12 lines
488 B
Text
12 lines
488 B
Text
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Variable C : Pi (A B : Type) (H : A = B) (a : A), B
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Variable D : Pi (A A' : Type) (B : A -> Type) (B' : A' -> Type) (H : (Pi x : A, B x) = (Pi x : A', B' x)), A = A'
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Variable R : Pi (A A' : Type) (B : A -> Type) (B' : A' -> Type) (H : (Pi x : A, B x) = (Pi x : A', B' x)) (a : A),
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(B a) = (B' (C A A' (D A A' B B' H) a))
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Theorem R2 : Pi (A1 A2 B1 B2 : Type) (H : A1 -> B1 = A2 -> B2) (a : A1), B1 = B2 :=
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fun A1 A2 B1 B2 H a,
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R _ _ _ _ H a
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Show Environment 1.
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