[Octave-bug-tracker] [bug #43551] Matlab incompatibility for gamma function for negative integer arguments

[Rik]

Follow-up Comment #7, bug #43551 (project octave):

The value is undefined at negative integer values in the same way that 1/0 is
undefined.

lim    1/x == -Inf
x->0-

lim
x->0+  1/x == +Inf

The magnitude is infinite, but the phase can't be determined.  We could return
NaN in this case to be mathematically precise, but nobody bothers to.  This
suggests that we drop mathematical correctness and just go with the rest of
the crowd.

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