Tangential frequency filtering decompositions for unsymmetric matrices
type: Item
instance of: scholarly article
title: Tangential frequency filtering decompositions for unsymmetric matrices
zbMATH Open document ID: 0890.65031
author: Christian Wagner
published in: Numerische Mathematik
publication date: 1997-12-10T00:00:00Z
review text: This paper is a generalization for nonsymmetric matrices of the tangential frequency filtering decomposition (TFFD) of a symmetric matrix considered by the author in Numer. Math. 78, No. 1, 119-142 (1997; reviewed above). Existence of TFFD and convergence rates of the induced iterative algorithm are presented. The convergence rates of an iterative scheme which uses a sequence of TFFDs as preconditioners are independent of the number of unknowns for a certain class of nonsymmetric matrices. Numerical experiments with linear systems arising from the discretization of convection-diffusion equations are presented.
Mathematics Subject Classification ID: 65F10
Mathematics Subject Classification ID: 35J15
Mathematics Subject Classification ID: 65N06
zbMATH DE Number: 1096037
zbMATH Keywords: iterative methods for linear systems
zbMATH Keywords: preconditioner
zbMATH Keywords: tangential frequency filtering decompositions
zbMATH Keywords: nonsymmetric matrices
zbMATH Keywords: convergence
zbMATH Keywords: numerical experiments
zbMATH Keywords: convection-diffusion equations
reviewed by: W. Gander
MaRDI profile type: Publication
full work available at URL: s002110050308
OpenAlex ID: W2092069198
DOI: 10.1007/S002110050308
description: scientific article; zbMATH DE number 1096037