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dc.contributor.author | Bergamaschi, Luca | es_ES |
dc.contributor.author | Bru García, Rafael | es_ES |
dc.contributor.author | Martínez Calomardo, Ángeles | es_ES |
dc.contributor.author | Mas Marí, José | es_ES |
dc.contributor.author | Putti, Mario | es_ES |
dc.date.accessioned | 2015-09-15T14:23:12Z | |
dc.date.available | 2015-09-15T14:23:12Z | |
dc.date.issued | 2013-01-09 | |
dc.identifier.issn | 0895-7177 | |
dc.identifier.uri | http://hdl.handle.net/10251/54660 | |
dc.description.abstract | Preconditioners for the Conjugate Gradient method are studied to solve the Newton system with symmetric positive definite (SPD) Jacobian. Following the theoretical work in Bergamaschi et al. (2011) [4] we start from a given approximation of the inverse of the initial Jacobian, and we construct a sequence of preconditioners by means of a low rank update, for the linearized systems arising in the Picard Newton solution of the nonlinear discretized Richards equation. Numerical results onto a very large and realistic test case show that the proposed approach is more efficient, in terms of iteration number and CPU time, as compared to computing the preconditioner of choice at every nonlinear iteration. | es_ES |
dc.description.sponsorship | The support of the CARIPARO Foundation (Grant NPDE: Non-linear Partial Differential Equations: models, analysis, and control - theoretic problems), and of the Spanish DGI grant MTM2010-18674 is acknowledged. | en_EN |
dc.language | Inglés | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation.ispartof | Mathematical and Computer Modelling | es_ES |
dc.rights | Reserva de todos los derechos | es_ES |
dc.subject | Quasi-Newton method | es_ES |
dc.subject | Krylov iterations | es_ES |
dc.subject | Updating preconditioners | es_ES |
dc.subject | Inexact Newton method | es_ES |
dc.subject.classification | MATEMATICA APLICADA | es_ES |
dc.title | Low-rank update of preconditioners for the nonlinear Richard's equation | es_ES |
dc.type | Artículo | es_ES |
dc.identifier.doi | 10.1016/j.mcm.2012.01.013 | |
dc.relation.projectID | info:eu-repo/grantAgreement/MICINN//MTM2010-18674/ES/SOLUCION ITERATIVA DE SISTEMAS LINEALES Y APLICACIONES/ | es_ES |
dc.rights.accessRights | Abierto | es_ES |
dc.contributor.affiliation | Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada | es_ES |
dc.description.bibliographicCitation | Bergamaschi, L.; Bru García, R.; Martínez Calomardo, Á.; Mas Marí, J.; Putti, M. (2013). Low-rank update of preconditioners for the nonlinear Richard's equation. Mathematical and Computer Modelling. 57(7):1933-1941. https://doi.org/10.1016/j.mcm.2012.01.013 | es_ES |
dc.description.accrualMethod | S | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.mcm.2012.01.013 | es_ES |
dc.description.upvformatpinicio | 1933 | es_ES |
dc.description.upvformatpfin | 1941 | es_ES |
dc.type.version | info:eu-repo/semantics/publishedVersion | es_ES |
dc.description.volume | 57 | es_ES |
dc.description.issue | 7 | es_ES |
dc.relation.senia | 256829 | es_ES |
dc.contributor.funder | Ministerio de Ciencia e Innovación | es_ES |
dc.contributor.funder | Fondazione Cassa di Risparmio di Padova e Rovigo | es_ES |