A class of incomplete orthogonal factorization methods 2: implementation and results

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Persistent URL	http://purl.org/net/epubs/work/29524
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Record Id	29524
Title	A class of incomplete orthogonal factorization methods 2: implementation and results
Contributors	A T Papadopoulos, I S Duff, A J Wathen
Abstract	We present, implement and test several incomplete orthogonal factorization methods based on Givens rotation for large sparse unsymmetric square and rectangular matrices. The methods are applied to a variety of square systems and their performance as preconditioners is tested against standard incomplete LU factorization techniques. For rectangular matrices corresponding to least squares problems, the resulting incomplete factorizations are applied as preconditioners for conjugate gradients for the system of normal equations. A comprehensive discussion about the uses, advantages and shortcomings of these preconditioners is given.
Organisation	CCLRC
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Report	RAL Technical Reports RAL-TR-2002-019. 2002.		raltr-2002019.pdf	2002