An additive subspace preconditioning method for the iterative solution of some problems with extreme contrasts in coefficients

O. Axelsson

doi:10.1515/jnma-2014-0013

Published by De Gruyter November 25, 2014

An additive subspace preconditioning method for the iterative solution of some problems with extreme contrasts in coefficients

O. Axelsson

From the journal Journal of Numerical Mathematics

https://doi.org/10.1515/jnma-2014-0013

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Abstract

-By use of an additive subspace preconditioning method it is shown how a set of small eigenvalues of a given system operator can be moved to the upper part of the spectrum, thereby significantly improving the spectral condition number and the rate of convergence of the iterative solution method used for the corresponding preconditioned system.

Keywords: preconditioning; additive subspace; small eigenvalues

Received: 2013-5-9

Published Online: 2014-11-25

Published in Print: 2014-12-1

An additive subspace preconditioning method for the iterative solution of some problems with extreme contrasts in coefficients

Abstract

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