The Mathematical Institute, University of Oxford, Eprints Archive

The antitriangular factorisation of saddle point matrices

Pestana, Jennifer and Wathen, A. J. (2013) The antitriangular factorisation of saddle point matrices. Technical Report. Unspecified. (Submitted)

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Abstract

Mastronardi and Van Dooren recently introduced the block antitriangular ("Batman") decomposition for symmetric indefinite matrices. Here we show the simplification of this factorisation for saddle point matrices and demonstrate how it represents the common nullspace method. We show the relation of this factorisation to constraint preconditioning and how it transforms but preserves the block diagonal structure of block diagonal preconditioning.

Item Type:Technical Report (Technical Report)
Subjects:H - N > Numerical analysis
Research Groups:Numerical Analysis Group
ID Code:1753
Deposited By: Lotti Ekert
Deposited On:10 Oct 2013 08:07
Last Modified:29 May 2015 19:27

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