Preconditioning of discrete Helmholtz operators perturbed by a diagonal complex matrix

DOI<801::AID-CNM377>3.0.CO;2-M 10.1002/1099-0887(200011)16:11<801::AID-CNM377>3.0.CO;2-MzbMath0972.65031OpenAlexW1981883552MaRDI QIDQ2704606

Guy Warzée, Robert Beauwens, Mardochée Magolu monga Made

Publication date: 19 November 2001

Full work available at URL: https://doi.org/10.1002/1099-0887(200011)16:11<801::aid-cnm377>3.0.co;2-m

zbMATH Keywords

preconditioningnumerical testsHelmholtz equationKrylov subspace methodlarge and sparse linear systemsclustering of eigenvaluesincomplete Cholesky factorizations

Mathematics Subject Classification ID

Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs (65N30) Iterative numerical methods for linear systems (65F10) Numerical computation of matrix norms, conditioning, scaling (65F35) Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation (35J05)

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