feat(path): add unfold-c attribute to definitions
This commit is contained in:
Floris van Doorn
Leonardo de Moura
parent
17a9bb4bc2
commit
1597337c72
2 changed files with 28 additions and 33 deletions
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@ -24,20 +24,20 @@ namespace eq
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definition idpath [reducible] [constructor] (a : A) := refl a
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-- unbased path induction
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definition rec' [reducible] {P : Π (a b : A), (a = b) -> Type}
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definition rec' [reducible] [unfold-c 6] {P : Π (a b : A), (a = b) → Type}
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(H : Π (a : A), P a a idp) {a b : A} (p : a = b) : P a b p :=
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eq.rec (H a) p
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definition rec_on' [reducible] {P : Π (a b : A), (a = b) -> Type} {a b : A} (p : a = b)
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(H : Π (a : A), P a a idp) : P a b p :=
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definition rec_on' [reducible] [unfold-c 5] {P : Π (a b : A), (a = b) → Type}
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{a b : A} (p : a = b) (H : Π (a : A), P a a idp) : P a b p :=
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eq.rec (H a) p
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/- Concatenation and inverse -/
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definition concat (p : x = y) (q : y = z) : x = z :=
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eq.rec (λu, u) q p
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definition concat [trans] [unfold-c 6] (p : x = y) (q : y = z) : x = z :=
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eq.rec (λp', p') q p
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definition inverse (p : x = y) : y = x :=
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definition inverse [symm] [unfold-c 4] (p : x = y) : y = x :=
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eq.rec (refl x) p
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infix ⬝ := concat
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@ -45,7 +45,6 @@ namespace eq
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--a second notation for the inverse, which is not overloaded
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postfix [parsing-only] `⁻¹ᵖ`:std.prec.max_plus := inverse
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/- The 1-dimensional groupoid structure -/
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-- The identity path is a right unit.
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@ -178,19 +177,20 @@ namespace eq
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/- Transport -/
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definition transport [reducible] (P : A → Type) {x y : A} (p : x = y) (u : P x) : P y :=
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definition transport [subst] [reducible] [unfold-c 5] (P : A → Type) {x y : A} (p : x = y)
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(u : P x) : P y :=
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eq.rec_on p u
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-- This idiom makes the operation right associative.
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notation p `▸` x := transport _ p x
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definition cast [reducible] {A B : Type} (p : A = B) (a : A) : B :=
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definition cast [reducible] [unfold-c 3] {A B : Type} (p : A = B) (a : A) : B :=
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p ▸ a
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definition tr_rev [reducible] (P : A → Type) {x y : A} (p : x = y) (u : P y) : P x :=
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definition tr_rev [reducible] [unfold-c 6] (P : A → Type) {x y : A} (p : x = y) (u : P y) : P x :=
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p⁻¹ ▸ u
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definition ap ⦃A B : Type⦄ (f : A → B) {x y:A} (p : x = y) : f x = f y :=
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definition ap [unfold-c 6] ⦃A B : Type⦄ (f : A → B) {x y:A} (p : x = y) : f x = f y :=
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eq.rec_on p idp
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abbreviation ap01 [parsing-only] := ap
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@ -198,7 +198,7 @@ namespace eq
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definition homotopy [reducible] (f g : Πx, P x) : Type :=
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Πx : A, f x = g x
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notation f ∼ g := homotopy f g
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infix ∼ := homotopy
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namespace homotopy
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protected definition refl [refl] [reducible] (f : Πx, P x) : f ∼ f :=
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@ -207,31 +207,26 @@ namespace eq
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protected definition symm [symm] [reducible] {f g : Πx, P x} (H : f ∼ g) : g ∼ f :=
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λ x, (H x)⁻¹
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protected definition trans [trans] [reducible] {f g h : Πx, P x} (H1 : f ∼ g) (H2 : g ∼ h) : f ∼ h :=
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protected definition trans [trans] [reducible] {f g h : Πx, P x} (H1 : f ∼ g) (H2 : g ∼ h)
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: f ∼ h :=
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λ x, H1 x ⬝ H2 x
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end homotopy
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definition apd10 {f g : Πx, P x} (H : f = g) : f ∼ g :=
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definition apd10 [unfold-c 5] {f g : Πx, P x} (H : f = g) : f ∼ g :=
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λx, eq.rec_on H idp
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--the next theorem is useful if you want to write "apply (apd10' a)"
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definition apd10' {f g : Πx, P x} (a : A) (H : f = g) : f a = g a :=
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definition apd10' [unfold-c 6] {f g : Πx, P x} (a : A) (H : f = g) : f a = g a :=
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eq.rec_on H idp
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definition ap10 [reducible] {f g : A → B} (H : f = g) : f ∼ g := apd10 H
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definition ap10 [reducible] [unfold-c 5] {f g : A → B} (H : f = g) : f ∼ g := apd10 H
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definition ap11 {f g : A → B} (H : f = g) {x y : A} (p : x = y) : f x = g y :=
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eq.rec_on H (eq.rec_on p idp)
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definition apd (f : Πa:A, P a) {x y : A} (p : x = y) : p ▸ f x = f y :=
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definition apd [unfold-c 6] (f : Πa, P a) {x y : A} (p : x = y) : p ▸ f x = f y :=
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eq.rec_on p idp
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/- calc enviroment -/
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attribute transport [subst]
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attribute concat [trans]
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attribute inverse [symm]
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/- More theorems for moving things around in equations -/
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definition tr_eq_of_eq_inv_tr {P : A → Type} {x y : A} {p : x = y} {u : P x} {v : P y} :
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@ -437,7 +432,7 @@ namespace eq
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-- Dependent transport in a doubly dependent type.
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definition transportD {P : A → Type} (Q : Π a : A, P a → Type)
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definition transportD [unfold-c 6] {P : A → Type} (Q : Πa, P a → Type)
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{a a' : A} (p : a = a') (b : P a) (z : Q a b) : Q a' (p ▸ b) :=
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eq.rec_on p z
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@ -445,7 +440,7 @@ namespace eq
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notation p `▸D`:65 x:64 := transportD _ p _ x
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-- Transporting along higher-dimensional paths
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definition transport2 (P : A → Type) {x y : A} {p q : x = y} (r : p = q) (z : P x) :
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definition transport2 [unfold-c 7] (P : A → Type) {x y : A} {p q : x = y} (r : p = q) (z : P x) :
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p ▸ z = q ▸ z :=
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ap (λp', p' ▸ z) r
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@ -466,7 +461,7 @@ namespace eq
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transport2 Q r⁻¹ z = (transport2 Q r z)⁻¹ :=
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eq.rec_on r idp
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definition transportD2 (B C : A → Type) (D : Π(a:A), B a → C a → Type)
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definition transportD2 [unfold-c 7] (B C : A → Type) (D : Π(a:A), B a → C a → Type)
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{x1 x2 : A} (p : x1 = x2) (y : B x1) (z : C x1) (w : D x1 y z) : D x2 (p ▸ y) (p ▸ z) :=
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eq.rec_on p w
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@ -537,16 +532,16 @@ namespace eq
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/- The 2-dimensional groupoid structure -/
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-- Horizontal composition of 2-dimensional paths.
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definition concat2 {p p' : x = y} {q q' : y = z} (h : p = p') (h' : q = q') : p ⬝ q = p' ⬝ q' :=
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definition concat2 {p p' : x = y} {q q' : y = z} (h : p = p') (h' : q = q')
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: p ⬝ q = p' ⬝ q' :=
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eq.rec_on h (eq.rec_on h' idp)
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infixl `◾`:75 := concat2
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-- 2-dimensional path inversion
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definition inverse2 {p q : x = y} (h : p = q) : p⁻¹ = q⁻¹ :=
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definition inverse2 [unfold-c 6] {p q : x = y} (h : p = q) : p⁻¹ = q⁻¹ :=
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eq.rec_on h idp
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/- Whiskering -/
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definition whisker_left (p : x = y) {q r : y = z} (h : q = r) : p ⬝ q = p ⬝ r :=
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@ -625,7 +620,7 @@ namespace eq
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⬝ (!whisker_left_idp_left ◾ !whisker_right_idp_right)
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-- The action of functions on 2-dimensional paths
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definition ap02 (f : A → B) {x y : A} {p q : x = y} (r : p = q) : ap f p = ap f q :=
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definition ap02 [unfold-c 8] (f : A → B) {x y : A} {p q : x = y} (r : p = q) : ap f p = ap f q :=
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eq.rec_on r idp
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definition ap02_con (f : A → B) {x y : A} {p p' p'' : x = y} (r : p = p') (r' : p' = p'') :
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@ -639,7 +634,7 @@ namespace eq
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⬝ (ap_con f p' q')⁻¹ :=
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eq.rec_on r (eq.rec_on s (eq.rec_on q (eq.rec_on p idp)))
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definition apd02 {p q : x = y} (f : Π x, P x) (r : p = q) :
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definition apd02 [unfold-c 8] {p q : x = y} (f : Π x, P x) (r : p = q) :
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apd f p = transport2 P r (f x) ⬝ apd f q :=
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eq.rec_on r !idp_con⁻¹
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@ -69,7 +69,7 @@ namespace is_trunc
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fapply (IH (g b = g b')),
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{ intro q, exact ((ε b)⁻¹ ⬝ ap f q ⬝ ε b')},
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{ apply (is_retraction.mk (ap g)),
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{ intro p, cases p, {rewrite [↑ap, con_idp, con.left_inv]}}},
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{ intro p, cases p, {rewrite [↑ap, con.left_inv]}}},
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{ apply is_trunc_eq}}
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end
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