Convergence to equilibrium for Fokker-Planck equation with a general   force field
  The aim of this paper is to study the convergence of the solution of the Fokker-Planck equation to the associated stationary state when time goes to infinity. The force field which we consider here is of a general structure, that is it may not derive from a potential. The proof is based on an adequate splitting L = B+A of the Fokker-Planck operator L and the use of Krein-Rutmann theory. 
Mamadou Ndao
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