Enlarging the functional space of decay estimates on semigroups

Details Enlarging the functional space of decay estimates on semigroups Enlarging the functional space of decay estimates on semigroups

2009-12-09

arxiv.org/abs/0912.1747v2

Mathematics

Analysis of PDEs

7 pages

Scientific paper

This note briefly presents a new method for enlarging the functional space of a "spectral-gap-like" estimate of exponential decay on a semigroup. A particular case of the method was first devised in hal-00076709 for the spatially homogeneous Boltzmann equation, and a variant was used in Ref. hal-00124876 in the same context for inelastic collisions. We present a generalized abstract version of it, a short proof of the algebraic core of the method, and a new application to the Fokker-Planck equation. More details and other applications shall be found in the work in preparation Ref. [3] (another application to quantum kinetic theory can be found in the work in preparation Ref. [4]).

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