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[Octave-bug-tracker] [bug #39573] Wrong result from eigs in generalized


From: Marco Caliari
Subject: [Octave-bug-tracker] [bug #39573] Wrong result from eigs in generalized shift-invert mode
Date: Tue, 17 Sep 2013 07:59:48 +0000
User-agent: Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0

Follow-up Comment #3, bug #39573 (project octave):

You are right, documentation requires positive semi-definite matrices but
ARPACK performs quite badly.
For instance, matlab gives "error -9999 in dsaupd" with your example and the
same would give Octave with the modification you suggested.

Marco

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