[Octave-bug-tracker] [bug #64348] qp (quadratic programming) error code 1 should never happen?

[Julien Bect]

URL:
  <https://savannah.gnu.org/bugs/?64348>

                 Summary: qp (quadratic programming) error code 1 should never
happen?
                   Group: GNU Octave
               Submitter: jbect
               Submitted: lun. 26 juin 2023 08:11:59
                Category: Documentation
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Documentation
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: stable
         Discussion Lock: Any
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: lun. 26 juin 2023 08:11:59     By: Julien Bect <jbect>
Error code 1 in qp corresponds to the case where the internal function __qp__
fails with error code 1, indicating a non-convex problem for which a local
solution has been found.

However, it turns out that __qp__ is not even called for a non-convex program
(H not positive definite), since qp would fail first with error code 2.

This issue is probably related to the recent introduction of the 'isdefinite'
check (https://hg.savannah.gnu.org/hgweb/octave/rev/2f1fae9dd79d), which
changed the meaning of error code 2.

Related doc issue: https://savannah.gnu.org/bugs/?64347







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