Mark Dickinson <dicki...@gmail.com> added the comment: We follow C99 for this case, which says (C99 F 9.4.4):
> pow(−∞, y) returns +∞ for y > 0 and not an odd integer. Oddly, this clause seems to be missing from section 9.2.1 of IEEE 754. Nevertheless, I believe it's the right thing to do. IEEE 754 _does_ say: > pow (x, y) signals the invalid operation exception for finite x < 0 and > finite non-integer y. The omission of -inf here is notable, and suggests that it's _not_ intended that the pow(-inf, 0.5) case should be considered invalid. ---------- nosy: -tim.peters _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue32171> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
