[Octave-bug-tracker] [bug #56901] Bad bug in Matrices

[anonymous]

URL:
  <https://savannah.gnu.org/bugs/?56901>

                 Summary: Bad bug in Matrices
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Mon 16 Sep 2019 08:23:49 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: the dude
        Originator Email: swu022^gmail.com
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 5.1.0
        Operating System: Microsoft Windows

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Details:

Someone messed up the code!
The most basic calculations are way off.

For example "eye+[1,0;0,0]" gives "[1,2;1,1]" which is obviously not true.
(the same in 3x3...)

A similar thing is happening with the multiplication in at least in
diagonalizing e^A=P^(-1)e^(D)P were D is a 3x3 diagonal with d_{2,2}=0.

(The same is is happening in Linux)




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