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[Octave-bug-tracker] [bug #45153] eigs returning an incorrrect number of


From: Marco Caliari
Subject: [Octave-bug-tracker] [bug #45153] eigs returning an incorrrect number of eigenvalues
Date: Fri, 17 Mar 2017 11:11:31 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0

Update of bug #45153 (project octave):

              Item Group:       Inaccurate Result => Incorrect Result       
                  Status:               Duplicate => Confirmed              
                 Release:                   3.8.1 => 4.2.1                  

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Follow-up Comment #2:

For real problems, ARPACK always gives back the possible conjugate pairs.
Therefore, it may happen that it gives back one additional eigenvalue. In this
case, if the output is 17 eigenvalues, we should keep the 16 with smallest
magnitute 'sm'. I think it is possible to use the select subfunction already
in eigs.m. Comments?

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Reply to this item at:

  <http://savannah.gnu.org/bugs/?45153>

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