category_theory.concrete_category.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

73dd4b54

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

69c6a5a1

bump to nightly-2024-04-14-09

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

f736ea6b

Diff

@@ -21,7 +21,7 @@ universe u
 
 namespace CategoryTheory
 
-instance : ReflectsIsomorphisms (forget (Type u)) where reflects X Y f i := i
+instance : CategoryTheory.Functor.ReflectsIsomorphisms (forget (Type u)) where reflects X Y f i := i
 
 variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
 
@@ -33,8 +33,9 @@ variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 /-- A `forget₂ C D` forgetful functor between concrete categories `C` and `D`
 where `forget C` reflects isomorphisms, itself reflects isomorphisms.
 -/
-theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms (forget C)] :
-    ReflectsIsomorphisms (forget₂ C D) :=
+theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D]
+    [CategoryTheory.Functor.ReflectsIsomorphisms (forget C)] :
+    CategoryTheory.Functor.ReflectsIsomorphisms (forget₂ C D) :=
   {
     reflects := fun X Y f i => by
       skip

69c6a5a1

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
 import CategoryTheory.ConcreteCategory.Basic
-import CategoryTheory.Functor.ReflectsIsomorphisms
+import CategoryTheory.Functor.ReflectsIso
 
 #align_import category_theory.concrete_category.reflects_isomorphisms from "leanprover-community/mathlib"@"69c6a5a12d8a2b159f20933e60115a4f2de62b58"

69c6a5a1

bump to nightly-2024-03-17-08

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

22f01ce4

Diff

@@ -42,7 +42,7 @@ theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms
       haveI : is_iso ((forget C).map f) :=
         by
         have := has_forget₂.forget_comp
-        dsimp at this 
+        dsimp at this
         rw [← this]
         exact i'
       apply is_iso_of_reflects_iso f (forget C) }

69c6a5a1

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,8 +3,8 @@ Copyright (c) 2020 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
-import Mathbin.CategoryTheory.ConcreteCategory.Basic
-import Mathbin.CategoryTheory.Functor.ReflectsIsomorphisms
+import CategoryTheory.ConcreteCategory.Basic
+import CategoryTheory.Functor.ReflectsIsomorphisms
 
 #align_import category_theory.concrete_category.reflects_isomorphisms from "leanprover-community/mathlib"@"69c6a5a12d8a2b159f20933e60115a4f2de62b58"

69c6a5a1

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,15 +2,12 @@
 Copyright (c) 2020 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
-
-! This file was ported from Lean 3 source module category_theory.concrete_category.reflects_isomorphisms
-! leanprover-community/mathlib commit 69c6a5a12d8a2b159f20933e60115a4f2de62b58
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.ConcreteCategory.Basic
 import Mathbin.CategoryTheory.Functor.ReflectsIsomorphisms
 
+#align_import category_theory.concrete_category.reflects_isomorphisms from "leanprover-community/mathlib"@"69c6a5a12d8a2b159f20933e60115a4f2de62b58"
+
 /-!
 > THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
 > Any changes to this file require a corresponding PR to mathlib4.

69c6a5a1

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -30,6 +30,7 @@ variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
 
 variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 
+#print CategoryTheory.reflectsIsomorphisms_forget₂ /-
 -- This should not be an instance, as it causes a typeclass loop
 -- with `category_theory.has_forget_to_Type`
 /-- A `forget₂ C D` forgetful functor between concrete categories `C` and `D`
@@ -49,6 +50,7 @@ theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms
         exact i'
       apply is_iso_of_reflects_iso f (forget C) }
 #align category_theory.reflects_isomorphisms_forget₂ CategoryTheory.reflectsIsomorphisms_forget₂
+-/
 
 end CategoryTheory

69c6a5a1

bump to nightly-2023-06-01-16

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

b9c87c70

Diff

@@ -44,7 +44,7 @@ theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms
       haveI : is_iso ((forget C).map f) :=
         by
         have := has_forget₂.forget_comp
-        dsimp at this
+        dsimp at this 
         rw [← this]
         exact i'
       apply is_iso_of_reflects_iso f (forget C) }

69c6a5a1

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -30,12 +30,6 @@ variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
 
 variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 
-/- warning: category_theory.reflects_isomorphisms_forget₂ -> CategoryTheory.reflectsIsomorphisms_forget₂ is a dubious translation:
-lean 3 declaration is
-  forall (C : Type.{succ u1}) [_inst_1 : CategoryTheory.Category.{u2, succ u1} C] [_inst_2 : CategoryTheory.ConcreteCategory.{u1, u2, succ u1} C _inst_1] (D : Type.{succ u1}) [_inst_3 : CategoryTheory.Category.{u3, succ u1} D] [_inst_4 : CategoryTheory.ConcreteCategory.{u1, u3, succ u1} D _inst_3] [_inst_5 : CategoryTheory.HasForget₂.{succ u1, succ u1, u1, u2, u3} C D _inst_1 _inst_2 _inst_3 _inst_4] [_inst_6 : CategoryTheory.ReflectsIsomorphisms.{u2, u1, succ u1, succ u1} C _inst_1 Type.{u1} CategoryTheory.types.{u1} (CategoryTheory.forget.{succ u1, u1, u2} C _inst_1 _inst_2)], CategoryTheory.ReflectsIsomorphisms.{u2, u3, succ u1, succ u1} C _inst_1 D _inst_3 (CategoryTheory.forget₂.{succ u1, succ u1, u2, u1, u3} C D _inst_1 _inst_2 _inst_3 _inst_4 _inst_5)
-but is expected to have type
-  forall (C : Type.{succ u3}) [_inst_1 : CategoryTheory.Category.{u2, succ u3} C] [_inst_2 : CategoryTheory.ConcreteCategory.{u3, u2, succ u3} C _inst_1] (D : Type.{succ u3}) [_inst_3 : CategoryTheory.Category.{u1, succ u3} D] [_inst_4 : CategoryTheory.ConcreteCategory.{u3, u1, succ u3} D _inst_3] [_inst_5 : CategoryTheory.HasForget₂.{succ u3, succ u3, u3, u2, u1} C D _inst_1 _inst_2 _inst_3 _inst_4] [_inst_6 : CategoryTheory.ReflectsIsomorphisms.{u2, u3, succ u3, succ u3} C _inst_1 Type.{u3} CategoryTheory.types.{u3} (CategoryTheory.forget.{succ u3, u3, u2} C _inst_1 _inst_2)], CategoryTheory.ReflectsIsomorphisms.{u2, u1, succ u3, succ u3} C _inst_1 D _inst_3 (CategoryTheory.forget₂.{succ u3, succ u3, u2, u3, u1} C D _inst_1 _inst_2 _inst_3 _inst_4 _inst_5)
-Case conversion may be inaccurate. Consider using '#align category_theory.reflects_isomorphisms_forget₂ CategoryTheory.reflectsIsomorphisms_forget₂ₓ'. -/
 -- This should not be an instance, as it causes a typeclass loop
 -- with `category_theory.has_forget_to_Type`
 /-- A `forget₂ C D` forgetful functor between concrete categories `C` and `D`

69c6a5a1

bump to nightly-2023-03-14-02

mathlib commit https://github.com/leanprover-community/mathlib/commit/2196ab363eb097c008d4497125e0dde23fb36db2

d4b38a42

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 
 ! This file was ported from Lean 3 source module category_theory.concrete_category.reflects_isomorphisms
-! leanprover-community/mathlib commit 73dd4b5411ec8fafb18a9d77c9c826907730af80
+! leanprover-community/mathlib commit 69c6a5a12d8a2b159f20933e60115a4f2de62b58
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -12,6 +12,9 @@ import Mathbin.CategoryTheory.ConcreteCategory.Basic
 import Mathbin.CategoryTheory.Functor.ReflectsIsomorphisms
 
 /-!
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 A `forget₂ C D` forgetful functor between concrete categories `C` and `D`
 whose forgetful functors both reflect isomorphisms, itself reflects isomorphisms.
 -/

73dd4b54

bump to nightly-2023-03-09-12

mathlib commit https://github.com/leanprover-community/mathlib/commit/21e3562c5e12d846c7def5eff8cdbc520d7d4936

ca1d663b

Diff

@@ -27,6 +27,12 @@ variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
 
 variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 
+/- warning: category_theory.reflects_isomorphisms_forget₂ -> CategoryTheory.reflectsIsomorphisms_forget₂ is a dubious translation:
+lean 3 declaration is
+  forall (C : Type.{succ u1}) [_inst_1 : CategoryTheory.Category.{u2, succ u1} C] [_inst_2 : CategoryTheory.ConcreteCategory.{u1, u2, succ u1} C _inst_1] (D : Type.{succ u1}) [_inst_3 : CategoryTheory.Category.{u3, succ u1} D] [_inst_4 : CategoryTheory.ConcreteCategory.{u1, u3, succ u1} D _inst_3] [_inst_5 : CategoryTheory.HasForget₂.{succ u1, succ u1, u1, u2, u3} C D _inst_1 _inst_2 _inst_3 _inst_4] [_inst_6 : CategoryTheory.ReflectsIsomorphisms.{u2, u1, succ u1, succ u1} C _inst_1 Type.{u1} CategoryTheory.types.{u1} (CategoryTheory.forget.{succ u1, u1, u2} C _inst_1 _inst_2)], CategoryTheory.ReflectsIsomorphisms.{u2, u3, succ u1, succ u1} C _inst_1 D _inst_3 (CategoryTheory.forget₂.{succ u1, succ u1, u2, u1, u3} C D _inst_1 _inst_2 _inst_3 _inst_4 _inst_5)
+but is expected to have type
+  forall (C : Type.{succ u3}) [_inst_1 : CategoryTheory.Category.{u2, succ u3} C] [_inst_2 : CategoryTheory.ConcreteCategory.{u3, u2, succ u3} C _inst_1] (D : Type.{succ u3}) [_inst_3 : CategoryTheory.Category.{u1, succ u3} D] [_inst_4 : CategoryTheory.ConcreteCategory.{u3, u1, succ u3} D _inst_3] [_inst_5 : CategoryTheory.HasForget₂.{succ u3, succ u3, u3, u2, u1} C D _inst_1 _inst_2 _inst_3 _inst_4] [_inst_6 : CategoryTheory.ReflectsIsomorphisms.{u2, u3, succ u3, succ u3} C _inst_1 Type.{u3} CategoryTheory.types.{u3} (CategoryTheory.forget.{succ u3, u3, u2} C _inst_1 _inst_2)], CategoryTheory.ReflectsIsomorphisms.{u2, u1, succ u3, succ u3} C _inst_1 D _inst_3 (CategoryTheory.forget₂.{succ u3, succ u3, u2, u3, u1} C D _inst_1 _inst_2 _inst_3 _inst_4 _inst_5)
+Case conversion may be inaccurate. Consider using '#align category_theory.reflects_isomorphisms_forget₂ CategoryTheory.reflectsIsomorphisms_forget₂ₓ'. -/
 -- This should not be an instance, as it causes a typeclass loop
 -- with `category_theory.has_forget_to_Type`
 /-- A `forget₂ C D` forgetful functor between concrete categories `C` and `D`

73dd4b54

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

73dd4b54

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

@@ -18,7 +18,7 @@ universe u
 
 namespace CategoryTheory
 
-instance : ReflectsIsomorphisms (forget (Type u)) where reflects _ _ _ {i} := i
+instance : (forget (Type u)).ReflectsIsomorphisms where reflects _ _ _ {i} := i
 
 variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
 variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
@@ -28,8 +28,8 @@ variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 /-- A `forget₂ C D` forgetful functor between concrete categories `C` and `D`
 where `forget C` reflects isomorphisms, itself reflects isomorphisms.
 -/
-theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms (forget C)] :
-    ReflectsIsomorphisms (forget₂ C D) :=
+theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [(forget C).ReflectsIsomorphisms] :
+    (forget₂ C D).ReflectsIsomorphisms :=
   { reflects := fun X Y f {i} => by
       haveI i' : IsIso ((forget D).map ((forget₂ C D).map f)) := Functor.map_isIso (forget D) _
       haveI : IsIso ((forget C).map f) := by

73dd4b54

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

@@ -21,7 +21,6 @@ namespace CategoryTheory
 instance : ReflectsIsomorphisms (forget (Type u)) where reflects _ _ _ {i} := i
 
 variable (C : Type (u + 1)) [Category C] [ConcreteCategory.{u} C]
-
 variable (D : Type (u + 1)) [Category D] [ConcreteCategory.{u} D]
 
 -- This should not be an instance, as it causes a typeclass loop

73dd4b54

chore: remove useless tactics (#11333)

The removal of some pointless tactics flagged by #11308.

ee18bf38

Diff

@@ -32,12 +32,10 @@ where `forget C` reflects isomorphisms, itself reflects isomorphisms.
 theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms (forget C)] :
     ReflectsIsomorphisms (forget₂ C D) :=
   { reflects := fun X Y f {i} => by
-      skip
       haveI i' : IsIso ((forget D).map ((forget₂ C D).map f)) := Functor.map_isIso (forget D) _
       haveI : IsIso ((forget C).map f) := by
         have := @HasForget₂.forget_comp C D
-        rw [← this]
-        exact i'
+        rwa [← this]
       apply isIso_of_reflects_iso f (forget C) }
 #align category_theory.reflects_isomorphisms_forget₂ CategoryTheory.reflectsIsomorphisms_forget₂

73dd4b54

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

@@ -2,15 +2,12 @@
 Copyright (c) 2020 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
-
-! This file was ported from Lean 3 source module category_theory.concrete_category.reflects_isomorphisms
-! leanprover-community/mathlib commit 73dd4b5411ec8fafb18a9d77c9c826907730af80
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.CategoryTheory.ConcreteCategory.Basic
 import Mathlib.CategoryTheory.Functor.ReflectsIso
 
+#align_import category_theory.concrete_category.reflects_isomorphisms from "leanprover-community/mathlib"@"73dd4b5411ec8fafb18a9d77c9c826907730af80"
+
 /-!
 A `forget₂ C D` forgetful functor between concrete categories `C` and `D`
 whose forgetful functors both reflect isomorphisms, itself reflects isomorphisms.

73dd4b54

chore: bye-bye, solo bys! (#3825)

This PR puts, with one exception, every single remaining by that lies all by itself on its own line to the previous line, thus matching the current behaviour of start-port.sh. The exception is when the by begins the second or later argument to a tuple or anonymous constructor; see https://github.com/leanprover-community/mathlib4/pull/3825#discussion_r1186702599.

Essentially this is s/\n *by$/ by/g, but with manual editing to satisfy the linter's max-100-char-line requirement. The Python style linter is also modified to catch these "isolated bys".

14167e48

Diff

@@ -37,8 +37,7 @@ theorem reflectsIsomorphisms_forget₂ [HasForget₂ C D] [ReflectsIsomorphisms
   { reflects := fun X Y f {i} => by
       skip
       haveI i' : IsIso ((forget D).map ((forget₂ C D).map f)) := Functor.map_isIso (forget D) _
-      haveI : IsIso ((forget C).map f) :=
-        by
+      haveI : IsIso ((forget C).map f) := by
         have := @HasForget₂.forget_comp C D
         rw [← this]
         exact i'

73dd4b54

feat: port CategoryTheory.ConcreteCategory.ReflectsIsomorphisms (#2739)

Co-authored-by: Moritz Firsching <firsching@google.com>

69108c78

`category_theory.concrete_category.reflects_isomorphisms` ⟷ `Mathlib.CategoryTheory.ConcreteCategory.ReflectsIso`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 114

category_theory.concrete_category.reflects_isomorphisms ⟷ Mathlib.CategoryTheory.ConcreteCategory.ReflectsIso

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 114

`category_theory.concrete_category.reflects_isomorphisms` ⟷ `Mathlib.CategoryTheory.ConcreteCategory.ReflectsIso`