Compact Alternating Direction Implicit Scheme for Integro-Differential Equations of Parabolic Type

In this paper, we present a fast and efficient numerical method to solve a class of parabolic integro-differential equations with weakly singular kernels, compact difference approach for spatial discretization and alternating direction implicit method in time, combined with second-order fractional quadrature rule suggested by Lubich approximating the integral term. The L2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$L^2$$\end{document} stability and convergence are derived. Two numerical examples with known exact solution are given to support the theoretical results.