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A technique for accelerating the convergence of restarted gmres

  • Lawrence Livermore National Laboratory
  • University of Colorado Boulder

Research output: Contribution to journal › Article › peer-review

187 Scopus citations

Abstract

We have observed that the residual vectors at the end of each restart cycle of restarted GMRES often alternate direction in a cyclic fashion, thereby slowing convergence. We present a new technique for accelerating the convergence of restarted GMRES by disrupting this alternating pattern. The new algorithm resembles a full conjugate gradient method with polynomial preconditioning, and its implementation requires minimal changes to the standard restarted GMRES algorithm.

Original languageEnglish
Pages (from-to)962-984
Number of pages23
JournalSIAM Journal on Matrix Analysis and Applications
Volume26
Issue number4
DOIs
StatePublished - 2005
Externally publishedYes

Keywords

  • GMRES
  • Iterative methods
  • Krylov subspace
  • Nonsymmetric linear systems
  • Restart

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