MA57 - A new code for the solution of sparse symmetric definite and indefinite systems

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Record Id	29527
Title	MA57 - A new code for the solution of sparse symmetric definite and indefinite systems
Contributors	I S Duff
Abstract	We introduce a new code for the direct solution of sparse symmetric linear equations that solves indefinite systems with 2x2 pivoting for stability. This code, called MA57, is in HSL 2002 and supersedes the well used HSL code MA27. We describe the user interface in some detail and emphasize some of the novel features of MA57. These include restart facilities, matrix modification, partial solution for matrix factors, solution of multiple right-hand sides, and iterative refinement and error analysis. There are additional facilities within a Fortran 90 implementation that include the ability to identify and change pivots. Several of these facilities have been developed particularly to support optimization applications and the performance of the code on problems arising therefrom will be presented.
Organisation	CCLRC
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Language	English (EN)

Type	Details	URI(s)	Local file(s)	Year
Report	RAL Technical Reports RAL-TR-2002-024. 2002.		raltr-2002024.pdf	2002