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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: Mon, 05 Aug 2013 12:15:06 +0000
User-agent: Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0

Follow-up Comment #1, bug #39573 (project octave):

Hi,

your example is not correct, since B is not positive definite. On the other
hand, I think you are right and line 1275 (and 2238 and 3259) of eigs-base.cc
should be changed to


vector_product (b, workd+iptr(0)-1, dtmp);


as for the case ido == 2.

Marco

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