Fourier pseudo-spectral method for the extended Fisher-Kolmogorov equation in two dimensions

Abstract

Abstract In the study of pattern formation in bi-stable systems, the extended Fisher-Kolmogorov (EFK) equation plays an important role. In this paper, a Fourier pseudo-spectral method for solving the EFK equation in two space dimensions is presented. Prior bounds are proved using Lyapunov function. Further, optimal error estimates are established for the semi-discrete scheme. Finally, a fully discrete scheme based on Crank-Nicolson method is proposed, and related optimal error estimates are derived and some numerical experiments are presented.

Keywords

• extended Fisher-Kolmogorov equation
• Fourier pseudo-spectral method
• stability
• convergence
• error estimate