Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8959473 | Journal of Functional Analysis | 2018 | 49 Pages |
Abstract
This work deals with free transport equations with partly diffuse stochastic boundary operators in slab geometry. Such equations are governed by stochastic semigroups in L1 spaces. We prove convergence to equilibrium at the rate O(tâk2(k+1)+1)(tâ+â) for L1 initial data g in a suitable subspace of the domain of the generator T where kâN depends on the properties of the boundary operators near the tangential velocities to the slab. This result is derived from a quantified version of Ingham's tauberian theorem by showing that Fg(s):=limεâ0+â¡(is+εâT)â1g exists as a Ck function on R\{0} such that âdjdsjFg(s)ââ¤C|s|2(j+1) near s=0 and bounded as |s|ââ(0â¤jâ¤k). Various preliminary results of independent interest are given and some related open problems are pointed out.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Mustapha Mokhtar-Kharroubi, David Seifert,