Abstract
We prove an infinite dimensional integration by parts formula on the law of the modulus of the Brownian bridge \(BB=(BB_t)_{0 \le t \le 1}\) from 0 to 0 in use of methods from white noise analysis and Dirichlet form theory. Additionally to the usual drift term, this formula contains a distribution which is constructed in the space of Hida distributions by means of a Wick product with Donsker’s delta (which correlates with the local time of |BB| at zero). This additional distribution corresponds to the reflection at zero caused by the modulus.
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Financial support by the DFG through the project GR 1809/14-1 is gratefully acknowledged.
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Grothaus, M., Vosshall, R. Integration by parts on the law of the modulus of the Brownian bridge. Stoch PDE: Anal Comp 6, 335–363 (2018). https://doi.org/10.1007/s40072-018-0110-4
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DOI: https://doi.org/10.1007/s40072-018-0110-4
Keywords
- Reflected Brownian bridge
- Integration by parts formula in infinite dimensions
- Stochastic heat equation with reflection
- White noise analysis
- Dirichlet forms