For the discretized linear systems of spatial fractional diffusion equations, we construct a class modified DTS iteration method and give its asymptotic convergence conditions. Then, design fast preconditioner by replacing Toeplitz matrix T with τ to accelerate rates GMRES method. Theoretically, show that spectrum preconditioned is clustered around one. Numerical experiments verify validity con...

this paper presents a comparison between variational iteration method (vim) and modfied variational iteration method (mvim) for approximate solution a system of volterra integral equation of the first kind. we convert a system of volterra integral equations to a system of volterra integro-di®erential equations that use vim and mvim to approximate solution of this system and hence obtain an appr...