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 Electronic Journal of Probability > Vol. 8 (2003) > Paper 12 open journal systems 


Large Deviation Principle for a Stochastic Heat Equation With Spatially Correlated Noise

David Marquez-carreras, Universitat de Barcelona
Monica Sarra, Universitat de Barcelona


Abstract
In this paper we prove a large deviation principle (ldp) for a perturbed stochastic heat equation defined on $[0,T]times [0,1]^d$. This equation is driven by a Gaussian noise, white in time and correlated in space. Firstly, we show the H"older continuity for the solution of the stochastic heat equation. Secondly, we check that our Gaussian process satisfies a ldp and some requirements on the skeleton of the solution. Finally, we prove the called Freidlin-Wentzell inequality. In order to obtain all these results we need precise estimates of the fundamental solution of this equation.


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Pages: 1-39

Published on: July 18, 2003


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Electronic Journal of Probability. ISSN: 1083-6489