category_theory.functor.reflects_isomorphisms

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

32253a1a

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

ef7acf40

bump to nightly-2024-04-14-09

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

f736ea6b

Diff

@@ -37,41 +37,43 @@ variable {D : Type u₂} [Category.{v₂} D]
 
 variable {E : Type u₃} [Category.{v₃} E]
 
-#print CategoryTheory.ReflectsIsomorphisms /-
+#print CategoryTheory.Functor.ReflectsIsomorphisms /-
 /-- Define what it means for a functor `F : C ⥤ D` to reflect isomorphisms: for any
 morphism `f : A ⟶ B`, if `F.map f` is an isomorphism then `f` is as well.
 Note that we do not assume or require that `F` is faithful.
 -/
-class ReflectsIsomorphisms (F : C ⥤ D) : Prop where
+class CategoryTheory.Functor.ReflectsIsomorphisms (F : C ⥤ D) : Prop where
   reflects : ∀ {A B : C} (f : A ⟶ B) [IsIso (F.map f)], IsIso f
-#align category_theory.reflects_isomorphisms CategoryTheory.ReflectsIsomorphisms
+#align category_theory.reflects_isomorphisms CategoryTheory.Functor.ReflectsIsomorphisms
 -/
 
 #print CategoryTheory.isIso_of_reflects_iso /-
 /-- If `F` reflects isos and `F.map f` is an iso, then `f` is an iso. -/
 theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.map f)]
-    [ReflectsIsomorphisms F] : IsIso f :=
-  ReflectsIsomorphisms.reflects F f
+    [CategoryTheory.Functor.ReflectsIsomorphisms F] : IsIso f :=
+  CategoryTheory.Functor.ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
 -/
 
 #print CategoryTheory.reflectsIsomorphisms_of_full_and_faithful /-
-instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful (F : C ⥤ D) [Full F]
-    [Faithful F] : ReflectsIsomorphisms F
+instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful (F : C ⥤ D)
+    [CategoryTheory.Functor.Full F] [CategoryTheory.Functor.Faithful F] :
+    CategoryTheory.Functor.ReflectsIsomorphisms F
     where reflects X Y f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
 #align category_theory.of_full_and_faithful CategoryTheory.reflectsIsomorphisms_of_full_and_faithful
 -/
 
-instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
-    ReflectsIsomorphisms (F ⋙ G) :=
+instance (F : C ⥤ D) (G : D ⥤ E) [CategoryTheory.Functor.ReflectsIsomorphisms F]
+    [CategoryTheory.Functor.ReflectsIsomorphisms G] :
+    CategoryTheory.Functor.ReflectsIsomorphisms (F ⋙ G) :=
   ⟨fun _ _ f (hf : IsIso (G.map _)) => by skip; haveI := is_iso_of_reflects_iso (F.map f) G;
     exact is_iso_of_reflects_iso f F⟩
 
 #print CategoryTheory.reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms /-
 instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms
     [Balanced C] (F : C ⥤ D) [ReflectsMonomorphisms F] [ReflectsEpimorphisms F] :
-    ReflectsIsomorphisms F
+    CategoryTheory.Functor.ReflectsIsomorphisms F
     where reflects A B f hf := by
     skip
     haveI : epi f := epi_of_epi_map F inferInstance

ef7acf40

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,9 +3,9 @@ Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta
 -/
-import Mathbin.CategoryTheory.Balanced
-import Mathbin.CategoryTheory.Functor.EpiMono
-import Mathbin.CategoryTheory.Functor.FullyFaithful
+import CategoryTheory.Balanced
+import CategoryTheory.Functor.EpiMono
+import CategoryTheory.Functor.FullyFaithful
 
 #align_import category_theory.functor.reflects_isomorphisms from "leanprover-community/mathlib"@"ef7acf407d265ad4081c8998687e994fa80ba70c"

ef7acf40

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,16 +2,13 @@
 Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta
-
-! This file was ported from Lean 3 source module category_theory.functor.reflects_isomorphisms
-! leanprover-community/mathlib commit ef7acf407d265ad4081c8998687e994fa80ba70c
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Balanced
 import Mathbin.CategoryTheory.Functor.EpiMono
 import Mathbin.CategoryTheory.Functor.FullyFaithful
 
+#align_import category_theory.functor.reflects_isomorphisms from "leanprover-community/mathlib"@"ef7acf407d265ad4081c8998687e994fa80ba70c"
+
 /-!
 # Functors which reflect isomorphisms

ef7acf40

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -50,11 +50,13 @@ class ReflectsIsomorphisms (F : C ⥤ D) : Prop where
 #align category_theory.reflects_isomorphisms CategoryTheory.ReflectsIsomorphisms
 -/
 
+#print CategoryTheory.isIso_of_reflects_iso /-
 /-- If `F` reflects isos and `F.map f` is an iso, then `f` is an iso. -/
 theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.map f)]
     [ReflectsIsomorphisms F] : IsIso f :=
   ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
+-/
 
 #print CategoryTheory.reflectsIsomorphisms_of_full_and_faithful /-
 instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful (F : C ⥤ D) [Full F]

ef7acf40

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -50,12 +50,6 @@ class ReflectsIsomorphisms (F : C ⥤ D) : Prop where
 #align category_theory.reflects_isomorphisms CategoryTheory.ReflectsIsomorphisms
 -/
 
-/- warning: category_theory.is_iso_of_reflects_iso -> CategoryTheory.isIso_of_reflects_iso is a dubious translation:
-lean 3 declaration is
-  forall {C : Type.{u3}} [_inst_1 : CategoryTheory.Category.{u1, u3} C] {D : Type.{u4}} [_inst_2 : CategoryTheory.Category.{u2, u4} D] {A : C} {B : C} (f : Quiver.Hom.{succ u1, u3} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) A B) (F : CategoryTheory.Functor.{u1, u2, u3, u4} C _inst_1 D _inst_2) [_inst_4 : CategoryTheory.IsIso.{u2, u4} D _inst_2 (CategoryTheory.Functor.obj.{u1, u2, u3, u4} C _inst_1 D _inst_2 F A) (CategoryTheory.Functor.obj.{u1, u2, u3, u4} C _inst_1 D _inst_2 F B) (CategoryTheory.Functor.map.{u1, u2, u3, u4} C _inst_1 D _inst_2 F A B f)] [_inst_5 : CategoryTheory.ReflectsIsomorphisms.{u1, u2, u3, u4} C _inst_1 D _inst_2 F], CategoryTheory.IsIso.{u1, u3} C _inst_1 A B f
-but is expected to have type
-  forall {C : Type.{u3}} [_inst_1 : CategoryTheory.Category.{u1, u3} C] {D : Type.{u4}} [_inst_2 : CategoryTheory.Category.{u2, u4} D] {A : C} {B : C} (f : Quiver.Hom.{succ u1, u3} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) A B) (F : CategoryTheory.Functor.{u1, u2, u3, u4} C _inst_1 D _inst_2) [_inst_4 : CategoryTheory.IsIso.{u2, u4} D _inst_2 (Prefunctor.obj.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) A) (Prefunctor.obj.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) B) (Prefunctor.map.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) A B f)] [_inst_5 : CategoryTheory.ReflectsIsomorphisms.{u1, u2, u3, u4} C _inst_1 D _inst_2 F], CategoryTheory.IsIso.{u1, u3} C _inst_1 A B f
-Case conversion may be inaccurate. Consider using '#align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_isoₓ'. -/
 /-- If `F` reflects isos and `F.map f` is an iso, then `f` is an iso. -/
 theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.map f)]
     [ReflectsIsomorphisms F] : IsIso f :=

ef7acf40

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -72,9 +72,7 @@ instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful (F : C ⥤
 
 instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
     ReflectsIsomorphisms (F ⋙ G) :=
-  ⟨fun _ _ f (hf : IsIso (G.map _)) => by
-    skip
-    haveI := is_iso_of_reflects_iso (F.map f) G
+  ⟨fun _ _ f (hf : IsIso (G.map _)) => by skip; haveI := is_iso_of_reflects_iso (F.map f) G;
     exact is_iso_of_reflects_iso f F⟩
 
 #print CategoryTheory.reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms /-

ef7acf40

bump to nightly-2023-04-21-14

mathlib commit https://github.com/leanprover-community/mathlib/commit/246f6f7989ff86bd07e1b014846f11304f33cf9e

f5635fc7

Diff

@@ -62,12 +62,12 @@ theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.ma
   ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
 
-#print CategoryTheory.of_full_and_faithful /-
-instance (priority := 100) of_full_and_faithful (F : C ⥤ D) [Full F] [Faithful F] :
-    ReflectsIsomorphisms F
+#print CategoryTheory.reflectsIsomorphisms_of_full_and_faithful /-
+instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful (F : C ⥤ D) [Full F]
+    [Faithful F] : ReflectsIsomorphisms F
     where reflects X Y f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
-#align category_theory.of_full_and_faithful CategoryTheory.of_full_and_faithful
+#align category_theory.of_full_and_faithful CategoryTheory.reflectsIsomorphisms_of_full_and_faithful
 -/
 
 instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :

ef7acf40

bump to nightly-2023-02-25-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/271bf175e6c51b8d31d6c0107b7bb4a967c7277e

39ef98db

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta
 
 ! This file was ported from Lean 3 source module category_theory.functor.reflects_isomorphisms
-! leanprover-community/mathlib commit bada07eeea7371537fcd9bc390724c0dc5eb4748
+! leanprover-community/mathlib commit ef7acf407d265ad4081c8998687e994fa80ba70c
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -15,6 +15,9 @@ import Mathbin.CategoryTheory.Functor.FullyFaithful
 /-!
 # Functors which reflect isomorphisms
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 A functor `F` reflects isomorphisms if whenever `F.map f` is an isomorphism, `f` was too.
 
 It is formalized as a `Prop` valued typeclass `reflects_isomorphisms F`.

bada07ee

bump to nightly-2023-02-23-18

mathlib commit https://github.com/leanprover-community/mathlib/commit/3ade05ac9447ae31a22d2ea5423435e054131240

3ce6456c

Diff

@@ -37,6 +37,7 @@ variable {D : Type u₂} [Category.{v₂} D]
 
 variable {E : Type u₃} [Category.{v₃} E]
 
+#print CategoryTheory.ReflectsIsomorphisms /-
 /-- Define what it means for a functor `F : C ⥤ D` to reflect isomorphisms: for any
 morphism `f : A ⟶ B`, if `F.map f` is an isomorphism then `f` is as well.
 Note that we do not assume or require that `F` is faithful.
@@ -44,18 +45,27 @@ Note that we do not assume or require that `F` is faithful.
 class ReflectsIsomorphisms (F : C ⥤ D) : Prop where
   reflects : ∀ {A B : C} (f : A ⟶ B) [IsIso (F.map f)], IsIso f
 #align category_theory.reflects_isomorphisms CategoryTheory.ReflectsIsomorphisms
+-/
 
+/- warning: category_theory.is_iso_of_reflects_iso -> CategoryTheory.isIso_of_reflects_iso is a dubious translation:
+lean 3 declaration is
+  forall {C : Type.{u3}} [_inst_1 : CategoryTheory.Category.{u1, u3} C] {D : Type.{u4}} [_inst_2 : CategoryTheory.Category.{u2, u4} D] {A : C} {B : C} (f : Quiver.Hom.{succ u1, u3} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) A B) (F : CategoryTheory.Functor.{u1, u2, u3, u4} C _inst_1 D _inst_2) [_inst_4 : CategoryTheory.IsIso.{u2, u4} D _inst_2 (CategoryTheory.Functor.obj.{u1, u2, u3, u4} C _inst_1 D _inst_2 F A) (CategoryTheory.Functor.obj.{u1, u2, u3, u4} C _inst_1 D _inst_2 F B) (CategoryTheory.Functor.map.{u1, u2, u3, u4} C _inst_1 D _inst_2 F A B f)] [_inst_5 : CategoryTheory.ReflectsIsomorphisms.{u1, u2, u3, u4} C _inst_1 D _inst_2 F], CategoryTheory.IsIso.{u1, u3} C _inst_1 A B f
+but is expected to have type
+  forall {C : Type.{u3}} [_inst_1 : CategoryTheory.Category.{u1, u3} C] {D : Type.{u4}} [_inst_2 : CategoryTheory.Category.{u2, u4} D] {A : C} {B : C} (f : Quiver.Hom.{succ u1, u3} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) A B) (F : CategoryTheory.Functor.{u1, u2, u3, u4} C _inst_1 D _inst_2) [_inst_4 : CategoryTheory.IsIso.{u2, u4} D _inst_2 (Prefunctor.obj.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) A) (Prefunctor.obj.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) B) (Prefunctor.map.{succ u1, succ u2, u3, u4} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u3} C (CategoryTheory.Category.toCategoryStruct.{u1, u3} C _inst_1)) D (CategoryTheory.CategoryStruct.toQuiver.{u2, u4} D (CategoryTheory.Category.toCategoryStruct.{u2, u4} D _inst_2)) (CategoryTheory.Functor.toPrefunctor.{u1, u2, u3, u4} C _inst_1 D _inst_2 F) A B f)] [_inst_5 : CategoryTheory.ReflectsIsomorphisms.{u1, u2, u3, u4} C _inst_1 D _inst_2 F], CategoryTheory.IsIso.{u1, u3} C _inst_1 A B f
+Case conversion may be inaccurate. Consider using '#align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_isoₓ'. -/
 /-- If `F` reflects isos and `F.map f` is an iso, then `f` is an iso. -/
 theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.map f)]
     [ReflectsIsomorphisms F] : IsIso f :=
   ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
 
+#print CategoryTheory.of_full_and_faithful /-
 instance (priority := 100) of_full_and_faithful (F : C ⥤ D) [Full F] [Faithful F] :
     ReflectsIsomorphisms F
     where reflects X Y f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
 #align category_theory.of_full_and_faithful CategoryTheory.of_full_and_faithful
+-/
 
 instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
     ReflectsIsomorphisms (F ⋙ G) :=
@@ -64,6 +74,7 @@ instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphi
     haveI := is_iso_of_reflects_iso (F.map f) G
     exact is_iso_of_reflects_iso f F⟩
 
+#print CategoryTheory.reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms /-
 instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms
     [Balanced C] (F : C ⥤ D) [ReflectsMonomorphisms F] [ReflectsEpimorphisms F] :
     ReflectsIsomorphisms F
@@ -73,6 +84,7 @@ instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_refl
     haveI : mono f := mono_of_mono_map F inferInstance
     exact is_iso_of_mono_of_epi f
 #align category_theory.reflects_isomorphisms_of_reflects_monomorphisms_of_reflects_epimorphisms CategoryTheory.reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms
+-/
 
 end ReflectsIso

bada07ee

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

32253a1a

chore(CategoryTheory): move Full, Faithful, EssSurj, IsEquivalence and ReflectsIsomorphisms to the Functor namespace (#11985)

These notions on functors are now Functor.Full, Functor.Faithful, Functor.EssSurj, Functor.IsEquivalence, Functor.ReflectsIsomorphisms. Deprecated aliases are introduced for the previous names.

65b7affc

Diff

@@ -37,34 +37,37 @@ variable {E : Type u₃} [Category.{v₃} E]
 morphism `f : A ⟶ B`, if `F.map f` is an isomorphism then `f` is as well.
 Note that we do not assume or require that `F` is faithful.
 -/
-class ReflectsIsomorphisms (F : C ⥤ D) : Prop where
+class Functor.ReflectsIsomorphisms (F : C ⥤ D) : Prop where
   /-- For any `f`, if `F.map f` is an iso, then so was `f`-/
   reflects : ∀ {A B : C} (f : A ⟶ B) [IsIso (F.map f)], IsIso f
-#align category_theory.reflects_isomorphisms CategoryTheory.ReflectsIsomorphisms
+#align category_theory.reflects_isomorphisms CategoryTheory.Functor.ReflectsIsomorphisms
+
+-- deprecated on 2024-04-06
+@[deprecated] alias ReflectsIsomorphisms := Functor.ReflectsIsomorphisms
 
 /-- If `F` reflects isos and `F.map f` is an iso, then `f` is an iso. -/
 theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.map f)]
-    [ReflectsIsomorphisms F] : IsIso f :=
+    [F.ReflectsIsomorphisms] : IsIso f :=
   ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
 
 instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful
-    (F : C ⥤ D) [Full F] [Faithful F] :
-    ReflectsIsomorphisms F where
+    (F : C ⥤ D) [F.Full] [F.Faithful] :
+    F.ReflectsIsomorphisms where
   reflects f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
 #align category_theory.of_full_and_faithful CategoryTheory.reflectsIsomorphisms_of_full_and_faithful
 
 instance reflectsIsomorphisms_of_comp (F : C ⥤ D) (G : D ⥤ E)
-    [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
-    ReflectsIsomorphisms (F ⋙ G) :=
+    [F.ReflectsIsomorphisms] [G.ReflectsIsomorphisms] :
+    (F ⋙ G).ReflectsIsomorphisms :=
   ⟨fun f (hf : IsIso (G.map _)) => by
     haveI := isIso_of_reflects_iso (F.map f) G
     exact isIso_of_reflects_iso f F⟩
 
 instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms
     [Balanced C] (F : C ⥤ D) [ReflectsMonomorphisms F] [ReflectsEpimorphisms F] :
-    ReflectsIsomorphisms F where
+    F.ReflectsIsomorphisms where
   reflects f hf := by
     haveI : Epi f := epi_of_epi_map F inferInstance
     haveI : Mono f := mono_of_mono_map F inferInstance

32253a1a

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

@@ -31,7 +31,6 @@ variable {C : Type u₁} [Category.{v₁} C]
 section ReflectsIso
 
 variable {D : Type u₂} [Category.{v₂} D]
-
 variable {E : Type u₃} [Category.{v₃} E]
 
 /-- Define what it means for a functor `F : C ⥤ D` to reflect isomorphisms: for any

32253a1a

style: fix wrapping of where (#7149)

084cfb35

Diff

@@ -51,8 +51,8 @@ theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.ma
 
 instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful
     (F : C ⥤ D) [Full F] [Faithful F] :
-    ReflectsIsomorphisms F
-    where reflects f i :=
+    ReflectsIsomorphisms F where
+  reflects f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
 #align category_theory.of_full_and_faithful CategoryTheory.reflectsIsomorphisms_of_full_and_faithful

32253a1a

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

@@ -2,16 +2,13 @@
 Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta
-
-! This file was ported from Lean 3 source module category_theory.functor.reflects_isomorphisms
-! leanprover-community/mathlib commit 32253a1a1071173b33dc7d6a218cf722c6feb514
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.CategoryTheory.Balanced
 import Mathlib.CategoryTheory.Functor.EpiMono
 import Mathlib.CategoryTheory.Functor.FullyFaithful
 
+#align_import category_theory.functor.reflects_isomorphisms from "leanprover-community/mathlib"@"32253a1a1071173b33dc7d6a218cf722c6feb514"
+
 /-!
 # Functors which reflect isomorphisms

32253a1a

feat: port AlgebraicTopology.DoldKan.NReflectsIso (#3548)

Co-authored-by: Parcly Taxel <reddeloostw@gmail.com> Co-authored-by: Jeremy Tan Jie Rui <reddeloostw@gmail.com>

506b8ae4

Diff

@@ -52,13 +52,15 @@ theorem isIso_of_reflects_iso {A B : C} (f : A ⟶ B) (F : C ⥤ D) [IsIso (F.ma
   ReflectsIsomorphisms.reflects F f
 #align category_theory.is_iso_of_reflects_iso CategoryTheory.isIso_of_reflects_iso
 
-instance (priority := 100) of_full_and_faithful (F : C ⥤ D) [Full F] [Faithful F] :
+instance (priority := 100) reflectsIsomorphisms_of_full_and_faithful
+    (F : C ⥤ D) [Full F] [Faithful F] :
     ReflectsIsomorphisms F
     where reflects f i :=
     ⟨⟨F.preimage (inv (F.map f)), ⟨F.map_injective (by simp), F.map_injective (by simp)⟩⟩⟩
-#align category_theory.of_full_and_faithful CategoryTheory.of_full_and_faithful
+#align category_theory.of_full_and_faithful CategoryTheory.reflectsIsomorphisms_of_full_and_faithful
 
-instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
+instance reflectsIsomorphisms_of_comp (F : C ⥤ D) (G : D ⥤ E)
+    [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
     ReflectsIsomorphisms (F ⋙ G) :=
   ⟨fun f (hf : IsIso (G.map _)) => by
     haveI := isIso_of_reflects_iso (F.map f) G

32253a1a

chore: tidy various files (#3530)

8cf71b01

Diff

@@ -61,7 +61,6 @@ instance (priority := 100) of_full_and_faithful (F : C ⥤ D) [Full F] [Faithful
 instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphisms G] :
     ReflectsIsomorphisms (F ⋙ G) :=
   ⟨fun f (hf : IsIso (G.map _)) => by
-    skip
     haveI := isIso_of_reflects_iso (F.map f) G
     exact isIso_of_reflects_iso f F⟩
 
@@ -69,7 +68,6 @@ instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_refl
     [Balanced C] (F : C ⥤ D) [ReflectsMonomorphisms F] [ReflectsEpimorphisms F] :
     ReflectsIsomorphisms F where
   reflects f hf := by
-    skip
     haveI : Epi f := epi_of_epi_map F inferInstance
     haveI : Mono f := mono_of_mono_map F inferInstance
     exact isIso_of_mono_of_epi f

32253a1a

chore: strip trailing spaces in lean files (#2828)

vscode is already configured by .vscode/settings.json to trim these on save. It's not clear how they've managed to stick around.

By doing this all in one PR now, it avoids getting random whitespace diffs in PRs later.

This was done with a regex search in vscode,

6ceb5945

Diff

@@ -67,7 +67,7 @@ instance (F : C ⥤ D) (G : D ⥤ E) [ReflectsIsomorphisms F] [ReflectsIsomorphi
 
 instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_reflectsEpimorphisms
     [Balanced C] (F : C ⥤ D) [ReflectsMonomorphisms F] [ReflectsEpimorphisms F] :
-    ReflectsIsomorphisms F where 
+    ReflectsIsomorphisms F where
   reflects f hf := by
     skip
     haveI : Epi f := epi_of_epi_map F inferInstance
@@ -78,4 +78,3 @@ instance (priority := 100) reflectsIsomorphisms_of_reflectsMonomorphisms_of_refl
 end ReflectsIso
 
 end CategoryTheory
-

32253a1a

feat: port CategoryTheory.Functor.ReflectsIsomorphisms (#2332)

Co-authored-by: Ruben Van de Velde <65514131+Ruben-VandeVelde@users.noreply.github.com> Co-authored-by: Matthew Ballard <matt@mrb.email> Co-authored-by: thorimur <68410468+thorimur@users.noreply.github.com>

14afbe96

`category_theory.functor.reflects_isomorphisms` ⟷ `Mathlib.CategoryTheory.Functor.ReflectsIso`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 58

category_theory.functor.reflects_isomorphisms ⟷ Mathlib.CategoryTheory.Functor.ReflectsIso

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 58

`category_theory.functor.reflects_isomorphisms` ⟷ `Mathlib.CategoryTheory.Functor.ReflectsIso`