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Persistent URL
http://purl.org/net/epubs/work/40502
Record Status
Checked
Record Id
40502
Title
Implementing Hager's exchange methods for matrix profile reduction
Contributors
J K Reid
,
J A Scott
Abstract
Hager recently introduced down and up exchange methods for reducing the profile of a sparse matrix with a symmetric sparsity pattern. The methods are particularly useful for refining orderings that have been obtained using a standard profile reduction algorithm, such as the Sloan method. The running times for the exchange algorithms reported by Hager suggested their cost could be prohibitive for practical applications. We examine how to implement the exchange algorithms efficiently. For a range real test problems, it is shown that the cost of running our new implementation does not add a prohibitive overhead to the cost of the original reordering.
Organisation
CCLRC
,
CSE
,
CSE-NAG
Keywords
Funding Information
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Language
English (EN)
Type
Details
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Year
Journal Article
ACM Trans Math Software
28 (2002): 1-15.
doi:10.1145/592843.592844
raltr-2001039.pdf
2002
Report
RAL Technical Reports
RAL-TR-2001-039 . 2001.
2001
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