A Class of Second Order Difference Approximation for Solving Space Fractional Diffusion Equations

Details A Class of Second Order Difference Approximation for Solving Space Fractional Diffusion Equations A Class of Second Order Difference Approximation for Solving Space Fractional Diffusion Equations

2012-01-28

arxiv.org/abs/1201.5949v3

Mathematics

Numerical Analysis

24 Pages

Scientific paper

A class of second order approximations, called the weighted and shifted Gr\"{u}nwald difference operators, are proposed for Riemann-Liouville fractional derivatives, with their effective applications to numerically solving space fractional diffusion equations in one and two dimensions. The stability and convergence of our difference schemes for space fractional diffusion equations with constant coefficients in one and two dimensions are theoretically established. Several numerical examples are implemented to testify the efficiency of the numerical schemes and confirm the convergence order, and the numerical results for variable coefficients problem are also presented.

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