10 lines
226 B
Text
10 lines
226 B
Text
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open quot
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variables {A : Type} {B : A → Type}
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variable f : Π a : A, B a
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eval λ x, quot.lift_on ⟦f⟧ (λf : (Πx : A, B x), f) _ x
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example (x : A) : quot.lift_on ⟦f⟧ (λf : (Πx : A, B x), f) sorry x = f x :=
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rfl
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