Preconditioning by an extended matrix technique for convection-diffusion-reaction equations

Preconditioning by an extended matrix technique for convection-diffusion-reaction equations

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In this paper we consider a preconditioning technique for the ill-conditioned systems arising from discretisations of nonsymmetric elliptic boundary value problems. The rectangular preconditioning matrix is constructed via the transfer operators between successive discretization levels of the initia...

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Bibliographic Details
Main Authors: Aurelian Nicola, Constantin Popa
Format: Article
Language:English
Published: Publishing House of the Romanian Academy 2008-08-01
Series:Journal of Numerical Analysis and Approximation Theory
Subjects:
multilevel discretization
spectrally equivalent matrices
mesh independent preconditioning
positive semidefinite systems
CGLS algorithm
Online Access:https://www.ictp.acad.ro/jnaat/journal/article/view/890
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