2019/03/14 by Matteo Beccari, Beccari, Matteo, Martin Hutzenthaler +9
Economics, Econometrics and Finance · Engineering · #60H15 #60H35 #65C30 #FOS: Mathematics #Fluid Dynamics and Turbulent Flows #Numerical Analysis (math.NA) #Probability (math.PR) #Stochastic processes and financial applications
paper · pdf · doi:10.48550/arxiv.1903.06066
openalex publication_date 2019/03/14 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The explicit Euler scheme and similar explicit approximation schemes (such as\nthe Milstein scheme) are known to diverge strongly and numerically weakly in\nthe case of one-dimensional stochastic ordinary differential equations with\nsuperlinearly growing nonlinearities. It remained an open question whether such\na divergence phenomenon also holds in the case of stochastic partial\ndifferential equations with superlinearly growing nonlinearities such as\nstochastic Allen-Cahn equations. In this work we solve this problem by proving\nthat full-discrete exponential Euler and full-discrete linear-implicit Euler\napproximations diverge strongly and numerically weakly in the case of\nstochastic Allen-Cahn equations. This article also contains a short literature\noverview on existing numerical approximation results for stochastic\ndifferential equations with superlinearly growing nonlinearities.\n