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J Biol Dyn. 2017 Dec;11(1):25-41. doi: 10.1080/17513758.2016.1226435.

Optimal control of the Lotka-Volterra system: turnpike property and numerical simulations.

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1
a BCAM - Basque Center for Applied Mathematics , Bilbao , Spain.

Abstract

The Lotka-Volterra model is a differential system of two coupled equations representing the interaction of two species: a prey one and a predator one. We formulate an optimal control problem adding the effect of hunting both species as the control variable. We analyse the optimal hunting problem paying special attention to the nature of the optimal state and control trajectories in long time intervals. To do that, we apply recent theoretical results on the frame to show that, when the time horizon is large enough, optimal strategies are nearly steady-state. Such path is known as turnpike property. Some experiments are performed to observe such turnpike phenomenon in the hunting problem. Based on the turnpike property, we implement a variant of the single shooting method to solve the previous optimisation problem, taking the middle of the time interval as starting point.

KEYWORDS:

34K28; 49J15; 78A70; Lotka–Volterra; indirect shooting method; optimal control; turnpike

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