[Octave-bug-tracker] [bug #49690] inv(inf) behaves differently from inf^-1, 1/inf, inf\1

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?49690>

                 Summary: inv(inf) behaves differently from inf^-1, 1/inf,
inf\1
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Thu 24 Nov 2016 08:06:58 AM UTC
                Category: Octave Function
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: address@hidden
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.0.3
        Operating System: GNU/Linux

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Details:


octave:1>  inv(inf)
warning: matrix singular to machine precision
ans = Inf
octave:2>  inf^-1
ans = 0
octave:3>  inf\1
ans = 0
octave:4>  1/inf
ans = 0


I'm not sure whether this is a bug since "inf" is not a finite value, and I'm
not sure whether it is required that inv() should behave exactly as ()^-1 .
Also, I'm sorry that I have no Octave 4.2.0 installed so I could not help to
test this on the new released version.




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