Abstract
It is known that the Lotka-Volterra coupled nonlinear differential equations for a two-species prey-predator ecosystem possess a periodic solution, although its exact form is not yet obtained analytically. The conventional linearization approximation for solving these nonlinear equations leads to a harmonic oscillator whose frequency depends only on the intraspecific coefficients. We propose here a prescription for obtaining nonlinear correction to the linear frequency by using the Hamilton-Jacobi canonical formalism of classical mechanics. It is found that the first-order correction, which also involves interspecific parameters, exhibits the basic qualitative features of the nonlinearity.
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Dutt, R. Application of Hamilton-Jacobi theory to the Lotka-Volterra oscillator. Bltn Mathcal Biology 38, 459–465 (1976). https://doi.org/10.1007/BF02462220
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DOI: https://doi.org/10.1007/BF02462220