Stability and error analysis of an implicit Milstein finite difference scheme for a two-dimensional Zakai SPDE
classification
🧮 math.NA
keywords
implicitschemeanalysisdifferencefinitemilsteinorderspde
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In this article, we propose an implicit finite difference scheme for a two-dimensional parabolic stochastic partial differential equation (SPDE) of Zakai type. The scheme is based on a Milstein approximation to the stochastic integral and an alternating direction implicit (ADI) discretisation of the elliptic term. We prove its mean-square stability and convergence in L2 of first order in time and second order in space, by Fourier analysis, in the presence of Dirac initial data. Numerical tests confirm these findings empirically.
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