[Haskell-cafe] Composition and type magic

Hi everyone, I defined a function for discrete convolution, i.e conv xs = sum . zipWith (*) xs . reverse And I was wondering, can it be done without explicitly passing in the xs (eta-reduction)? I've seen people play with (.).(.) and foldl foldl foldl and was thinking that maybe something similar might be used here. -- Regards Sumit Sahrawat