Approximation equations 2 Iterative methods 2 Maximum absolute error 2 Number of iterations 2 Numerical methods 2 Partial differential equations 2 SOR iterative method Successive over relaxation 2 Diffusion equations 1 Discretization scheme 1 Finite difference method 1 Fractional derivative operator 1 Implicit finite-difference schemes 1 Numerical experiments 1 Numerical solution 1