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BSDE and generalized Dirichlet forms: The infinite dimensional case

  • Rong-Chan Zhu EMAIL logo
Published/Copyright: August 23, 2012

Abstract

We consider the following quasi-linear parabolic system of backward partial differential equations on a Banach space E: (∂t + L)u + f(·,·,u, A1/2u) = 0 on [0,T] × E, uT = φ, where L is a possibly degenerate second-order differential operator with merely measurable coefficients. We solve this system in the framework of generalized Dirichlet forms and employ the stochastic calculus associated to the Markov process with generator L to obtain a probabilistic representation of the solution u by solving the corresponding backward stochastic differential equation. The solution satisfies the corresponding mild equation which is equivalent to being a generalized solution to the PDE. A further main result is the generalization of the martingale representation theorem in infinite dimension using the stochastic calculus associated to the generalized Dirichlet form given by L. The non-linear term f satisfies a monotonicity condition with respect to u and a Lipschitz condition with respect to ∇u.

Funding source: 973 project, NSFC, key Lab of CAS, the DFG through IRTG 1132 and CRC 701

I would like to thank Professor Michael Röckner for valuable discussions and for suggesting associate BSDE's to generalized Dirichlet forms which was one motivation for this paper. I would also like to thank Professor Ma Zhiming and Zhu Xiangchan for their helpful discussions.

Received: 2012-1-13
Revised: 2012-6-20
Published Online: 2012-8-23
Published in Print: 2015-1-1

© 2015 by De Gruyter

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