Existence and nonuniqueness of solutions to a functional-differential equation
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We examine the functional-differential equation Δu(x) — div(u(H(x))f (x)) = 0 on a torus which is a generalization of the stationary Fokker-Planck equation. Under sufficiently general assumptions on the vector field f and the map H, we prove the existence of a nontrivial solution. In some cases the subspace of solutions is established to be multidimensional.
Keywordsstationary Fokker-Planck equation deviating argument
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