Mathematics – Analysis of PDEs
Scientific paper
2011-09-27
Mathematics
Analysis of PDEs
34 pages
Scientific paper
In this paper we propose a notion of viscosity solutions for path dependent semi-linear parabolic PDEs. This can also be viewed as viscosity solutions of non-Markovian Backward SDEs, and thus extends the well known nonlinear Feynman-Kac formula to non-Markovian case. We shall prove the existence, uniqueness, stability, and comparison principle for the viscosity solutions. The key ingredient of our approach is a functional It\^{o}'s calculus recently introduced by Dupire \cite{Dupire}.
Ekren Ibrahim
Keller Christian
Touzi Nizar
Zhang Jianfeng
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