[Haskell-cafe] Complex numbers and (**)

[Henning Thielemann]

On Sun, 9 Aug 2009, Paul Sargent wrote:

> Well, I'm an engineer rather than a mathematician, so I'm not 100% sure I followed everything
> on that page, but you seem to be saying that nth-root can't be done because we're using
> floating point, and floating point isn't accurate enough to represent 1/n.

Yes that's one problem.

> I basically agree with this, which was why I asked about nth-root functions, but for my uses
> (**) is good enough as long as complex zero works.

In NumericPrelude we have the 'root' function for that purpose.