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Low-rank update of preconditioners for the nonlinear Richard's equation

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Low-rank update of preconditioners for the nonlinear Richard's equation

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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


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