2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/162825We show that the Adomian decomposition method, the time--series expansion, the homotopy--perturbation method, and the variational--iteration method completely fail to provide a reasonable description of the dynamics of the simplest prey--predator system.Mathematical PhysicsPopulations and EvolutionOn Some Perturbation Approaches to Population Dynamicstext