[Octave-bug-tracker] [bug #53527] When should octave recognize a matrix as Hermitian?

[Marco Caliari]

URL:
  <http://savannah.gnu.org/bugs/?53527>

                 Summary: When should octave recognize a matrix as Hermitian?
                 Project: GNU Octave
            Submitted by: caliari
            Submitted on: Fri 30 Mar 2018 04:46:21 PM UTC
                Category: Performance
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Performance
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: GNU/Linux

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Details:

In the discussion of bug #53499, it came out that when solving a linear system
with a matrix A which is not exactly symmetric (but issymmetric(A,eps) is
true), octave uses a general method (it was umfpack in that case, since the
matrix was sparse. I do not know what happens in the full case). The result
was a computational time three times larger than necessary. I opened this bug
report to start the discussion.




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