I did see that one on the wiki; but it doesn't seem to support the open intervals (i.e. (-inf, 3)) and I'd really like those. That is the leading candidate right now though... There was also this one: http://www.dinkla.net/fp/cglib.html It mentions "rangetrees" but I'm not sure if that's the kind I'm thinking of. That package has what seems like scary math. Thanks, Nick On 12/8/06, Taral wrote:

Some of that is in the Ranged Sets library:

http://ranged-sets.sourceforge.net/Ranged/

but it doesn't support Num.

On 12/8/06, Nicolas Frisby wrote:

...

I'm looking to not reinvent the wheel.

Is there an existing package that supports interval arithmetic on integers (or more)? A possible complication is that I'm hoping to include open intervals such as (GreaterEqThan 3).

-- Taral "You can't prove anything." -- Gödel's Incompetence Theorem

Fantastic! Just another bit of evidence that Haskell Cafe + one night's sleep can save a great deal of work. :) Thanks for pointing that out, Nick On 12/8/06, Taral wrote:

On 12/8/06, Nicolas Frisby wrote:

...

I did see that one on the wiki; but it doesn't seem to support the open intervals (i.e. (-inf, 3)) and I'd really like those.

Oh, it does. See BoundaryAboveAll and BoundaryBelowAll.

-- Taral "You can't prove anything." -- Gödel's Incompetence Theorem