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Fully-discrete finite element approximationsfora fourth-order linear stochastic parabolic equationwith additive space-time white noise

Published online by Cambridge University Press:  27 January 2010

Georgios T. Kossioris
Affiliation:
Department of Mathematics, University of Crete, 714 09 Heraklion, Crete, Greece and Institute of Applied and Computational Mathematics, FO.R.T.H., 711 10 Heraklion, Crete, Greece. kosioris@math.uoc.gr; zouraris@math.uoc.gr
Georgios E. Zouraris
Affiliation:
Department of Mathematics, University of Crete, 714 09 Heraklion, Crete, Greece and Institute of Applied and Computational Mathematics, FO.R.T.H., 711 10 Heraklion, Crete, Greece. kosioris@math.uoc.gr; zouraris@math.uoc.gr
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Abstract

We consider an initial and Dirichlet boundary value problem fora fourth-order linear stochastic parabolic equation, in one spacedimension, forced by an additive space-time white noise.Discretizing the space-time white noise a modelling error isintroduced and a regularized fourth-order linear stochasticparabolic problem is obtained. Fully-discrete approximations to the solution of the regularizedproblem are constructed by using, for discretization in space, aGalerkin finite element method based on C0 or C1piecewise polynomials, and, for time-stepping, the Backward Eulermethod.We derive strong a priori estimates for the modelling error and forthe approximation error to the solution of the regularizedproblem.

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Type
Research Article
Copyright
© EDP Sciences, SMAI, 2010

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