2014-11-04 02:44:36 +00:00
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funext : ∀ {A : Type} {B : A → Type} {f g : Π (a : A), B a}, (∀ (a : A), f a = g a) → f = g
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2015-02-24 21:34:52 +00:00
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strong_indefinite_description : Π {A : Type} (P : A → Prop), nonempty A → { (x : A) | (∃ (y : A), P y) → P x }
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