On Jan 23, 8:26 pm, "Ted Kosan" <[EMAIL PROTECTED]> wrote:
> Mike wrote:
> > It is due to the fact that ^ has a higher precedence than - in Python.
> > n(-1^(1/3)) is the same as n((-1^(1/3))).
>
> Okay, here is how I ran into this:
>
> https://sage.ssu.portsmouth.oh.us:9000/home/pub/21/
>
> What I expected to get was -1.44224957030741. Which result should it produce?
>
> Ted
What's interesting here is that the output of the cube root of -1 is
not -1, but the "first clockwise" root from 1+0i, or the usual choice
for a primitive sixth root of unity. But what Ted really wanted was
just the real cube root of -1.
What is the "desired" output here by the developers? Or is this
Python-internal? Boy, I can really think of times I would want either
output without having to specify real or complex, and I suppose
sometimes one might want a list of all three roots.
- kcrisman
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