Existence and Stability for Fokker-Planck equations with log-concave reference measure

Details Existence and Stability for Fokker-Planck equations with log-concave reference measure Existence and Stability for Fokker-Planck equations with log-concave reference measure

2007-04-19

arxiv.org/abs/0704.2458v1

Mathematics

Probability

Scientific paper

We study Markov processes associated with stochastic differential equations, whose non-linearities are gradients of convex functionals. We prove a general result of existence of such Markov processes and a priori estimates on the transition probabilities. The main result is the following stability property: if the associated invariant measures converge weakly, then the Markov processes converge in law. The proofs are based on the interpretation of a Fokker-Planck equation as the steepest descent flow of the relative Entropy functional in the space of probability measures, endowed with the Wasserstein distance. Applications include stochastic partial differential equations and convergence of equilibrium fluctuations for a class of random interfaces.

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