Ergodic BSDEs under weak dissipative assumptions

Details Ergodic BSDEs under weak dissipative assumptions Ergodic BSDEs under weak dissipative assumptions

2010-04-09

arxiv.org/abs/1004.1571v1

Mathematics

Probability

Scientific paper

In this paper we study ergodic backward stochastic differential equations (EBSDEs) dropping the strong dissipativity assumption needed in the previous work. In other words we do not need to require the uniform exponential decay of the difference of two solutions of the underlying forward equation, which, on the contrary, is assumed to be non degenerate. We show existence of solutions by use of coupling estimates for a non-degenerate forward stochastic differential equations with bounded measurable non-linearity. Moreover we prove uniqueness of "Markovian" solutions exploiting the recurrence of the same class of forward equations. Applications are then given to the optimal ergodic control of stochastic partial differential equations and to the associated ergodic Hamilton-Jacobi-Bellman equations.

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