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Smoothing properties of nonlinear stochastic equations in Hilbert spaces

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Abstract

A nonlinear stochastic equation in a Hilbert space is considered, with constant but possibly degenerate diffusion term. Some smoothing properties for the associated transition semigroup are studied. In particular, strong Feller property and irreducibility are proved. The main tools are Malliavin calculus and Girsanov transformation.

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Partially supported by Italian MURST 60% research funds.

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Fuhrman, M. Smoothing properties of nonlinear stochastic equations in Hilbert spaces. NoDEA 3, 445–464 (1996). https://doi.org/10.1007/BF01193830

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