2013/03/14 by John A. D. Appleby, Appleby, John A. D., Denis Patterson +2
Mathematics · Medicine · #34D05 #34D20 #93D09 #93D20 #Classical Analysis and ODEs (math.CA) #Differential Equations and Numerical Methods #FOS: Mathematics #Mathematical and Theoretical Epidemiology and Ecology Models #Nonlinear Differential Equations Analysis #math.CA #msc:34D05 #msc:34D20 #msc:93D09 #msc:93D20
paper · pdf · doi:10.48550/arxiv.1303.3345
33 pages, to appear Electronic Journal of Qualitative Theory of Differential Equations, Proc. 10th Coll. Qualitative Theory of Diff. Equ. (July 1--4, 2015, Szeged, Hungary)
openalex publication_date 2013/03/14 · arxiv created 2016/07/10 · arxiv updated 2016/07/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this paper we consider the rate of convergence of solutions of a scalar ordinary differential equation which is a perturbed version of an autonomous equation with a globally stable equilibrium. Under weak assumptions on the nonlinear mean reverting force, we demonstrate that the convergence rate is preserved when the perturbation decays more rapidly than a critical rate. At the critical rate, the convergence to equilibrium is slightly slower than the unperturbed equation, and when the perturbation decays more slowly than the critical rate, the convergence to equilibrium is strictly slower than that seen in the unperturbed equation. In the last case, under strengthened assumptions, a new convergence rate is recorded which depends on the convergence rate of the perturbation. The latter result relies on the function being regularly varying at the equilibrium with index greater than unity; therefore, for this class of regularly varying problems, a classification of the convergence rates is obtained.