Feynman-Kac Formula for the Heat Equation Driven by fractional Noise with Hurst parameter $H<1/2$

Details Feynman-Kac Formula for the Heat Equation Driven by fractional Noise with Hurst parameter $H<1/2$ Feynman-Kac Formula for the Heat Equation Driven by fractional Noise with Hurst parameter $H<1/2$

2010-07-30

arxiv.org/abs/1007.5507v1

Mathematics

Probability

Scientific paper

In this paper a Feynman-Kac formula is established for stochastic partial differential equation driven by Gaussian noise which is, with respect to time, a fractional Brownian motion with Hurst parameter $H<1/2$. To establish such a formula we introduce and study a nonlinear stochastic integral from the given Gaussian noise. To show the Feynman-Kac integral exists, one still needs to show the exponential integrability of nonlinear stochastic integral. Then, the approach of approximation with techniques from Malliavin calculus is used to show that the Feynman-Kac integral is the weak solution to the stochastic partial differential equation.

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