From: bader-reinhold@t-online.de (Reinhold Bader)
To: gsl-discuss@sourceware.org
Cc: Brian Gough <bjg@network-theory.co.uk>
Subject: Documentation (2)
Date: Thu, 21 Aug 2008 19:40:00 -0000 [thread overview]
Message-ID: <48ADC452.30707@lrz.de> (raw)
Hello,
the routine gsl_linalg_QRPT_update appears to be also incorrectly documented;
in this case I think the comments in the source are also partially incorrect.
My own testing implies that the update formula is
Q'R' = Q ( R + w v^T ) P
and not Q'R' = Q R + w v^T, as the 1.10 manual presently says, or
Q'R' = Q ( R + w v^T P), as mentioned in the qrpt source file.
Regards
--
Dr. Reinhold Bader
Leibniz-Rechenzentrum, Abt. Hochleistungssysteme | Tel. +49 89 35831 8825
Boltzmannstr. 1, 85748 Garching | Fax +49 89 35831 9700
next prev reply other threads:[~2008-08-21 19:40 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-21 17:47 Documentation Reinhold Bader
2008-08-21 19:40 ` Reinhold Bader [this message]
2008-08-26 14:54 ` Documentation Brian Gough
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