Global asymptotic stability for Gurtin-MacCamy’s population dynamics model

Ma, Zhaohai; Magal, Pierre

doi:10.1090/proc/15629

Global asymptotic stability for Gurtin-MacCamy’s population dynamics model
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by Zhaohai Ma and Pierre Magal

Proc. Amer. Math. Soc. 152 (2024), 765-780

DOI: https://doi.org/10.1090/proc/15629

Published electronically: November 7, 2023

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Abstract:

In this paper, we investigate the global asymptotic stability of an age-structured population dynamics model with a Ricker’s type of birth function. This model is a hyperbolic partial differential equation with a nonlinear and nonlocal boundary condition. We prove a uniform persistence result for the semiflow generated by this model. We obtain the existence of global attractors and we prove the global asymptotic stability of the positive equilibrium by using a suitable Lyapunov functional. Furthermore, we prove that our global asymptotic stability result is sharp, in the sense that Hopf bifurcation may occur as close as we want from the region global stability in the space of parameter.

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