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

Tue Mar 20 02:27:06 CET 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

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