An age-dependent population dynamical model with a small parameter
In this paper, we consider an age-dependent population dynamical model with age interaction, where the nonlinear term depends on a small positive parameter. We prove that under weak assumptions, the solutions of the nonlinear problem give a good approximation to the solution of the linear problem. (C) 2000 Elsevier Science Ltd. All rights reserved.
population dynamics age-dependent models small parameter perturbation asymptotic theory