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Periodic and traveling wave solutions to Volterra-Lotka equations with diffusion

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Abstract

Analytic and numerical solutions to two coupled nonlinear diffusion equations are studied. They are the modified equations of Volterra and Lotka for the spatially stratified predatorprey population model. In a bounded domain with the reflecting boundary, equilibrium, stability, and transition to time-periodic solutions are analyzed. For a wide class of initial states, the solutions to the initial boundary-value problem evolve into their corresponding stable, space-homogeneous, periodic oscillations. In an unbounded domain, a family of traveling wave solutions is found for certain exponential, initial distributions in the limit as the diffusion coefficientv 1 of the prey tends to zero. In the presence of both diffusions, the results of a numerical simulation to an initial-value problem showed the rapid formation of the Pursuit-Evasion Waves whose speed of propagation and amplitudes increase with the diffusion coefficientv 1.

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Chow, P.L., Tam, W.C. Periodic and traveling wave solutions to Volterra-Lotka equations with diffusion. Bltn Mathcal Biology 38, 643–658 (1976). https://doi.org/10.1007/BF02458639

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  • DOI: https://doi.org/10.1007/BF02458639

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