17 lines
377 B
Text
17 lines
377 B
Text
import data.nat
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open nat
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inductive fn2 (A B C : Type) :=
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mk : (A → C) → (B → C) → fn2 A B C
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definition to_ac [coercion] {A B C : Type} (f : fn2 A B C) : A → C :=
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fn2.rec (λ f g, f) f
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definition to_bc [coercion] {A B C : Type} (f : fn2 A B C) : B → C :=
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fn2.rec (λ f g, g) f
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constant f : fn2 Prop nat nat
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constant a : Prop
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constant n : nat
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check f a
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check f n
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