dc.contributor.author
Ayuso de Dios, B.
dc.contributor.author
Barker, A.T.
dc.contributor.author
Vassilevski, P.S.
dc.date.accessioned
2020-10-13T12:17:41Z
dc.date.accessioned
2024-09-19T13:17:35Z
dc.date.available
2020-10-13T12:17:41Z
dc.date.available
2024-09-19T13:17:35Z
dc.date.issued
2012-01-01
dc.identifier.uri
http://hdl.handle.net/2072/377514
dc.description.abstract
We present and analyze a class of nonsymmetric preconditioners within a normal (weighted least-squares) matrix form for use in GMRES to solve nonsymmetric matrix problems that typically arise in finite element discretizations. An example of the additive Schwarz method applied to nonsymmetric but definite matrices is presented for which the abstract assumptions are verified. A variable preconditioner, combining the original nonsymmetric one and a weighted least-squares version of it, is shown to be convergent and provides a viable strategy for using nonsymmetric preconditioners in practice. Numerical results are included to assess the theory and the performance of the proposed preconditioners.
dc.format.extent
20 p.
cat
dc.rights
L'accés als continguts d'aquest document queda condicionat a l'acceptació de les condicions d'ús establertes per la següent llicència Creative Commons:http://creativecommons.org/licenses/by-nc-nd/4.0/
dc.source
RECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.other
Matemàtiques
cat
dc.title
A COMBINED PRECONDITIONING STRATEGY FOR NONSYMMETRIC SYSTEMS
cat
dc.type
info:eu-repo/semantics/preprint
cat
dc.rights.accessLevel
info:eu-repo/semantics/openAccess
