exit function. Finally, a stable limit cycle is obtained. A numerical simulation verifies our results for the systems and shows the effectiveness of the method in dealing with time delays.

Keywords: slow–fast predator–prey model; relaxation oscillation cycle; geometric singular perturbation theory; entry–exit function; time delay (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
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