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Preconditioners for regularized saddle point matrices
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SYSNO ASEP 0361645 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Preconditioners for regularized saddle point matrices Author(s) Axelsson, Owe (UGN-S) RID Number of authors 1 Source Title Journal of Numerical Mathematics. - : Walter de Gruyter - ISSN 1570-2820
Roč. 19, č. 2 (2011), s. 91-112Number of pages 23 s. Publication form www - www Language eng - English Country DE - Germany Keywords saddle point matrices ; preconditioning ; regularization ; eigenvalue clustering Subject RIV BA - General Mathematics CEZ AV0Z30860518 - UGN-S (2005-2011) UT WOS 000292773100001 DOI 10.1515/JNUM.2011.005 Annotation Saddle point problems with singular or indefinite pivot blockmatrix arise in various applications. In some problems it may be necessary to regularize the corresponding matrix is some way. By straightforward derivations it is shown that use of certain preconditioners on block diagonal and block triangular form can be very efficient, both for the original matrix and for its regularized forms. As the value of regularization parameter increases, the eigenvalues cluster at unity or at just two points on the real line. Workplace Institute of Geonics Contact Lucie Gurková, lucie.gurkova@ugn.cas.cz, Tel.: 596 979 354 Year of Publishing 2012 Electronic address http://www.degruyter.com/view/j/jnma.2011.19.issue-2/jnum.2011.005/jnum.2011.005.xml
Number of the records: 1