code to update LDL' matrix factorizations

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#1172

From: David H. West
Date: Fri, 21 Apr 1989 16:39

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Can anyone give me pointers to the source code of the Harwell
routine MC11A (up/down-date LDL' matrix factorizations, by Fletcher and
Powell) or equivalent?

Is the Harwell library available by FTP or mailserver?

(The 'usual' case is straightforward to code from their paper, but the 
case of enforced rank change is tricky.)

Thanks in advance,

-David West            dhw@itivax.iti.org
		       {uunet,rutgers,ames}!sharkey!itivax!dhw
COMPIS, Industrial Technology Institute, PO Box 1485, 
Ann Arbor, MI 48106

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!sharkey!itivax!dhw
From: dhw@itivax.iti.org (David H. West)
Newsgroups: sci.math.num-analysis,comp.sources.wanted
Subject: code to update LDL' matrix factorizations
Keywords: MC11A Harwell Fletcher Powell LDL'
Message-ID: <1002@itivax.iti.org>
Date: 21 Apr 89 16:39:54 GMT
Followup-To: poster
Organization: The Forgotten Legions of ... um ... er ...
Lines: 15