Published In

IMA Journal of Numerical Analysis

Document Type

Post-Print

Publication Date

10-2013

Subjects

Multigrid methods (Numerical analysis), Galerkin methods, Discontinuous functions

Abstract

We analyze the convergence of a multigrid algorithm for the Hybridizable Discontinuous Galerkin (HDG) method for diffusion problems. We prove that a non-nested multigrid V-cycle, with a single smoothing step per level, converges at a mesh independent rate. Along the way, we study conditioning of the HDG method, prove new error estimates for it, and identify an abstract class of problems for which a nonnested two-level multigrid cycle with one smoothing step converges even when the prolongation norm is greater than one. Numerical experiments verifying our theoretical results are presented.

Description

This is an Author's Accepted Manuscript of an article published in IMA Journal of Numerical Analysis (2013) doi: 10.1093/imanum/drt024. © 2013 by Cambridge University Press.

The original publication is available at http://journals.cambridge.org

DOI

10.1093/imanum/drt024

Persistent Identifier

http://archives.pdx.edu/ds/psu/10594

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