Strong solutions of semilinear parabolic equations with measure data and generalized backward stochastic differential equations

Details Strong solutions of semilinear parabolic equations with measure data and generalized backward stochastic differential equations Strong solutions of semilinear parabolic equations with measure data and generalized backward stochastic differential equations

2010-05-11

arxiv.org/abs/1005.1793v1

Mathematics

Probability

Scientific paper

We prove that under natural assumptions on the data strong solutions in Sobolev spaces of semilinear parabolic equations in divergence form involving measure on the right-hand side may be represented by solutions of some generalized backward stochastic differential equations. As an application we provide stochastic representation of strong solutions of the obstacle problem be means of solutions of some reflected backward stochastic differential equations. To prove the latter result we use a stochastic homographic approximation for solutions of the reflected backward equation. The approximation may be viewed as a stochastic analogue of the homographic approximation for solutions to the obstacle problem.

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