topology.homotopy.equiv | Mathlib porting status

Changes since the initial port

The following section lists changes to this file in mathlib3 and mathlib4 that occured after the initial port. Most recent changes are shown first. Hovering over a commit will show all commits associated with the same mathlib3 commit.

Changes in mathlib3

3d7987cd

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

93287238

bump to nightly-2023-09-24-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce64cd319bb6b3e82f31c2d38e79080d377be451

5655435f

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2021 Shing Tak Lam. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Shing Tak Lam
 -/
-import Mathbin.Topology.Homotopy.Basic
+import Topology.Homotopy.Basic
 
 #align_import topology.homotopy.equiv from "leanprover-community/mathlib"@"932872382355f00112641d305ba0619305dc8642"

93287238

bump to nightly-2023-07-20-09

mathlib commit https://github.com/leanprover-community/mathlib/commit/8ea5598db6caeddde6cb734aa179cc2408dbd345

9c56d0dd

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2021 Shing Tak Lam. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Shing Tak Lam
-
-! This file was ported from Lean 3 source module topology.homotopy.equiv
-! leanprover-community/mathlib commit 932872382355f00112641d305ba0619305dc8642
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Topology.Homotopy.Basic
 
+#align_import topology.homotopy.equiv from "leanprover-community/mathlib"@"932872382355f00112641d305ba0619305dc8642"
+
 /-!
 
 # Homotopy equivalences between topological spaces

93287238

bump to nightly-2023-06-13-21

mathlib commit https://github.com/leanprover-community/mathlib/commit/9fb8964792b4237dac6200193a0d533f1b3f7423

829520ac

Diff

@@ -55,7 +55,6 @@ structure HomotopyEquiv (X : Type u) (Y : Type v) [TopologicalSpace X] [Topologi
 #align continuous_map.homotopy_equiv ContinuousMap.HomotopyEquiv
 -/
 
--- mathport name: continuous_map.homotopy_equiv
 scoped infixl:25 " ≃ₕ " => ContinuousMap.HomotopyEquiv
 
 namespace HomotopyEquiv
@@ -63,15 +62,19 @@ namespace HomotopyEquiv
 instance : CoeFun (HomotopyEquiv X Y) fun _ => X → Y :=
   ⟨fun h => h.toFun⟩
 
+#print ContinuousMap.HomotopyEquiv.toFun_eq_coe /-
 @[simp]
 theorem toFun_eq_coe (h : HomotopyEquiv X Y) : (h.toFun : X → Y) = h :=
   rfl
 #align continuous_map.homotopy_equiv.to_fun_eq_coe ContinuousMap.HomotopyEquiv.toFun_eq_coe
+-/
 
+#print ContinuousMap.HomotopyEquiv.continuous /-
 @[continuity]
 theorem continuous (h : HomotopyEquiv X Y) : Continuous h :=
   h.toFun.Continuous
 #align continuous_map.homotopy_equiv.continuous ContinuousMap.HomotopyEquiv.continuous
+-/
 
 end HomotopyEquiv
 
@@ -93,10 +96,12 @@ def toHomotopyEquiv (h : X ≃ₜ Y) : X ≃ₕ Y
 #align homeomorph.to_homotopy_equiv Homeomorph.toHomotopyEquiv
 -/
 
+#print Homeomorph.coe_toHomotopyEquiv /-
 @[simp]
 theorem coe_toHomotopyEquiv (h : X ≃ₜ Y) : ⇑h.toHomotopyEquiv = h :=
   rfl
 #align homeomorph.coe_to_homotopy_equiv Homeomorph.coe_toHomotopyEquiv
+-/
 
 end Homeomorph
 
@@ -115,10 +120,12 @@ def symm (h : X ≃ₕ Y) : Y ≃ₕ X where
 #align continuous_map.homotopy_equiv.symm ContinuousMap.HomotopyEquiv.symm
 -/
 
+#print ContinuousMap.HomotopyEquiv.coe_invFun /-
 @[simp]
 theorem coe_invFun (h : HomotopyEquiv X Y) : (⇑h.invFun : Y → X) = ⇑h.symm :=
   rfl
 #align continuous_map.homotopy_equiv.coe_inv_fun ContinuousMap.HomotopyEquiv.coe_invFun
+-/
 
 #print ContinuousMap.HomotopyEquiv.Simps.apply /-
 /-- See Note [custom simps projection]. We need to specify this projection explicitly in this case,

93287238

bump to nightly-2023-05-28-18

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

8d353152

Diff

@@ -77,7 +77,7 @@ end HomotopyEquiv
 
 end ContinuousMap
 
-open ContinuousMap
+open scoped ContinuousMap
 
 namespace Homeomorph

93287238

bump to nightly-2023-05-28-06

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

ba5d8b97

Diff

@@ -63,23 +63,11 @@ namespace HomotopyEquiv
 instance : CoeFun (HomotopyEquiv X Y) fun _ => X → Y :=
   ⟨fun h => h.toFun⟩
 
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 @[simp]
 theorem toFun_eq_coe (h : HomotopyEquiv X Y) : (h.toFun : X → Y) = h :=
   rfl
 #align continuous_map.homotopy_equiv.to_fun_eq_coe ContinuousMap.HomotopyEquiv.toFun_eq_coe
 
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 @[continuity]
 theorem continuous (h : HomotopyEquiv X Y) : Continuous h :=
   h.toFun.Continuous
@@ -105,12 +93,6 @@ def toHomotopyEquiv (h : X ≃ₜ Y) : X ≃ₕ Y
 #align homeomorph.to_homotopy_equiv Homeomorph.toHomotopyEquiv
 -/
 
-/- warning: homeomorph.coe_to_homotopy_equiv -> Homeomorph.coe_toHomotopyEquiv is a dubious translation:
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 @[simp]
 theorem coe_toHomotopyEquiv (h : X ≃ₜ Y) : ⇑h.toHomotopyEquiv = h :=
   rfl
@@ -133,12 +115,6 @@ def symm (h : X ≃ₕ Y) : Y ≃ₕ X where
 #align continuous_map.homotopy_equiv.symm ContinuousMap.HomotopyEquiv.symm
 -/
 
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 @[simp]
 theorem coe_invFun (h : HomotopyEquiv X Y) : (⇑h.invFun : Y → X) = ⇑h.symm :=
   rfl

93287238

bump to nightly-2023-05-28-04

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

6797a637

Diff

@@ -100,14 +100,8 @@ def toHomotopyEquiv (h : X ≃ₜ Y) : X ≃ₕ Y
     where
   toFun := ⟨h⟩
   invFun := ⟨h.symm⟩
-  left_inv := by
-    convert ContinuousMap.Homotopic.refl _
-    ext
-    simp
-  right_inv := by
-    convert ContinuousMap.Homotopic.refl _
-    ext
-    simp
+  left_inv := by convert ContinuousMap.Homotopic.refl _; ext; simp
+  right_inv := by convert ContinuousMap.Homotopic.refl _; ext; simp
 #align homeomorph.to_homotopy_equiv Homeomorph.toHomotopyEquiv
 -/

93287238

bump to nightly-2023-03-19-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/1f4705ccdfe1e557fc54a0ce081a05e33d2e6240

b19efad4

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Shing Tak Lam
 
 ! This file was ported from Lean 3 source module topology.homotopy.equiv
-! leanprover-community/mathlib commit 3d7987cda72abc473c7cdbbb075170e9ac620042
+! leanprover-community/mathlib commit 932872382355f00112641d305ba0619305dc8642
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -14,6 +14,9 @@ import Mathbin.Topology.Homotopy.Basic
 
 # Homotopy equivalences between topological spaces
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 In this file, we define homotopy equivalences between topological spaces `X` and `Y` as a pair of
 functions `f : C(X, Y)` and `g : C(Y, X)` such that `f.comp g` and `g.comp f` are both homotopic
 to `id`.

3d7987cd

bump to nightly-2023-03-16-13

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce7e9d53d4bbc38065db3b595cd5bd73c323bc1d

d225db81

Diff

@@ -38,6 +38,7 @@ variable [TopologicalSpace X] [TopologicalSpace Y] [TopologicalSpace Z]
 
 namespace ContinuousMap
 
+#print ContinuousMap.HomotopyEquiv /-
 /-- A homotopy equivalence between topological spaces `X` and `Y` are a pair of functions
 `to_fun : C(X, Y)` and `inv_fun : C(Y, X)` such that `to_fun.comp inv_fun` and `inv_fun.comp to_fun`
 are both homotopic to `id`.
@@ -49,6 +50,7 @@ structure HomotopyEquiv (X : Type u) (Y : Type v) [TopologicalSpace X] [Topologi
   left_inv : (inv_fun.comp to_fun).Homotopic (ContinuousMap.id X)
   right_inv : (to_fun.comp inv_fun).Homotopic (ContinuousMap.id Y)
 #align continuous_map.homotopy_equiv ContinuousMap.HomotopyEquiv
+-/
 
 -- mathport name: continuous_map.homotopy_equiv
 scoped infixl:25 " ≃ₕ " => ContinuousMap.HomotopyEquiv
@@ -58,11 +60,23 @@ namespace HomotopyEquiv
 instance : CoeFun (HomotopyEquiv X Y) fun _ => X → Y :=
   ⟨fun h => h.toFun⟩
 
+/- warning: continuous_map.homotopy_equiv.to_fun_eq_coe -> ContinuousMap.HomotopyEquiv.toFun_eq_coe is a dubious translation:
+lean 3 declaration is
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+but is expected to have type
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2), Eq.{max (succ u1) (succ u2)} (forall (a : X), (fun (x._@.Mathlib.Topology.ContinuousFunction.Basic._hyg.699 : X) => Y) a) (FunLike.coe.{max (succ u1) (succ u2), succ u1, succ u2} (ContinuousMap.{u1, u2} X Y _inst_1 _inst_2) X (fun (_x : X) => (fun (x._@.Mathlib.Topology.ContinuousFunction.Basic._hyg.699 : X) => Y) _x) (ContinuousMapClass.toFunLike.{max u1 u2, u1, u2} (ContinuousMap.{u1, u2} X Y _inst_1 _inst_2) X Y _inst_1 _inst_2 (ContinuousMap.instContinuousMapClassContinuousMap.{u1, u2} X Y _inst_1 _inst_2)) (ContinuousMap.HomotopyEquiv.toFun.{u1, u2} X Y _inst_1 _inst_2 h)) (ContinuousMap.HomotopyEquiv.toFun'.{u1, u2} X Y _inst_1 _inst_2 h)
+Case conversion may be inaccurate. Consider using '#align continuous_map.homotopy_equiv.to_fun_eq_coe ContinuousMap.HomotopyEquiv.toFun_eq_coeₓ'. -/
 @[simp]
 theorem toFun_eq_coe (h : HomotopyEquiv X Y) : (h.toFun : X → Y) = h :=
   rfl
 #align continuous_map.homotopy_equiv.to_fun_eq_coe ContinuousMap.HomotopyEquiv.toFun_eq_coe
 
+/- warning: continuous_map.homotopy_equiv.continuous -> ContinuousMap.HomotopyEquiv.continuous is a dubious translation:
+lean 3 declaration is
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2), Continuous.{u1, u2} X Y _inst_1 _inst_2 (coeFn.{max (succ u1) (succ u2), max (succ u1) (succ u2)} (ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2) (fun (_x : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2) => X -> Y) (ContinuousMap.HomotopyEquiv.hasCoeToFun.{u1, u2} X Y _inst_1 _inst_2) h)
+but is expected to have type
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2), Continuous.{u1, u2} X Y _inst_1 _inst_2 (ContinuousMap.HomotopyEquiv.toFun'.{u1, u2} X Y _inst_1 _inst_2 h)
+Case conversion may be inaccurate. Consider using '#align continuous_map.homotopy_equiv.continuous ContinuousMap.HomotopyEquiv.continuousₓ'. -/
 @[continuity]
 theorem continuous (h : HomotopyEquiv X Y) : Continuous h :=
   h.toFun.Continuous
@@ -76,6 +90,7 @@ open ContinuousMap
 
 namespace Homeomorph
 
+#print Homeomorph.toHomotopyEquiv /-
 /-- Any homeomorphism is a homotopy equivalence.
 -/
 def toHomotopyEquiv (h : X ≃ₜ Y) : X ≃ₕ Y
@@ -91,7 +106,14 @@ def toHomotopyEquiv (h : X ≃ₜ Y) : X ≃ₕ Y
     ext
     simp
 #align homeomorph.to_homotopy_equiv Homeomorph.toHomotopyEquiv
+-/
 
+/- warning: homeomorph.coe_to_homotopy_equiv -> Homeomorph.coe_toHomotopyEquiv is a dubious translation:
+lean 3 declaration is
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : Homeomorph.{u1, u2} X Y _inst_1 _inst_2), Eq.{max (succ u1) (succ u2)} (X -> Y) (coeFn.{max (succ u1) (succ u2), max (succ u1) (succ u2)} (ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2) (fun (_x : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2) => X -> Y) (ContinuousMap.HomotopyEquiv.hasCoeToFun.{u1, u2} X Y _inst_1 _inst_2) (Homeomorph.toHomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2 h)) (coeFn.{max (succ u1) (succ u2), max (succ u1) (succ u2)} (Homeomorph.{u1, u2} X Y _inst_1 _inst_2) (fun (_x : Homeomorph.{u1, u2} X Y _inst_1 _inst_2) => X -> Y) (Homeomorph.hasCoeToFun.{u1, u2} X Y _inst_1 _inst_2) h)
+but is expected to have type
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : Homeomorph.{u1, u2} X Y _inst_1 _inst_2), Eq.{max (succ u1) (succ u2)} (X -> Y) (ContinuousMap.HomotopyEquiv.toFun'.{u1, u2} X Y _inst_1 _inst_2 (Homeomorph.toHomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2 h)) (FunLike.coe.{max (succ u1) (succ u2), succ u1, succ u2} (Homeomorph.{u1, u2} X Y _inst_1 _inst_2) X (fun (_x : X) => Y) (EmbeddingLike.toFunLike.{max (succ u1) (succ u2), succ u1, succ u2} (Homeomorph.{u1, u2} X Y _inst_1 _inst_2) X Y (EquivLike.toEmbeddingLike.{max (succ u1) (succ u2), succ u1, succ u2} (Homeomorph.{u1, u2} X Y _inst_1 _inst_2) X Y (Homeomorph.instEquivLikeHomeomorph.{u1, u2} X Y _inst_1 _inst_2))) h)
+Case conversion may be inaccurate. Consider using '#align homeomorph.coe_to_homotopy_equiv Homeomorph.coe_toHomotopyEquivₓ'. -/
 @[simp]
 theorem coe_toHomotopyEquiv (h : X ≃ₜ Y) : ⇑h.toHomotopyEquiv = h :=
   rfl
@@ -103,6 +125,7 @@ namespace ContinuousMap
 
 namespace HomotopyEquiv
 
+#print ContinuousMap.HomotopyEquiv.symm /-
 /-- If `X` is homotopy equivalent to `Y`, then `Y` is homotopy equivalent to `X`.
 -/
 def symm (h : X ≃ₕ Y) : Y ≃ₕ X where
@@ -111,37 +134,51 @@ def symm (h : X ≃ₕ Y) : Y ≃ₕ X where
   left_inv := h.right_inv
   right_inv := h.left_inv
 #align continuous_map.homotopy_equiv.symm ContinuousMap.HomotopyEquiv.symm
+-/
 
+/- warning: continuous_map.homotopy_equiv.coe_inv_fun -> ContinuousMap.HomotopyEquiv.coe_invFun is a dubious translation:
+lean 3 declaration is
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2), Eq.{max (succ u2) (succ u1)} (Y -> X) (coeFn.{max (succ u2) (succ u1), max (succ u2) (succ u1)} (ContinuousMap.{u2, u1} Y X _inst_2 _inst_1) (fun (_x : ContinuousMap.{u2, u1} Y X _inst_2 _inst_1) => Y -> X) (ContinuousMap.hasCoeToFun.{u2, u1} Y X _inst_2 _inst_1) (ContinuousMap.HomotopyEquiv.invFun.{u1, u2} X Y _inst_1 _inst_2 h)) (coeFn.{max (succ u2) (succ u1), max (succ u2) (succ u1)} (ContinuousMap.HomotopyEquiv.{u2, u1} Y X _inst_2 _inst_1) (fun (_x : ContinuousMap.HomotopyEquiv.{u2, u1} Y X _inst_2 _inst_1) => Y -> X) (ContinuousMap.HomotopyEquiv.hasCoeToFun.{u2, u1} Y X _inst_2 _inst_1) (ContinuousMap.HomotopyEquiv.symm.{u1, u2} X Y _inst_1 _inst_2 h))
+but is expected to have type
+  forall {X : Type.{u1}} {Y : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} X] [_inst_2 : TopologicalSpace.{u2} Y] (h : ContinuousMap.HomotopyEquiv.{u1, u2} X Y _inst_1 _inst_2), Eq.{max (succ u1) (succ u2)} (forall (ᾰ : Y), (fun (x._@.Mathlib.Topology.ContinuousFunction.Basic._hyg.699 : Y) => X) ᾰ) (FunLike.coe.{max (succ u1) (succ u2), succ u2, succ u1} (ContinuousMap.{u2, u1} Y X _inst_2 _inst_1) Y (fun (_x : Y) => (fun (x._@.Mathlib.Topology.ContinuousFunction.Basic._hyg.699 : Y) => X) _x) (ContinuousMapClass.toFunLike.{max u1 u2, u2, u1} (ContinuousMap.{u2, u1} Y X _inst_2 _inst_1) Y X _inst_2 _inst_1 (ContinuousMap.instContinuousMapClassContinuousMap.{u2, u1} Y X _inst_2 _inst_1)) (ContinuousMap.HomotopyEquiv.invFun.{u1, u2} X Y _inst_1 _inst_2 h)) (ContinuousMap.HomotopyEquiv.toFun'.{u2, u1} Y X _inst_2 _inst_1 (ContinuousMap.HomotopyEquiv.symm.{u1, u2} X Y _inst_1 _inst_2 h))
+Case conversion may be inaccurate. Consider using '#align continuous_map.homotopy_equiv.coe_inv_fun ContinuousMap.HomotopyEquiv.coe_invFunₓ'. -/
 @[simp]
 theorem coe_invFun (h : HomotopyEquiv X Y) : (⇑h.invFun : Y → X) = ⇑h.symm :=
   rfl
 #align continuous_map.homotopy_equiv.coe_inv_fun ContinuousMap.HomotopyEquiv.coe_invFun
 
+#print ContinuousMap.HomotopyEquiv.Simps.apply /-
 /-- See Note [custom simps projection]. We need to specify this projection explicitly in this case,
 because it is a composition of multiple projections. -/
 def Simps.apply (h : X ≃ₕ Y) : X → Y :=
   h
 #align continuous_map.homotopy_equiv.simps.apply ContinuousMap.HomotopyEquiv.Simps.apply
+-/
 
+#print ContinuousMap.HomotopyEquiv.Simps.symm_apply /-
 /-- See Note [custom simps projection]. We need to specify this projection explicitly in this case,
 because it is a composition of multiple projections. -/
-def Simps.symmApply (h : X ≃ₕ Y) : Y → X :=
+def Simps.symm_apply (h : X ≃ₕ Y) : Y → X :=
   h.symm
-#align continuous_map.homotopy_equiv.simps.symm_apply ContinuousMap.HomotopyEquiv.Simps.symmApply
+#align continuous_map.homotopy_equiv.simps.symm_apply ContinuousMap.HomotopyEquiv.Simps.symm_apply
+-/
 
 initialize_simps_projections HomotopyEquiv (to_fun_to_fun → apply, inv_fun_to_fun → symm_apply,
   -toFun, -invFun)
 
+#print ContinuousMap.HomotopyEquiv.refl /-
 /-- Any topological space is homotopy equivalent to itself.
 -/
 @[simps]
 def refl (X : Type u) [TopologicalSpace X] : X ≃ₕ X :=
   (Homeomorph.refl X).toHomotopyEquiv
 #align continuous_map.homotopy_equiv.refl ContinuousMap.HomotopyEquiv.refl
+-/
 
 instance : Inhabited (HomotopyEquiv Unit Unit) :=
   ⟨refl Unit⟩
 
+#print ContinuousMap.HomotopyEquiv.trans /-
 /--
 If `X` is homotopy equivalent to `Y`, and `Y` is homotopy equivalent to `Z`, then `X` is homotopy
 equivalent to `Z`.
@@ -167,10 +204,13 @@ def trans (h₁ : X ≃ₕ Y) (h₂ : Y ≃ₕ Z) : X ≃ₕ Z
     refine' homotopic.trans ((homotopic.refl _).hcomp h₁.right_inv) _
     rw [id_comp]
 #align continuous_map.homotopy_equiv.trans ContinuousMap.HomotopyEquiv.trans
+-/
 
+#print ContinuousMap.HomotopyEquiv.symm_trans /-
 theorem symm_trans (h₁ : X ≃ₕ Y) (h₂ : Y ≃ₕ Z) : (h₁.trans h₂).symm = h₂.symm.trans h₁.symm := by
   ext <;> rfl
 #align continuous_map.homotopy_equiv.symm_trans ContinuousMap.HomotopyEquiv.symm_trans
+-/
 
 end HomotopyEquiv
 
@@ -180,22 +220,28 @@ open ContinuousMap
 
 namespace Homeomorph
 
+#print Homeomorph.refl_toHomotopyEquiv /-
 @[simp]
 theorem refl_toHomotopyEquiv (X : Type u) [TopologicalSpace X] :
     (Homeomorph.refl X).toHomotopyEquiv = HomotopyEquiv.refl X :=
   rfl
 #align homeomorph.refl_to_homotopy_equiv Homeomorph.refl_toHomotopyEquiv
+-/
 
+#print Homeomorph.symm_toHomotopyEquiv /-
 @[simp]
 theorem symm_toHomotopyEquiv (h : X ≃ₜ Y) : h.symm.toHomotopyEquiv = h.toHomotopyEquiv.symm :=
   rfl
 #align homeomorph.symm_to_homotopy_equiv Homeomorph.symm_toHomotopyEquiv
+-/
 
+#print Homeomorph.trans_toHomotopyEquiv /-
 @[simp]
 theorem trans_toHomotopyEquiv (h₀ : X ≃ₜ Y) (h₁ : Y ≃ₜ Z) :
     (h₀.trans h₁).toHomotopyEquiv = h₀.toHomotopyEquiv.trans h₁.toHomotopyEquiv :=
   rfl
 #align homeomorph.trans_to_homotopy_equiv Homeomorph.trans_toHomotopyEquiv
+-/
 
 end Homeomorph

3d7987cd

bump to nightly-2023-02-21-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/bd9851ca476957ea4549eb19b40e7b5ade9428cc

1107b979

Changes in mathlib4

mathlib3

mathlib4

3d7987cd

chore: remove mathport name: <expression> lines (#11928)

Quoting [@digama0](https://github.com/digama0):

These were actually never meant to go in the file, they are basically debugging information and only useful on significantly broken mathport files. You can safely remove all of them.

11431c65

Diff

@@ -45,7 +45,6 @@ structure HomotopyEquiv (X : Type u) (Y : Type v) [TopologicalSpace X] [Topologi
   right_inv : (toFun.comp invFun).Homotopic (ContinuousMap.id Y)
 #align continuous_map.homotopy_equiv ContinuousMap.HomotopyEquiv
 
--- mathport name: continuous_map.homotopy_equiv
 scoped infixl:25 " ≃ₕ " => ContinuousMap.HomotopyEquiv
 
 namespace HomotopyEquiv

3d7987cd

chore(*): remove empty lines between variable statements (#11418)

Empty lines were removed by executing the following Python script twice

import os
import re


# Loop through each file in the repository
for dir_path, dirs, files in os.walk('.'):
  for filename in files:
    if filename.endswith('.lean'):
      file_path = os.path.join(dir_path, filename)

      # Open the file and read its contents
      with open(file_path, 'r') as file:
        content = file.read()

      # Use a regular expression to replace sequences of "variable" lines separated by empty lines
      # with sequences without empty lines
      modified_content = re.sub(r'(variable.*\n)\n(variable(?! .* in))', r'\1\2', content)

      # Write the modified content back to the file
      with open(file_path, 'w') as file:
        file.write(modified_content)

75c86f04

Diff

@@ -29,7 +29,6 @@ locale.
 universe u v w x
 
 variable {X : Type u} {Y : Type v} {Z : Type w} {Z' : Type x}
-
 variable [TopologicalSpace X] [TopologicalSpace Y] [TopologicalSpace Z] [TopologicalSpace Z']
 
 namespace ContinuousMap

3d7987cd

chore: classify todo porting notes (#11216)

Classifies by adding issue number #11215 to porting notes claiming "TODO".

86f95a40

Diff

@@ -54,7 +54,7 @@ namespace HomotopyEquiv
 /-- Coercion of a `HomotopyEquiv` to function. While the Lean 4 way is to unfold coercions, this
 auxiliary definition will make porting of Lean 3 code easier.
 
-Porting note: TODO: drop this definition. -/
+Porting note (#11215): TODO: drop this definition. -/
 @[coe] def toFun' (e : X ≃ₕ Y) : X → Y := e.toFun
 
 instance : CoeFun (X ≃ₕ Y) fun _ => X → Y := ⟨toFun'⟩

3d7987cd

chore: banish Type _ and Sort _ (#6499)

We remove all possible occurences of Type _ and Sort _ in favor of Type* and Sort*.

This has nice performance benefits.

32de3f67

Diff

@@ -169,7 +169,7 @@ def prodCongr (h₁ : X ≃ₕ Y) (h₂ : Z ≃ₕ Z') : (X × Z) ≃ₕ (Y × Z
 
 /-- If `X i` is homotopy equivalent to `Y i` for each `i`, then the space of functions (a.k.a. the
 indexed product) `∀ i, X i` is homotopy equivalent to `∀ i, Y i`. -/
-def piCongrRight {ι : Type _} {X Y : ι → Type _} [∀ i, TopologicalSpace (X i)]
+def piCongrRight {ι : Type*} {X Y : ι → Type*} [∀ i, TopologicalSpace (X i)]
     [∀ i, TopologicalSpace (Y i)] (h : ∀ i, X i ≃ₕ Y i) :
     (∀ i, X i) ≃ₕ (∀ i, Y i) where
   toFun := .piMap fun i ↦ (h i).toFun

3d7987cd

chore: script to replace headers with #align_import statements (#5979)

depends on: #5966

Co-authored-by: Eric Wieser <wieser.eric@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

89aa3a3b

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2021 Shing Tak Lam. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Shing Tak Lam
-
-! This file was ported from Lean 3 source module topology.homotopy.equiv
-! leanprover-community/mathlib commit 3d7987cda72abc473c7cdbbb075170e9ac620042
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Topology.Homotopy.Basic
 
+#align_import topology.homotopy.equiv from "leanprover-community/mathlib"@"3d7987cda72abc473c7cdbbb075170e9ac620042"
+
 /-!
 
 # Homotopy equivalences between topological spaces

3d7987cd

feat: add constructions about continuous map and homotopies (#2984)

Add ContinuousMap.fst, ContinuousMap.snd, ContinuousMap.eval, and ContinuousMap.piMap.
Add ContinuousMap.Homotopy.prodMk, ContinuousMap.Homotopy.prodMap, ContinuousMap.Homotopy.pi, ContinuousMap.Homotopy.piMap.
Add ContinuousMap.Homotopic.prodMk, ContinuousMap.Homotopic.prodMap, ContinuousMap.Homotopic.pi, ContinuousMap.Homotopic.piMap.
Add ContinuousMap.HomotopyEquiv.prodCongr and ContinuousMap.HomotopyEquiv.piCongrRight.

a51c8652

Diff

@@ -29,12 +29,11 @@ locale.
 
 -/
 
+universe u v w x
 
-universe u v w
+variable {X : Type u} {Y : Type v} {Z : Type w} {Z' : Type x}
 
-variable {X : Type u} {Y : Type v} {Z : Type w}
-
-variable [TopologicalSpace X] [TopologicalSpace Y] [TopologicalSpace Z]
+variable [TopologicalSpace X] [TopologicalSpace Y] [TopologicalSpace Z] [TopologicalSpace Z']
 
 namespace ContinuousMap
 
@@ -163,6 +162,24 @@ def trans (h₁ : X ≃ₕ Y) (h₂ : Y ≃ₕ Z) : X ≃ₕ Z where
 theorem symm_trans (h₁ : X ≃ₕ Y) (h₂ : Y ≃ₕ Z) : (h₁.trans h₂).symm = h₂.symm.trans h₁.symm := rfl
 #align continuous_map.homotopy_equiv.symm_trans ContinuousMap.HomotopyEquiv.symm_trans
 
+/-- If `X` is homotopy equivalent to `Y` and `Z` is homotopy equivalent to `Z'`, then `X × Z` is
+homotopy equivalent to `Z × Z'`. -/
+def prodCongr (h₁ : X ≃ₕ Y) (h₂ : Z ≃ₕ Z') : (X × Z) ≃ₕ (Y × Z') where
+  toFun := h₁.toFun.prodMap h₂.toFun
+  invFun := h₁.invFun.prodMap h₂.invFun
+  left_inv := h₁.left_inv.prodMap h₂.left_inv
+  right_inv := h₁.right_inv.prodMap h₂.right_inv
+
+/-- If `X i` is homotopy equivalent to `Y i` for each `i`, then the space of functions (a.k.a. the
+indexed product) `∀ i, X i` is homotopy equivalent to `∀ i, Y i`. -/
+def piCongrRight {ι : Type _} {X Y : ι → Type _} [∀ i, TopologicalSpace (X i)]
+    [∀ i, TopologicalSpace (Y i)] (h : ∀ i, X i ≃ₕ Y i) :
+    (∀ i, X i) ≃ₕ (∀ i, Y i) where
+  toFun := .piMap fun i ↦ (h i).toFun
+  invFun := .piMap fun i ↦ (h i).invFun
+  left_inv := .piMap fun i ↦ (h i).left_inv
+  right_inv := .piMap fun i ↦ (h i).right_inv
+
 end HomotopyEquiv
 
 end ContinuousMap

3d7987cd

feat: port Topology.Homotopy.Equiv (#2919)

Misc changes:

rename Homeomorph.symm_comp_to_continuousMap to Homeomorph.symm_comp_toContinuousMap;
rename Homeomorph.to_continuousMap_comp_symm to Homeomorph.toContinuousMap_comp_symm;
add CoeFun instance for Homeomorph; otherwise, toFun_eq_coe was stuck trying to coerce h to a function.

094cafa9

`topology.homotopy.equiv` ⟷ `Mathlib.Topology.Homotopy.Equiv`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 516

topology.homotopy.equiv ⟷ Mathlib.Topology.Homotopy.Equiv

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 516

`topology.homotopy.equiv` ⟷ `Mathlib.Topology.Homotopy.Equiv`