chore(hott) reflect @avigad's name changes in the std library
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3 changed files with 8 additions and 27 deletions
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@ -19,20 +19,20 @@ assume Ha : a, absurd (H₁ Ha) H₂
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-- not
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-- ---
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definition not_empty : ¬ empty :=
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protected definition not_empty : ¬ empty :=
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assume H : empty, H
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definition not_not_intro {a : Type} (Ha : a) : ¬¬a :=
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assume Hna : ¬a, absurd Ha Hna
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definition not_intro {a : Type} (H : a → empty) : ¬a := H
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definition not.intro {a : Type} (H : a → empty) : ¬a := H
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definition not_elim {a : Type} (H₁ : ¬a) (H₂ : a) : empty := H₁ H₂
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definition not.elim {a : Type} (H₁ : ¬a) (H₂ : a) : empty := H₁ H₂
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definition not_implies_left {a b : Type} (H : ¬(a → b)) : ¬¬a :=
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definition not_not_of_not_implies {a b : Type} (H : ¬(a → b)) : ¬¬a :=
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assume Hna : ¬a, absurd (assume Ha : a, absurd Ha Hna) H
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definition not_implies_right {a b : Type} (H : ¬(a → b)) : ¬b :=
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definition not_of_not_implies {a b : Type} (H : ¬(a → b)) : ¬b :=
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assume Hb : b, absurd (assume Ha : a, Hb) H
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-- eq
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@ -43,7 +43,7 @@ definition rfl {A : Type} {a : A} := eq.refl a
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namespace eq
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variables {A : Type}
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variables {a b c a': A}
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variables {a b c a' : A}
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definition subst {P : A → Type} (H₁ : a = b) (H₂ : P a) : P b :=
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rec H₂ H₁
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@ -14,23 +14,3 @@ end empty
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protected definition empty.has_decidable_eq [instance] : decidable_eq empty :=
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take (a b : empty), decidable.inl (!empty.elim a)
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definition tneg.tneg (A : Type) := A → empty
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prefix `~` := tneg.tneg
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namespace tneg
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variables {A B : Type}
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protected definition intro (H : A → empty) : ~A := H
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protected definition elim (H1 : ~A) (H2 : A) : empty := H1 H2
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protected definition empty : ~empty := λH : empty, H
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definition tabsurd (H1 : A) (H2 : ~A) : B := !empty.elim (H2 H1)
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definition tneg_tneg_intro (H : A) : ~~A := λH2 : ~A, tneg.elim H2 H
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definition tmt (H1 : A → B) (H2 : ~B) : ~A := λHA : A, tabsurd (H1 HA) H2
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definition tneg_pi_left {B : A → Type} (H : ~Πa, B a) : ~~A :=
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λHnA : ~A, tneg.elim H (λHA : A, tabsurd HA HnA)
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definition tneg_function_right (H : ~(A → B)) : ~B :=
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λHB : B, tneg.elim H (λHA : A, HB)
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end tneg
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@ -1,9 +1,10 @@
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--javra: Maybe this should go somewhere else
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open eq
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inductive tdecidable [class] (A : Type) : Type :=
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inl : A → tdecidable A,
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inr : ~A → tdecidable A
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inr : ¬A → tdecidable A
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structure decidable_paths [class] (A : Type) :=
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(elim : ∀(x y : A), tdecidable (x = y))
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