Nuprl Lemma : do-apply-compose' 11,40

ABC:Type, g:(A(B + Top)), f:(ABC), x:A.
(can-apply(f o' g;x))  (do-apply(f o' g;x) ~ (f(x,do-apply(g;x)))) 
latex


ProofTree


DefinitionsFalse, t  T, P  Q, b, True, left + right, Top, x:AB(x), x:AB(x), s = t, f(a), do-apply(f;x), can-apply(f;x), f o' g, Type
Lemmastrue wf, false wf

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