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Structured backward errors for KKT systems
Umeå University, Faculty of Science and Technology, Departement of Computing Science.
1999 (English)In: Linear Algebra and Its Applications, Vol. 288, no 1-3, 75-88 p.Article in journal (Refereed) Published
Abstract [en]

Karush-Kuhn-Tucker (KKT) systems are linear systems with coefficient matrices of the form [GRAPHICS] where H is symmetric. A normwise structured backward error for KKT systems is defined, and a computable formula of the structured backward error is obtained. Simple examples show that the structured backward error may be arbitrarily larger than the unstructured ones in the worst case, and a stable algorithm for solving KKT systems is not necessarily strongly stable. Consequently, the computable formula of the structured backward error may be useful for testing the strong stability of practical algorithms for solving KKT systems. (C) 1999 Elsevier Science Inc. All rights reserved.

Place, publisher, year, edition, pages
1999. Vol. 288, no 1-3, 75-88 p.
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URN: urn:nbn:se:umu:diva-22011ISBN: 0024-3795 OAI: oai:DiVA.org:umu-22011DiVA: diva2:212274
Available from: 2009-04-21 Created: 2009-04-21 Last updated: 2009-04-21

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CiteExportLink to record
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