2017/10/31 by Vincent Bansaye, Bertrand Cloez, Pierre Gabriel · 54 citations
Biochemistry, Genetics and Molecular Biology · Economics, Econometrics and Finance · Mathematics · #Applied mathematics #Combinatorics #Convergence (economics) #Diffusion and Search Dynamics #Ergodic theory #Homogeneity (statistics) #Homogeneous #Mathematical analysis #Mathematics #Partial differential equation #Population #Population model #Pure mathematics #Semigroup #Statistics #Stochastic processes and financial applications #Stochastic processes and statistical mechanics #math.AP #math.PR
paper · pdf · doi:10.1007/s10440-019-00253-5
published in Acta Applicandae Mathematicae 166(1), 29-72 (Springer Science+Business Media)
openalex created_date 2017/11/10 · openalex publication_date 2019/04/04 · arxiv created 2019/05/09 · arxiv updated 2020/07/22 · openalex updated_date 2026/08/06
We provide quantitative estimates in total variation distance for positive semi-groups, which can be non-conservative and non-homogeneous. The techniques relies on a family of conservative semigroups that describes a typical particle and Doeblin's type conditions for coupling the associated process. Our aim is to provide quantitative estimates for linear partial differential equations and we develop several applications for population dynamics in varying environment. We start with the asymptotic profile for a growth diffusion model with time and space non-homogeneity. Moreover we provide general estimates for semigroups which become asymptotically homogeneous, which are applied to an age-structured population model. Finally, we obtain a speed of convergence for periodic semi-groups and new bounds in the homogeneous setting. They are are illustrated on the renewal equation.