Iterative methods 5 Partial differential equations 5 Successive over relaxation Approximation equations 4 Number of iterations 4 Numerical methods 4 Maximum absolute error 3 Numerical experiments 3 Finite difference method 2 Finite-difference solution 2 Fractional derivative operator 2 Implicit finite-difference schemes 2 Parabolic Equations 2 SOR iterative method 2 Derivative operators 1 Diffusion equations 1 Discretization scheme 1 Finite-difference discretization 1 Gauss-Seidel 1 Implicit difference schemes 1 Implicit solutions 1 Linear time 1 Numerical results 1 Numerical solution 1