Re: [Haskell-cafe] Are there arithmetic composition of functions?

20 Mar 2012

      Richard O'Keefe:
...
class (Eq a, Show a) =>  Num a
       where (+) (-) (*) negate abs signum fromInteger
where functions are for good reason not members of Eq or Show.
This is an old song, changed several times. I have no intention to 
discuss, but please, Richard O'Keefe:
WHICH *GOOD* REASONS??

Thank you.

Jerzy Karczmarczuk