Stability and error analysis of an implicit Milstein finite difference scheme for a two-dimensional Zakai SPDE

• Main Authors: Reisinger, Christoph, Wang, Zhenru
• Format: Journal Article
• Language: English
• Published: 21-02-2018
• Subjects: Mathematics - Numerical Analysis
• DOI: 10.48550/arxiv.1802.07682

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.