Let us briefly recall the restricted form of … [refs]. It is the combinator ext()() obeying these three equations: ext(f){}={} … CPL is ext{e_1|\x<-e_2}, which is interpreted as ext(f)(e_2), … Kleisli and is at the heart of the … As pointed out by [Wadler, P. Math. Struct. Comput. Sci. 1992], any comprehension can …
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