In this paper, we analyze the spectra of the preconditioned matrices arising from discretized
multi-dimensional Riesz spatial fractional diffusion equations. The finite difference method is …

Recently, the class of Generalized Locally Toeplitz (GLT) sequences has been introduced
as a generalization both of classical Toeplitz sequences and of variable coefficient …

We consider the stiffness matrices arising from the Galerkin B-spline isogeometric analysis
discretization of classical elliptic problems. By exploiting their specific spectral properties …

In this paper we are interested in the solution by multigrid strategies of multilevel linear
systems whose coefficient matrices belong to the circulant, Hartley, or τ algebras or to the …

This survey paper deals with the use of antireflective boundary conditions for deblurring
problems where the issues that we consider are the precision of the reconstruction when the …

It is well known that the discretization of fractional diffusion equations with fractional
derivatives α∈(1, 2) α ∈\left (1, 2\right), using the so‐called weighted and shifted Grünwald …

Abstract The incompressible Navier–Stokes equations are solved in a channel, using a
Discontinuous Galerkin method over staggered grids. We study the structure and the …

In the present article we consider a type of matrices stemming in the context of the numerical
approximation of distributed order fractional differential equations (FDEs). From one side …

In this note, we study the fast solution of Toeplitz linear systems with coefficient matrix T n (f),
where the generating function f is nonnegative and has a unique zero at zero of any real …

Starting from the spectral analysis of g-circulant matrices, we study the convergence of a
multigrid method for circulant and Toeplitz matrices with various size reductions. We assume …