From: "Mauricio Fernández" <batsman.geo@...>
Date: 2003-02-06T07:35:17+09:00
Subject: Re: Error in Complex

On Thu, Feb 06, 2003 at 07:19:00AM +0900, Hal E. Fulton wrote:
> > -i = exp(-i * pi/2)
> > (-i)^(2/3) = (1)^2/3 * exp(-i * pi/2 * 2/3)
> >            = exp(-i * pi/3)
> >    = cos(pi/3) - i sin(pi/3)
> >    = 1/2 - sqrt(3)/2
> 
> OK, I admit I'm showing my ignorance here.
> How do you reconcile that with:
> 
> (-i)**(2/3.0) 
> ((-i)**2)**3.0)
           ^^^^^^
  ((-i)^2)^(1/3)
> (-1)**3.0
> -1
> 
> ??
> Hal
> 

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