[issue37893] pow() should disallow inverse when modulus is +-1
Tim Peters
report at bugs.python.org
Tue Aug 20 13:38:19 EDT 2019
Tim Peters <tim at python.org> added the comment:
Yup, you have a point there! :-) I guess I'm just not used to 0 being a multiplicative identity.
Don't know what other systems do. Playing with Maxima, modulo 1 it seems to think 0 is the inverse of everything _except_ for 0. `inv_mod(0, 1)` returns `false`. Modulo -1, everything I tried returned `false`.
Which makes less sense to me.
Fine by me if you want to close this as "not a bug".
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