No mentions to report in SUPPORTjlc
for	Def For{T,op,id} x as. f(x) == reduce(op;id;map(x:T. f(x);as))
	Thm* A,B,C:Type, f:(BCC), k:C, as:A List, g:(AB). (For{A,f,k} x as. g(x)) C
tlambda	Def (x:T. b(x))(x) == b(x)
map	Def map(f;as) == Case of as; nil nil ; a.as' f(a).map(f;as') (recursive)
	Thm* A,B:Type, f:(AB), l:A List. map(f;l) B List
reduce	Def reduce(f;k;as) == Case of as; nil k ; a.as' f(a,reduce(f;k;as')) (recursive)
	Thm* A,B:Type, f:(ABB), k:B, as:A List. reduce(f;k;as) B

Syntax:

For{T,op,id} x as. f(x)

has structure:

for(T; op; id; as; x.f(x))

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