[Octave-bug-tracker] [bug #62972] 2D integrals conjugate complex numbers

[INVALID.NOREPLY]

URL:
  <https://savannah.gnu.org/bugs/?62972>

                 Summary: 2D integrals conjugate complex numbers
                 Project: GNU Octave
               Submitter: oshbug
               Submitted: Sun 28 Aug 2022 03:00:41 PM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 7.2.0
         Discussion Lock: Any
        Operating System: GNU/Linux


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Follow-up Comments:


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Date: Sun 28 Aug 2022 03:00:41 PM UTC By: Anonymous
Both of


quad2d(@(x,y) i, 0,1,0,1)
integral2(@(x,y) i, 0,1,0,1)


give the answer to this integral as 0-1i, but clearly it is 0+1i. This is
confirmed by Wolfram Alpha:
https://www.wolframalpha.com/input?i=Integrate+i+dx+dy+from+x%3D0+to+x%3D1+and+y%3D0+to+y%3D1

Generally, it seems that both these functions correctly integrate functions
with complex outputs, but then return the complex conjugate of the correct
answer. E.g. if the answer should be 1+i, they return 1-i.







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