Path-dependent Hamilton-Jacobi-Bellman equation: Uniqueness of Crandall-Lions viscosity solutions
arXiv (Cornell University)(2021)
Abstract
We formulate a path-dependent stochastic optimal control problem under general conditions, for which weprove rigorously the dynamic programming principle and that the value function is the unique Crandall-Lions viscosity solution of the corresponding Hamilton-Jacobi-Bellman equation. Compared to the literature, the proof of our core result, that is the comparison theorem, is based on the fact that the valuefunction is bigger than any viscosity subsolution and smaller than any viscosity supersolution. It alsorelies on the approximation of the value function in terms of functions defined on finite-dimensionalspaces as well as on regularity results for parabolic partial differential equations.
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Key words
path-dependent,hamilton-jacobi-bellman,crandall-lions
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