Multigrid algorithms for a vertex-centered covolume method for elliptic problems

We analyze V –cycle multigrid algorithms for a class of perturbed problems whose perturbation in the bilinear form preserves the convergence properties of themultigrid algorithm of the original problem.As an application, we study the convergence of multigrid algorithms for a covolumemethod or a vertex–centered finite volume element method for variable coefficient elliptic problems on polygonal domains. As in standard finite element methods, the V –cycle algorithm with one pre-smoothing converges with a rate independent of the number of levels. Various types of smoothers including point or line Jacobi, and Gauss-Seidel relaxation are considered.