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@ -24,11 +24,13 @@ A dependently typed system
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# TODO
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* Universes
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* Universes (a la tarksi)
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* Elaboration
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* Implicit arguments
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* Universe family application
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* Syntax level russel universes
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* Universe of all other universes? (universe polymorphism)
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* Inductives
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* Indexed inductives
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@ -5,3 +5,7 @@ let transport : Π (A : Type) Π (f : A → Type) Π (x : A) Π (y : A)
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let ap : Π (A : Type) Π (B : Type) Π (f : A → B)
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Π (x : A) Π (y : A) Id A x y → Id B (f x) (f y)
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≔ λA.λB.λf.λx.λy. J A x y (λa.λb.λ_. Id B (f a) (f b)) (refl B (f x))
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let cat : Π (A : Type) Π (x : A) Π (y : A) Π (z : A)
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Id A x y → Id A y z → Id A x z
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≔ λA.λx.λy.λz.λp.λq. J A y z (λa.λb.λr. Id A x b) (refl A y) q
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