On Wed, Dec 08, 2004 at 11:11:44AM +0000, Keean Schupke wrote: > You can also do this in a way that statically guarantees the property... > > First you need to lift the numeric argument to the type level... This is > harder for a double than an integer, but not impossible... First convert > the double to a pair of Integers (an infintite precision rational > number)... Then each Integer can be represented as a uniary number (this > is the simplest but you will run out of context reduction stack on any > kind of real number, so binary or decimal representation is better). The > definitions required for this are in the attached library.
Alternatively, you could just use atan or erfc to map between the complete set of real numbers and the range from 0 to 1. This sort of trick is sometimes helpful to convert a constrained minimization into an unconstrained one. -- David Roundy http://www.darcs.net _______________________________________________ Haskell-Cafe mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/haskell-cafe
