algebraic_topology.fundamental_groupoid.product

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

178a3265

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

1a51edf1

bump to nightly-2024-04-06-08

mathlib commit https://github.com/leanprover-community/mathlib/commit/65a1391a0106c9204fe45bc73a039f056558cb83

e34029c9

Diff

@@ -5,7 +5,7 @@ Authors: Praneeth Kolichala
 -/
 import CategoryTheory.Groupoid
 import AlgebraicTopology.FundamentalGroupoid.Basic
-import Topology.Category.Top.Limits.Products
+import Topology.Category.TopCat.Limits.Products
 import Topology.Homotopy.Product
 
 #align_import algebraic_topology.fundamental_groupoid.product from "leanprover-community/mathlib"@"1a51edf13debfcbe223fa06b1cb353b9ed9751cc"

1a51edf1

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,10 +3,10 @@ Copyright (c) 2022 Praneeth Kolichala. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Praneeth Kolichala
 -/
-import Mathbin.CategoryTheory.Groupoid
-import Mathbin.AlgebraicTopology.FundamentalGroupoid.Basic
-import Mathbin.Topology.Category.Top.Limits.Products
-import Mathbin.Topology.Homotopy.Product
+import CategoryTheory.Groupoid
+import AlgebraicTopology.FundamentalGroupoid.Basic
+import Topology.Category.Top.Limits.Products
+import Topology.Homotopy.Product
 
 #align_import algebraic_topology.fundamental_groupoid.product from "leanprover-community/mathlib"@"1a51edf13debfcbe223fa06b1cb353b9ed9751cc"

1a51edf1

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,17 +2,14 @@
 Copyright (c) 2022 Praneeth Kolichala. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Praneeth Kolichala
-
-! This file was ported from Lean 3 source module algebraic_topology.fundamental_groupoid.product
-! leanprover-community/mathlib commit 1a51edf13debfcbe223fa06b1cb353b9ed9751cc
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Groupoid
 import Mathbin.AlgebraicTopology.FundamentalGroupoid.Basic
 import Mathbin.Topology.Category.Top.Limits.Products
 import Mathbin.Topology.Homotopy.Product
 
+#align_import algebraic_topology.fundamental_groupoid.product from "leanprover-community/mathlib"@"1a51edf13debfcbe223fa06b1cb353b9ed9751cc"
+
 /-!
 # Fundamental groupoid preserves products

1a51edf1

bump to nightly-2023-07-09-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/1a51edf13debfcbe223fa06b1cb353b9ed9751cc

e0217a15

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Praneeth Kolichala
 
 ! This file was ported from Lean 3 source module algebraic_topology.fundamental_groupoid.product
-! leanprover-community/mathlib commit 178a32653e369dce2da68dc6b2694e385d484ef1
+! leanprover-community/mathlib commit 1a51edf13debfcbe223fa06b1cb353b9ed9751cc
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -15,6 +15,9 @@ import Mathbin.Topology.Homotopy.Product
 
 /-!
 # Fundamental groupoid preserves products
+
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
 In this file, we give the following definitions/theorems:
 
   - `fundamental_groupoid_functor.pi_iso` An isomorphism between Π i, (π Xᵢ) and π (Πi, Xᵢ), whose

178a3265

bump to nightly-2023-07-07-07

mathlib commit https://github.com/leanprover-community/mathlib/commit/8905e5ed90859939681a725b00f6063e65096d95

4c9d7079

Diff

@@ -42,19 +42,24 @@ section Pi
 
 variable {I : Type u} (X : I → TopCat.{u})
 
+#print FundamentalGroupoidFunctor.proj /-
 /-- The projection map Π i, X i → X i induces a map π(Π i, X i) ⟶ π(X i).
 -/
 def proj (i : I) : πₓ (TopCat.of (∀ i, X i)) ⥤ πₓ (X i) :=
   πₘ ⟨_, continuous_apply i⟩
 #align fundamental_groupoid_functor.proj FundamentalGroupoidFunctor.proj
+-/
 
+#print FundamentalGroupoidFunctor.proj_map /-
 /-- The projection map is precisely path.homotopic.proj interpreted as a functor -/
 @[simp]
 theorem proj_map (i : I) (x₀ x₁ : πₓ (TopCat.of (∀ i, X i))) (p : x₀ ⟶ x₁) :
     (proj X i).map p = @Path.Homotopic.proj _ _ _ _ _ i p :=
   rfl
 #align fundamental_groupoid_functor.proj_map FundamentalGroupoidFunctor.proj_map
+-/
 
+#print FundamentalGroupoidFunctor.piToPiTop /-
 /-- The map taking the pi product of a family of fundamental groupoids to the fundamental
 groupoid of the pi product. This is actually an isomorphism (see `pi_iso`)
 -/
@@ -70,7 +75,9 @@ def piToPiTop : (∀ i, πₓ (X i)) ⥤ πₓ (TopCat.of (∀ i, X i))
     rfl
   map_comp' x y z f g := (Path.Homotopic.comp_pi_eq_pi_comp f g).symm
 #align fundamental_groupoid_functor.pi_to_pi_Top FundamentalGroupoidFunctor.piToPiTop
+-/
 
+#print FundamentalGroupoidFunctor.piIso /-
 /-- Shows `pi_to_pi_Top` is an isomorphism, whose inverse is precisely the pi product
 of the induced projections. This shows that `fundamental_groupoid_functor` preserves products.
 -/
@@ -92,33 +99,41 @@ def piIso : CategoryTheory.Grpd.of (∀ i : I, πₓ (X i)) ≅ πₓ (TopCat.of
       simp
     · rfl
 #align fundamental_groupoid_functor.pi_iso FundamentalGroupoidFunctor.piIso
+-/
 
 section Preserves
 
 open CategoryTheory
 
+#print FundamentalGroupoidFunctor.coneDiscreteComp /-
 /-- Equivalence between the categories of cones over the objects `π Xᵢ` written in two ways -/
 def coneDiscreteComp :
     Limits.Cone (Discrete.functor X ⋙ π) ≌ Limits.Cone (Discrete.functor fun i => πₓ (X i)) :=
   Limits.Cones.postcomposeEquivalence (Discrete.compNatIsoDiscrete X π)
 #align fundamental_groupoid_functor.cone_discrete_comp FundamentalGroupoidFunctor.coneDiscreteComp
+-/
 
+#print FundamentalGroupoidFunctor.coneDiscreteComp_obj_mapCone /-
 theorem coneDiscreteComp_obj_mapCone :
     (coneDiscreteComp X).Functor.obj (π.mapCone (TopCat.piFan.{u} X)) =
       Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) :=
   rfl
 #align fundamental_groupoid_functor.cone_discrete_comp_obj_map_cone FundamentalGroupoidFunctor.coneDiscreteComp_obj_mapCone
+-/
 
+#print FundamentalGroupoidFunctor.piTopToPiCone /-
 /-- This is `pi_iso.inv` as a cone morphism (in fact, isomorphism) -/
 def piTopToPiCone :
     Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) ⟶ Grpd.piLimitFan fun i : I => πₓ (X i)
     where Hom := CategoryTheory.Functor.pi' (proj X)
 #align fundamental_groupoid_functor.pi_Top_to_pi_cone FundamentalGroupoidFunctor.piTopToPiCone
+-/
 
 instance : IsIso (piTopToPiCone X) :=
   haveI : is_iso (pi_Top_to_pi_cone X).Hom := (inferInstance : is_iso (pi_iso X).inv)
   limits.cones.cone_iso_of_hom_iso (pi_Top_to_pi_cone X)
 
+#print FundamentalGroupoidFunctor.preservesProduct /-
 /-- The fundamental groupoid functor preserves products -/
 def preservesProduct : Limits.PreservesLimit (Discrete.functor X) π :=
   by
@@ -128,6 +143,7 @@ def preservesProduct : Limits.PreservesLimit (Discrete.functor X) π :=
   apply limits.is_limit.of_iso_limit _ (as_iso (pi_Top_to_pi_cone X)).symm
   exact Groupoid.pi_limit_fan_is_limit _
 #align fundamental_groupoid_functor.preserves_product FundamentalGroupoidFunctor.preservesProduct
+-/
 
 end Preserves
 
@@ -137,28 +153,37 @@ section Prod
 
 variable (A B : TopCat.{u})
 
+#print FundamentalGroupoidFunctor.projLeft /-
 /-- The induced map of the left projection map X × Y → X -/
 def projLeft : πₓ (TopCat.of (A × B)) ⥤ πₓ A :=
   πₘ ⟨_, continuous_fst⟩
 #align fundamental_groupoid_functor.proj_left FundamentalGroupoidFunctor.projLeft
+-/
 
+#print FundamentalGroupoidFunctor.projRight /-
 /-- The induced map of the right projection map X × Y → Y -/
 def projRight : πₓ (TopCat.of (A × B)) ⥤ πₓ B :=
   πₘ ⟨_, continuous_snd⟩
 #align fundamental_groupoid_functor.proj_right FundamentalGroupoidFunctor.projRight
+-/
 
+#print FundamentalGroupoidFunctor.projLeft_map /-
 @[simp]
 theorem projLeft_map (x₀ x₁ : πₓ (TopCat.of (A × B))) (p : x₀ ⟶ x₁) :
     (projLeft A B).map p = Path.Homotopic.projLeft p :=
   rfl
 #align fundamental_groupoid_functor.proj_left_map FundamentalGroupoidFunctor.projLeft_map
+-/
 
+#print FundamentalGroupoidFunctor.projRight_map /-
 @[simp]
 theorem projRight_map (x₀ x₁ : πₓ (TopCat.of (A × B))) (p : x₀ ⟶ x₁) :
     (projRight A B).map p = Path.Homotopic.projRight p :=
   rfl
 #align fundamental_groupoid_functor.proj_right_map FundamentalGroupoidFunctor.projRight_map
+-/
 
+#print FundamentalGroupoidFunctor.prodToProdTop /-
 /--
 The map taking the product of two fundamental groupoids to the fundamental groupoid of the product
 of the two topological spaces. This is in fact an isomorphism (see `prod_iso`).
@@ -179,13 +204,17 @@ def prodToProdTop : πₓ A × πₓ B ⥤ πₓ (TopCat.of (A × B))
     | (x₀, x₁), (y₀, y₁), (z₀, z₁), (f₀, f₁), (g₀, g₁) =>
       (Path.Homotopic.comp_prod_eq_prod_comp f₀ f₁ g₀ g₁).symm
 #align fundamental_groupoid_functor.prod_to_prod_Top FundamentalGroupoidFunctor.prodToProdTop
+-/
 
+#print FundamentalGroupoidFunctor.prodToProdTop_map /-
 theorem prodToProdTop_map {x₀ x₁ : πₓ A} {y₀ y₁ : πₓ B} (p₀ : x₀ ⟶ x₁) (p₁ : y₀ ⟶ y₁) :
     @CategoryTheory.Functor.map _ _ _ _ (prodToProdTop A B) (x₀, y₀) (x₁, y₁) (p₀, p₁) =
       Path.Homotopic.prod p₀ p₁ :=
   rfl
 #align fundamental_groupoid_functor.prod_to_prod_Top_map FundamentalGroupoidFunctor.prodToProdTop_map
+-/
 
+#print FundamentalGroupoidFunctor.prodIso /-
 /-- Shows `prod_to_prod_Top` is an isomorphism, whose inverse is precisely the product
 of the induced left and right projections.
 -/
@@ -209,6 +238,7 @@ def prodIso : CategoryTheory.Grpd.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (
     have := Path.Homotopic.prod_projLeft_projRight f
     simpa
 #align fundamental_groupoid_functor.prod_iso FundamentalGroupoidFunctor.prodIso
+-/
 
 end Prod

178a3265

bump to nightly-2023-06-01-16

mathlib commit https://github.com/leanprover-community/mathlib/commit/cca40788df1b8755d5baf17ab2f27dacc2e17acb

b9c87c70

Diff

@@ -197,14 +197,14 @@ def prodIso : CategoryTheory.Grpd.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (
   hom_inv_id' :=
     by
     change prod_to_prod_Top A B ⋙ (proj_left A B).prod' (proj_right A B) = 𝟭 _
-    apply CategoryTheory.Functor.hext; · intros ; ext <;> simp <;> rfl
+    apply CategoryTheory.Functor.hext; · intros; ext <;> simp <;> rfl
     rintro ⟨x₀, x₁⟩ ⟨y₀, y₁⟩ ⟨f₀, f₁⟩
     have := And.intro (Path.Homotopic.projLeft_prod f₀ f₁) (Path.Homotopic.projRight_prod f₀ f₁)
     simpa
   inv_hom_id' :=
     by
     change (proj_left A B).prod' (proj_right A B) ⋙ prod_to_prod_Top A B = 𝟭 _
-    apply CategoryTheory.Functor.hext; · intros ; ext <;> simp <;> rfl
+    apply CategoryTheory.Functor.hext; · intros; ext <;> simp <;> rfl
     rintro ⟨x₀, x₁⟩ ⟨y₀, y₁⟩ f
     have := Path.Homotopic.prod_projLeft_projRight f
     simpa

178a3265

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -34,7 +34,7 @@ noncomputable section
 
 namespace FundamentalGroupoidFunctor
 
-open FundamentalGroupoid
+open scoped FundamentalGroupoid
 
 universe u

178a3265

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -82,8 +82,7 @@ def piIso : CategoryTheory.Grpd.of (∀ i : I, πₓ (X i)) ≅ πₓ (TopCat.of
   hom_inv_id' := by
     change pi_to_pi_Top X ⋙ CategoryTheory.Functor.pi' (proj X) = 𝟭 _
     apply CategoryTheory.Functor.ext <;> intros
-    · ext
-      simp; · rfl
+    · ext; simp; · rfl
   inv_hom_id' := by
     change CategoryTheory.Functor.pi' (proj X) ⋙ pi_to_pi_Top X = 𝟭 _
     apply CategoryTheory.Functor.ext <;> intros
@@ -198,18 +197,14 @@ def prodIso : CategoryTheory.Grpd.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (
   hom_inv_id' :=
     by
     change prod_to_prod_Top A B ⋙ (proj_left A B).prod' (proj_right A B) = 𝟭 _
-    apply CategoryTheory.Functor.hext;
-    · intros
-      ext <;> simp <;> rfl
+    apply CategoryTheory.Functor.hext; · intros ; ext <;> simp <;> rfl
     rintro ⟨x₀, x₁⟩ ⟨y₀, y₁⟩ ⟨f₀, f₁⟩
     have := And.intro (Path.Homotopic.projLeft_prod f₀ f₁) (Path.Homotopic.projRight_prod f₀ f₁)
     simpa
   inv_hom_id' :=
     by
     change (proj_left A B).prod' (proj_right A B) ⋙ prod_to_prod_Top A B = 𝟭 _
-    apply CategoryTheory.Functor.hext;
-    · intros
-      ext <;> simp <;> rfl
+    apply CategoryTheory.Functor.hext; · intros ; ext <;> simp <;> rfl
     rintro ⟨x₀, x₁⟩ ⟨y₀, y₁⟩ f
     have := Path.Homotopic.prod_projLeft_projRight f
     simpa

178a3265

bump to nightly-2023-05-03-04

mathlib commit https://github.com/leanprover-community/mathlib/commit/36b8aa61ea7c05727161f96a0532897bd72aedab

fde4375d

Diff

@@ -75,7 +75,7 @@ def piToPiTop : (∀ i, πₓ (X i)) ⥤ πₓ (TopCat.of (∀ i, X i))
 of the induced projections. This shows that `fundamental_groupoid_functor` preserves products.
 -/
 @[simps]
-def piIso : CategoryTheory.GroupoidCat.of (∀ i : I, πₓ (X i)) ≅ πₓ (TopCat.of (∀ i, X i))
+def piIso : CategoryTheory.Grpd.of (∀ i : I, πₓ (X i)) ≅ πₓ (TopCat.of (∀ i, X i))
     where
   Hom := piToPiTop X
   inv := CategoryTheory.Functor.pi' (proj X)
@@ -112,8 +112,7 @@ theorem coneDiscreteComp_obj_mapCone :
 
 /-- This is `pi_iso.inv` as a cone morphism (in fact, isomorphism) -/
 def piTopToPiCone :
-    Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) ⟶
-      GroupoidCat.piLimitFan fun i : I => πₓ (X i)
+    Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) ⟶ Grpd.piLimitFan fun i : I => πₓ (X i)
     where Hom := CategoryTheory.Functor.pi' (proj X)
 #align fundamental_groupoid_functor.pi_Top_to_pi_cone FundamentalGroupoidFunctor.piTopToPiCone
 
@@ -192,7 +191,7 @@ theorem prodToProdTop_map {x₀ x₁ : πₓ A} {y₀ y₁ : πₓ B} (p₀ : x
 of the induced left and right projections.
 -/
 @[simps]
-def prodIso : CategoryTheory.GroupoidCat.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (A × B))
+def prodIso : CategoryTheory.Grpd.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (A × B))
     where
   Hom := prodToProdTop A B
   inv := (projLeft A B).prod' (projRight A B)

178a3265

bump to nightly-2023-04-27-02

mathlib commit https://github.com/leanprover-community/mathlib/commit/9b2b58d6b14b895b2f375108e765cb47de71aebd

5e92de8b

Diff

@@ -4,13 +4,13 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Praneeth Kolichala
 
 ! This file was ported from Lean 3 source module algebraic_topology.fundamental_groupoid.product
-! leanprover-community/mathlib commit 70fd9563a21e7b963887c9360bd29b2393e6225a
+! leanprover-community/mathlib commit 178a32653e369dce2da68dc6b2694e385d484ef1
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Groupoid
 import Mathbin.AlgebraicTopology.FundamentalGroupoid.Basic
-import Mathbin.Topology.Category.Top.Limits
+import Mathbin.Topology.Category.Top.Limits.Products
 import Mathbin.Topology.Homotopy.Product
 
 /-!

70fd9563

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

178a3265

fix: Fix FundamentalGroupoid being reducible. (#8257)

Instead it is now the opposite -- a structure with a single field.

zulip discussion

Co-authored-by: Adam Topaz <adamtopaz@users.noreply.github.com>

6b362d1e

Diff

@@ -54,18 +54,15 @@ theorem proj_map (i : I) (x₀ x₁ : πₓ (TopCat.of (∀ i, X i))) (p : x₀
   rfl
 #align fundamental_groupoid_functor.proj_map FundamentalGroupoidFunctor.proj_map
 
--- Porting note: losing the instance with a concrete category again
-instance : (i : I) → TopologicalSpace (πₓ (X i)).α := fun i => TopCat.topologicalSpace_coe (X i)
-
 /-- The map taking the pi product of a family of fundamental groupoids to the fundamental
 groupoid of the pi product. This is actually an isomorphism (see `piIso`)
 -/
 @[simps]
 def piToPiTop : (∀ i, πₓ (X i)) ⥤ πₓ (TopCat.of (∀ i, X i)) where
-  obj g := g
+  obj g := ⟨fun i => (g i).as⟩
   map p := Path.Homotopic.pi p
   map_id x := by
-    change (Path.Homotopic.pi fun i => 𝟙 (x i)) = _
+    change (Path.Homotopic.pi fun i => ⟦_⟧) = _
     simp only [FundamentalGroupoid.id_eq_path_refl, Path.Homotopic.pi_lift]
     rfl
   map_comp f g := (Path.Homotopic.comp_pi_eq_pi_comp f g).symm
@@ -167,7 +164,7 @@ of the two topological spaces. This is in fact an isomorphism (see `prodIso`).
 -/
 @[simps obj]
 def prodToProdTop : πₓ A × πₓ B ⥤ πₓ (TopCat.of (A × B)) where
-  obj g := g
+  obj g := ⟨g.fst.as, g.snd.as⟩
   map {x y} p :=
     match x, y, p with
     | (x₀, x₁), (y₀, y₁), (p₀, p₁) => @Path.Homotopic.prod _ _ (_) (_) _ _ _ _ p₀ p₁
@@ -205,7 +202,7 @@ def prodIso : CategoryTheory.Grpd.of (πₓ A × πₓ B) ≅ πₓ (TopCat.of (
   inv_hom_id := by
     change (projLeft A B).prod' (projRight A B) ⋙ prodToProdTop A B = 𝟭 _
     apply CategoryTheory.Functor.hext
-    · intros; apply Prod.ext <;> simp <;> rfl
+    · intros; apply FundamentalGroupoid.ext; apply Prod.ext <;> simp <;> rfl
     rintro ⟨x₀, x₁⟩ ⟨y₀, y₁⟩ f
     have := Path.Homotopic.prod_projLeft_projRight f
     -- Porting note: was simpa but TopSpace instances might be getting in the way

178a3265

chore: replace ConeMorphism.Hom by ConeMorphism.hom (#7176)

3e44bb07

Diff

@@ -114,11 +114,11 @@ theorem coneDiscreteComp_obj_mapCone :
 def piTopToPiCone :
     Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) ⟶ Grpd.piLimitFan fun i : I => πₓ (X i)
     where
-  Hom := CategoryTheory.Functor.pi' (proj X)
+  hom := CategoryTheory.Functor.pi' (proj X)
 #align fundamental_groupoid_functor.pi_Top_to_pi_cone FundamentalGroupoidFunctor.piTopToPiCone
 
 instance : IsIso (piTopToPiCone X) :=
-  haveI : IsIso (piTopToPiCone X).Hom := (inferInstance : IsIso (piIso X).inv)
+  haveI : IsIso (piTopToPiCone X).hom := (inferInstance : IsIso (piIso X).inv)
   Limits.Cones.cone_iso_of_hom_iso (piTopToPiCone X)
 
 /-- The fundamental groupoid functor preserves products -/

178a3265

chore: tidy various files (#7137)

cdbcc219

Diff

@@ -47,7 +47,7 @@ def proj (i : I) : πₓ (TopCat.of (∀ i, X i)) ⥤ πₓ (X i) :=
   πₘ ⟨_, continuous_apply i⟩
 #align fundamental_groupoid_functor.proj FundamentalGroupoidFunctor.proj
 
-/-- The projection map is precisely path.homotopic.proj interpreted as a functor -/
+/-- The projection map is precisely `Path.Homotopic.proj` interpreted as a functor -/
 @[simp]
 theorem proj_map (i : I) (x₀ x₁ : πₓ (TopCat.of (∀ i, X i))) (p : x₀ ⟶ x₁) :
     (proj X i).map p = @Path.Homotopic.proj _ _ _ _ _ i p :=
@@ -113,7 +113,8 @@ theorem coneDiscreteComp_obj_mapCone :
 /-- This is `piIso.inv` as a cone morphism (in fact, isomorphism) -/
 def piTopToPiCone :
     Limits.Fan.mk (πₓ (TopCat.of (∀ i, X i))) (proj X) ⟶ Grpd.piLimitFan fun i : I => πₓ (X i)
-    where Hom := CategoryTheory.Functor.pi' (proj X)
+    where
+  Hom := CategoryTheory.Functor.pi' (proj X)
 #align fundamental_groupoid_functor.pi_Top_to_pi_cone FundamentalGroupoidFunctor.piTopToPiCone
 
 instance : IsIso (piTopToPiCone X) :=

178a3265

chore: remove unused simps (#6632)

Co-authored-by: Eric Wieser <wieser.eric@gmail.com>

916c75c1

Diff

@@ -173,7 +173,6 @@ def prodToProdTop : πₓ A × πₓ B ⥤ πₓ (TopCat.of (A × B)) where
   map_id := by
     rintro ⟨x₀, x₁⟩
     simp only [CategoryTheory.prod_id, FundamentalGroupoid.id_eq_path_refl]
-    dsimp
     rfl
   map_comp {x y z} f g :=
     match x, y, z, f, g with

178a3265

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

@@ -2,17 +2,14 @@
 Copyright (c) 2022 Praneeth Kolichala. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Praneeth Kolichala
-
-! This file was ported from Lean 3 source module algebraic_topology.fundamental_groupoid.product
-! leanprover-community/mathlib commit 178a32653e369dce2da68dc6b2694e385d484ef1
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.CategoryTheory.Groupoid
 import Mathlib.AlgebraicTopology.FundamentalGroupoid.Basic
 import Mathlib.Topology.Category.TopCat.Limits.Products
 import Mathlib.Topology.Homotopy.Product
 
+#align_import algebraic_topology.fundamental_groupoid.product from "leanprover-community/mathlib"@"178a32653e369dce2da68dc6b2694e385d484ef1"
+
 /-!
 # Fundamental groupoid preserves products
 In this file, we give the following definitions/theorems:

178a3265

feat: port AlgebraicTopology.FundamentalGroupoid.Product (#5696)

Co-authored-by: Johan Commelin <johan@commelin.net> Co-authored-by: Matthew Ballard <matt@mrb.email>

0726e5e6

`algebraic_topology.fundamental_groupoid.product` ⟷ `Mathlib.AlgebraicTopology.FundamentalGroupoid.Product`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 660

algebraic_topology.fundamental_groupoid.product ⟷ Mathlib.AlgebraicTopology.FundamentalGroupoid.Product

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 10 + 660

`algebraic_topology.fundamental_groupoid.product` ⟷ `Mathlib.AlgebraicTopology.FundamentalGroupoid.Product`