[Haskell-cafe] How to read this syntax?

Hi, I am trying to read _Arrows, Robots, and Functional Reactive Programming_ by Hudak, et al. http://www.haskell.org/yampa/AFPLectureNotes.pdf In section 2.1 there are a number of equations of the form: g’ :: SF A C g’ = arr g = arr f1 >>> arr f2 and i’ :: SF (A,C) (B,D) i’ = arr i = arr (f1 . fst) &&& arr (f2 . snd) = (arr fst >>> arr f1) &&& (arr snd >>> arr f2) I can't find any reference to the syntax where the function left hand side is just "space." I'd greatly appreciate any insight. -------------------------------- David F. Place mailto:d@vidplace.com