Two-Level Least Squares Methods in Krylov Subspaces

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Two-level least squares acceleration approaches are applied to the Chebyshev acceleration method and the restarted conjugate residual method in solving systems of linear algebraic equations with sparse unsymmetric coefficient matrices arising from finite volume or finite element approximations of boundary-value problems on irregular grids. Application of the proposed idea to other iterative restarted processes also is considered. The efficiency of the algorithms suggested is investigated numerically on a set of model Dirichlet problems for the convection-diffusion equation.

Original languageEnglish
Pages (from-to)892-902
Number of pages11
JournalJournal of Mathematical Sciences (United States)
Issue number6
Publication statusPublished - 1 Aug 2018


Dive into the research topics of 'Two-Level Least Squares Methods in Krylov Subspaces'. Together they form a unique fingerprint.

Cite this