[Haskell-cafe] Why does the class called "Real" support only rationals, and not all reals?

Henning Thielemann lemming at henning-thielemann.de
Mon Jun 4 11:28:13 EDT 2007

On Mon, 4 Jun 2007, bretm wrote:

> Henning Thielemann wrote:
> >
> > Is your approach more like symbolic calculation or more like a
> > representation for computable reals?
> >
> > http://www.haskell.org/haskellwiki/Applications_and_libraries/Mathematics#Number_representations
> Computable reals, specifically continued fraction representation. I know I'm
> reinventing the wheel here

Jan Skibinski did it for Haskell, too.

> (I was using an OCaml implementation called ContFrac as a guide to the
> algorithms) but I'm just playing with this as a vehicle for learning
> Haskell.

If you plan to use NumericPrelude, I'll glad to hear experiences about the
usefulness of the NumericPrelude class hierarchy, and we could add it to
that library.

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