Fast time-stepping discontinuous Galerkin method for the subdiffusion equation
Fast time-stepping discontinuous Galerkin method for the subdiffusion equation
Abstract The nonlocality of the fractional operator causes numerical difficulties for long time computation for time-fractional evolution equations. This paper develops a high-order fast time-stepping discontinuous Galerkin (DG) finite element method for a time-fractional diffusion equation, which saves storage and computational time. An optimal error estimate of the form $O(N^{-p-1} …