Re: [Haskell-cafe] Is there a name for this property: x + x - x == x

If you have associativity, this seems roughly the same as saying there is an additive inverse for every x, because x + x - x = x => x + (x - x) = x => x + 0 = x. On Wed, Jun 4, 2014 at 7:34 AM, Omari Norman wrote:

It's not quite idempotence, because more than one function is involved.

It's a common property and I figure I can write a higher order function to build QuickCheck tests for it. I was just wondering if it has a name.

_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe