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(.).(.) and the term "function composition composition" are a really bad idea (except as fun maths puzzles). Just use \f g x y -> f (g x y) and be done with it

by tome 13y ago

(.).(.) and the term "function composition composition" are a really bad idea (except as fun maths puzzles). Just use \f g x y -> f (g x y) and be done with it.