On Malliavin's differentiability of BSDEs with time delayed generators driven by Brownian motions and Poisson random measures

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Abstract

We investigate solutions of backward stochastic differential equations (BSDEs) with time delayed generators driven by Brownian motions and Poisson random measures, that constitute the two components of a Lévy process. In these new types of equations, the generator can depend on the past values of a solution, by feeding them back into the dynamics with a time lag. For such time delayed BSDEs, we prove the existence and uniqueness of solutions provided we restrict on a sufficiently small time horizon or the generator possesses a sufficiently small Lipschitz constant. We study differentiability in the variational or Malliavin sense and derive equations that are satisfied by the Malliavin gradient processes. On the chosen stochastic basis this addresses smoothness both with respect to the continuous part of our Lévy process in terms of the classical Malliavin derivative for Hilbert space valued random variables, as well as with respect to the pure jump component for which it takes the form of an increment quotient operator related to the Picard difference operator. © 2010 Elsevier B.V. All rights reserved.

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Delong, Ł., & Imkeller, P. (2010). On Malliavin’s differentiability of BSDEs with time delayed generators driven by Brownian motions and Poisson random measures. Stochastic Processes and Their Applications, 120(9), 1748–1775. https://doi.org/10.1016/j.spa.2010.05.001

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