Maybe this is most convincing:
(3) -> ((-1) :: Complex(DoubleFloat))^(0.5)
(3) 6.123233995736766e-17 - %i
Type:
Complex(DoubleFloat)
(4) -> ((-1) :: Complex(DoubleFloat))^(1/2)
(4) %i
Type:
Complex(DoubleFloat)
I would say that this is undesired behavior and just confuses people.
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