Nils Anders Danielsson wrote:

A function like this has been suggested for the standard libraries a couple of times before. Someone suggested the name "on", which I quite like:

(*) `on` f = \x y -> f x * f y

Thanks! I always wanted to be someone. :-) Here's the link. http://www.haskell.org//pipermail/haskell-cafe/2004-December/007917.html - Tom