12 lines
251 B
Text
12 lines
251 B
Text
import logic
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set_option pp.notation false
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inductive Functor :=
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mk : (Π (A B : Type), A → B) → Functor
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definition Functor.to_fun [coercion] (f : Functor) {A B : Type} : A → B :=
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Functor.rec (λ f, f) f A B
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variable f : Functor
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check f 0 = 0
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