algebra.category.Module.images | 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

70fd9563

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

0b7c740e

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2022 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
-import Algebra.Category.Module.Abelian
+import Algebra.Category.ModuleCat.Abelian
 import CategoryTheory.Limits.Shapes.Images
 
 #align_import algebra.category.Module.images from "leanprover-community/mathlib"@"0b7c740e25651db0ba63648fbae9f9d6f941e31b"

0b7c740e

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) 2022 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
-import Mathbin.Algebra.Category.Module.Abelian
-import Mathbin.CategoryTheory.Limits.Shapes.Images
+import Algebra.Category.Module.Abelian
+import CategoryTheory.Limits.Shapes.Images
 
 #align_import algebra.category.Module.images from "leanprover-community/mathlib"@"0b7c740e25651db0ba63648fbae9f9d6f941e31b"

0b7c740e

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) 2022 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 algebra.category.Module.images
-! leanprover-community/mathlib commit 0b7c740e25651db0ba63648fbae9f9d6f941e31b
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Algebra.Category.Module.Abelian
 import Mathbin.CategoryTheory.Limits.Shapes.Images
 
+#align_import algebra.category.Module.images from "leanprover-community/mathlib"@"0b7c740e25651db0ba63648fbae9f9d6f941e31b"
+
 /-!
 # The category of R-modules has images.

0b7c740e

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -38,32 +38,41 @@ attribute [local ext] Subtype.ext_val
 
 section
 
+#print ModuleCat.image /-
 -- implementation details of `has_image` for Module; use the API, not these
 /-- The image of a morphism in `Module R` is just the bundling of `linear_map.range f` -/
 def image : ModuleCat R :=
   ModuleCat.of R (LinearMap.range f)
 #align Module.image ModuleCat.image
+-/
 
+#print ModuleCat.image.ι /-
 /-- The inclusion of `image f` into the target -/
 def image.ι : image f ⟶ H :=
   f.range.Subtype
 #align Module.image.ι ModuleCat.image.ι
+-/
 
 instance : Mono (image.ι f) :=
   ConcreteCategory.mono_of_injective (image.ι f) Subtype.val_injective
 
+#print ModuleCat.factorThruImage /-
 /-- The corestriction map to the image -/
 def factorThruImage : G ⟶ image f :=
   f.range_restrict
 #align Module.factor_thru_image ModuleCat.factorThruImage
+-/
 
+#print ModuleCat.image.fac /-
 theorem image.fac : factorThruImage f ≫ image.ι f = f := by ext; rfl
 #align Module.image.fac ModuleCat.image.fac
+-/
 
 attribute [local simp] image.fac
 
 variable {f}
 
+#print ModuleCat.image.lift /-
 /-- The universal property for the image factorisation -/
 noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     where
@@ -89,7 +98,9 @@ noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     rw [(Classical.indefiniteDescription (fun z => f z = _) _).2]
     rfl
 #align Module.image.lift ModuleCat.image.lift
+-/
 
+#print ModuleCat.image.lift_fac /-
 theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = image.ι f :=
   by
   ext x
@@ -97,9 +108,11 @@ theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = ima
   rw [F'.fac, (Classical.indefiniteDescription _ x.2).2]
   rfl
 #align Module.image.lift_fac ModuleCat.image.lift_fac
+-/
 
 end
 
+#print ModuleCat.monoFactorisation /-
 /-- The factorisation of any morphism in `Module R` through a mono. -/
 def monoFactorisation : MonoFactorisation f
     where
@@ -107,7 +120,9 @@ def monoFactorisation : MonoFactorisation f
   m := image.ι f
   e := factorThruImage f
 #align Module.mono_factorisation ModuleCat.monoFactorisation
+-/
 
+#print ModuleCat.isImage /-
 /-- The factorisation of any morphism in `Module R` through a mono has the universal property of
 the image. -/
 noncomputable def isImage : IsImage (monoFactorisation f)
@@ -115,7 +130,9 @@ noncomputable def isImage : IsImage (monoFactorisation f)
   lift := image.lift
   lift_fac := image.lift_fac
 #align Module.is_image ModuleCat.isImage
+-/
 
+#print ModuleCat.imageIsoRange /-
 /-- The categorical image of a morphism in `Module R`
 agrees with the linear algebraic range.
 -/
@@ -123,18 +140,23 @@ noncomputable def imageIsoRange {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     Limits.image f ≅ ModuleCat.of R f.range :=
   IsImage.isoExt (Image.isImage f) (isImage f)
 #align Module.image_iso_range ModuleCat.imageIsoRange
+-/
 
+#print ModuleCat.imageIsoRange_inv_image_ι /-
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).inv ≫ Limits.image.ι f = ModuleCat.ofHom f.range.Subtype :=
   IsImage.isoExt_inv_m _ _
 #align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ι
+-/
 
+#print ModuleCat.imageIsoRange_hom_subtype /-
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_hom_subtype {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).hom ≫ ModuleCat.ofHom f.range.Subtype = Limits.image.ι f := by
   erw [← image_iso_range_inv_image_ι f, iso.hom_inv_id_assoc]
 #align Module.image_iso_range_hom_subtype ModuleCat.imageIsoRange_hom_subtype
+-/
 
 end ModuleCat

0b7c740e

bump to nightly-2023-06-01-09

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

69164775

Diff

@@ -38,41 +38,32 @@ attribute [local ext] Subtype.ext_val
 
 section
 
-#print ModuleCat.image /-
 -- implementation details of `has_image` for Module; use the API, not these
 /-- The image of a morphism in `Module R` is just the bundling of `linear_map.range f` -/
 def image : ModuleCat R :=
   ModuleCat.of R (LinearMap.range f)
 #align Module.image ModuleCat.image
--/
 
-#print ModuleCat.image.ι /-
 /-- The inclusion of `image f` into the target -/
 def image.ι : image f ⟶ H :=
   f.range.Subtype
 #align Module.image.ι ModuleCat.image.ι
--/
 
 instance : Mono (image.ι f) :=
   ConcreteCategory.mono_of_injective (image.ι f) Subtype.val_injective
 
-#print ModuleCat.factorThruImage /-
 /-- The corestriction map to the image -/
 def factorThruImage : G ⟶ image f :=
   f.range_restrict
 #align Module.factor_thru_image ModuleCat.factorThruImage
--/
 
-#print ModuleCat.image.fac /-
 theorem image.fac : factorThruImage f ≫ image.ι f = f := by ext; rfl
 #align Module.image.fac ModuleCat.image.fac
--/
 
 attribute [local simp] image.fac
 
 variable {f}
 
-#print ModuleCat.image.lift /-
 /-- The universal property for the image factorisation -/
 noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     where
@@ -98,9 +89,7 @@ noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     rw [(Classical.indefiniteDescription (fun z => f z = _) _).2]
     rfl
 #align Module.image.lift ModuleCat.image.lift
--/
 
-#print ModuleCat.image.lift_fac /-
 theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = image.ι f :=
   by
   ext x
@@ -108,11 +97,9 @@ theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = ima
   rw [F'.fac, (Classical.indefiniteDescription _ x.2).2]
   rfl
 #align Module.image.lift_fac ModuleCat.image.lift_fac
--/
 
 end
 
-#print ModuleCat.monoFactorisation /-
 /-- The factorisation of any morphism in `Module R` through a mono. -/
 def monoFactorisation : MonoFactorisation f
     where
@@ -120,9 +107,7 @@ def monoFactorisation : MonoFactorisation f
   m := image.ι f
   e := factorThruImage f
 #align Module.mono_factorisation ModuleCat.monoFactorisation
--/
 
-#print ModuleCat.isImage /-
 /-- The factorisation of any morphism in `Module R` through a mono has the universal property of
 the image. -/
 noncomputable def isImage : IsImage (monoFactorisation f)
@@ -130,7 +115,6 @@ noncomputable def isImage : IsImage (monoFactorisation f)
   lift := image.lift
   lift_fac := image.lift_fac
 #align Module.is_image ModuleCat.isImage
--/
 
 /-- The categorical image of a morphism in `Module R`
 agrees with the linear algebraic range.
@@ -146,13 +130,11 @@ theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :
   IsImage.isoExt_inv_m _ _
 #align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ι
 
-#print ModuleCat.imageIsoRange_hom_subtype /-
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_hom_subtype {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).hom ≫ ModuleCat.ofHom f.range.Subtype = Limits.image.ι f := by
   erw [← image_iso_range_inv_image_ι f, iso.hom_inv_id_assoc]
 #align Module.image_iso_range_hom_subtype ModuleCat.imageIsoRange_hom_subtype
--/
 
 end ModuleCat

0b7c740e

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -132,9 +132,6 @@ noncomputable def isImage : IsImage (monoFactorisation f)
 #align Module.is_image ModuleCat.isImage
 -/
 
-/- warning: Module.image_iso_range -> ModuleCat.imageIsoRange is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align Module.image_iso_range ModuleCat.imageIsoRangeₓ'. -/
 /-- The categorical image of a morphism in `Module R`
 agrees with the linear algebraic range.
 -/
@@ -143,9 +140,6 @@ noncomputable def imageIsoRange {G H : ModuleCat.{v} R} (f : G ⟶ H) :
   IsImage.isoExt (Image.isImage f) (isImage f)
 #align Module.image_iso_range ModuleCat.imageIsoRange
 
-/- warning: Module.image_iso_range_inv_image_ι -> ModuleCat.imageIsoRange_inv_image_ι is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ιₓ'. -/
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).inv ≫ Limits.image.ι f = ModuleCat.ofHom f.range.Subtype :=

0b7c740e

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -64,10 +64,7 @@ def factorThruImage : G ⟶ image f :=
 -/
 
 #print ModuleCat.image.fac /-
-theorem image.fac : factorThruImage f ≫ image.ι f = f :=
-  by
-  ext
-  rfl
+theorem image.fac : factorThruImage f ≫ image.ι f = f := by ext; rfl
 #align Module.image.fac ModuleCat.image.fac
 -/

0b7c740e

bump to nightly-2023-05-28-03

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

6c6011cf

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 algebra.category.Module.images
-! leanprover-community/mathlib commit 70fd9563a21e7b963887c9360bd29b2393e6225a
+! leanprover-community/mathlib commit 0b7c740e25651db0ba63648fbae9f9d6f941e31b
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -14,6 +14,9 @@ import Mathbin.CategoryTheory.Limits.Shapes.Images
 /-!
 # The category of R-modules has images.
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 Note that we don't need to register any of the constructions here as instances, because we get them
 from the fact that `Module R` is an abelian category.
 -/
@@ -133,10 +136,7 @@ noncomputable def isImage : IsImage (monoFactorisation f)
 -/
 
 /- warning: Module.image_iso_range -> ModuleCat.imageIsoRange is a dubious translation:
-lean 3 declaration is
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 Case conversion may be inaccurate. Consider using '#align Module.image_iso_range ModuleCat.imageIsoRangeₓ'. -/
 /-- The categorical image of a morphism in `Module R`
 agrees with the linear algebraic range.
@@ -147,10 +147,7 @@ noncomputable def imageIsoRange {G H : ModuleCat.{v} R} (f : G ⟶ H) :
 #align Module.image_iso_range ModuleCat.imageIsoRange
 
 /- warning: Module.image_iso_range_inv_image_ι -> ModuleCat.imageIsoRange_inv_image_ι is a dubious translation:
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+<too large>
 Case conversion may be inaccurate. Consider using '#align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ιₓ'. -/
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :

70fd9563

bump to nightly-2023-05-26-10

mathlib commit https://github.com/leanprover-community/mathlib/commit/e1a18cad9cd462973d760af7de36b05776b8811c

7b06c533

Diff

@@ -35,35 +35,44 @@ attribute [local ext] Subtype.ext_val
 
 section
 
+#print ModuleCat.image /-
 -- implementation details of `has_image` for Module; use the API, not these
 /-- The image of a morphism in `Module R` is just the bundling of `linear_map.range f` -/
 def image : ModuleCat R :=
   ModuleCat.of R (LinearMap.range f)
 #align Module.image ModuleCat.image
+-/
 
+#print ModuleCat.image.ι /-
 /-- The inclusion of `image f` into the target -/
 def image.ι : image f ⟶ H :=
   f.range.Subtype
 #align Module.image.ι ModuleCat.image.ι
+-/
 
 instance : Mono (image.ι f) :=
   ConcreteCategory.mono_of_injective (image.ι f) Subtype.val_injective
 
+#print ModuleCat.factorThruImage /-
 /-- The corestriction map to the image -/
 def factorThruImage : G ⟶ image f :=
   f.range_restrict
 #align Module.factor_thru_image ModuleCat.factorThruImage
+-/
 
+#print ModuleCat.image.fac /-
 theorem image.fac : factorThruImage f ≫ image.ι f = f :=
   by
   ext
   rfl
 #align Module.image.fac ModuleCat.image.fac
+-/
 
 attribute [local simp] image.fac
 
 variable {f}
 
+#print ModuleCat.image.lift /-
 /-- The universal property for the image factorisation -/
 noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     where
@@ -89,7 +98,9 @@ noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.i
     rw [(Classical.indefiniteDescription (fun z => f z = _) _).2]
     rfl
 #align Module.image.lift ModuleCat.image.lift
+-/
 
+#print ModuleCat.image.lift_fac /-
 theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = image.ι f :=
   by
   ext x
@@ -97,9 +108,11 @@ theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = ima
   rw [F'.fac, (Classical.indefiniteDescription _ x.2).2]
   rfl
 #align Module.image.lift_fac ModuleCat.image.lift_fac
+-/
 
 end
 
+#print ModuleCat.monoFactorisation /-
 /-- The factorisation of any morphism in `Module R` through a mono. -/
 def monoFactorisation : MonoFactorisation f
     where
@@ -107,7 +120,9 @@ def monoFactorisation : MonoFactorisation f
   m := image.ι f
   e := factorThruImage f
 #align Module.mono_factorisation ModuleCat.monoFactorisation
+-/
 
+#print ModuleCat.isImage /-
 /-- The factorisation of any morphism in `Module R` through a mono has the universal property of
 the image. -/
 noncomputable def isImage : IsImage (monoFactorisation f)
@@ -115,7 +130,14 @@ noncomputable def isImage : IsImage (monoFactorisation f)
   lift := image.lift
   lift_fac := image.lift_fac
 #align Module.is_image ModuleCat.isImage
+-/
 
+/- warning: Module.image_iso_range -> ModuleCat.imageIsoRange is a dubious translation:
+lean 3 declaration is
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+but is expected to have type
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+Case conversion may be inaccurate. Consider using '#align Module.image_iso_range ModuleCat.imageIsoRangeₓ'. -/
 /-- The categorical image of a morphism in `Module R`
 agrees with the linear algebraic range.
 -/
@@ -124,17 +146,25 @@ noncomputable def imageIsoRange {G H : ModuleCat.{v} R} (f : G ⟶ H) :
   IsImage.isoExt (Image.isImage f) (isImage f)
 #align Module.image_iso_range ModuleCat.imageIsoRange
 
+/- warning: Module.image_iso_range_inv_image_ι -> ModuleCat.imageIsoRange_inv_image_ι is a dubious translation:
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+Case conversion may be inaccurate. Consider using '#align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ιₓ'. -/
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).inv ≫ Limits.image.ι f = ModuleCat.ofHom f.range.Subtype :=
   IsImage.isoExt_inv_m _ _
 #align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ι
 
+#print ModuleCat.imageIsoRange_hom_subtype /-
 @[simp, reassoc, elementwise]
 theorem imageIsoRange_hom_subtype {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).hom ≫ ModuleCat.ofHom f.range.Subtype = Limits.image.ι f := by
   erw [← image_iso_range_inv_image_ι f, iso.hom_inv_id_assoc]
 #align Module.image_iso_range_hom_subtype ModuleCat.imageIsoRange_hom_subtype
+-/
 
 end ModuleCat

70fd9563

bump to nightly-2023-05-23-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/75e7fca56381d056096ce5d05e938f63a6567828

ed98987c

Diff

@@ -124,13 +124,13 @@ noncomputable def imageIsoRange {G H : ModuleCat.{v} R} (f : G ⟶ H) :
   IsImage.isoExt (Image.isImage f) (isImage f)
 #align Module.image_iso_range ModuleCat.imageIsoRange
 
-@[simp, reassoc.1, elementwise]
+@[simp, reassoc, elementwise]
 theorem imageIsoRange_inv_image_ι {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).inv ≫ Limits.image.ι f = ModuleCat.ofHom f.range.Subtype :=
   IsImage.isoExt_inv_m _ _
 #align Module.image_iso_range_inv_image_ι ModuleCat.imageIsoRange_inv_image_ι
 
-@[simp, reassoc.1, elementwise]
+@[simp, reassoc, elementwise]
 theorem imageIsoRange_hom_subtype {G H : ModuleCat.{v} R} (f : G ⟶ H) :
     (imageIsoRange f).hom ≫ ModuleCat.ofHom f.range.Subtype = Limits.image.ι f := by
   erw [← image_iso_range_inv_image_ι f, iso.hom_inv_id_assoc]

70fd9563

bump to nightly-2023-03-07-20

mathlib commit https://github.com/leanprover-community/mathlib/commit/3b267e70a936eebb21ab546f49a8df34dd300b25

c0bba963

Diff

@@ -113,7 +113,7 @@ the image. -/
 noncomputable def isImage : IsImage (monoFactorisation f)
     where
   lift := image.lift
-  lift_fac' := image.lift_fac
+  lift_fac := image.lift_fac
 #align Module.is_image ModuleCat.isImage
 
 /-- The categorical image of a morphism in `Module R`

70fd9563

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

70fd9563

chore: adapt to multiple goal linter 3 (#12372)

A PR analogous to #12338 and #12361: reformatting proofs following the multiple goals linter of #12339.

d29b3780

Diff

@@ -63,13 +63,15 @@ variable {f}
 noncomputable def image.lift (F' : MonoFactorisation f) : image f ⟶ F'.I where
   toFun := (fun x => F'.e (Classical.indefiniteDescription _ x.2).1 : image f → F'.I)
   map_add' x y := by
-    apply (mono_iff_injective F'.m).1; infer_instance
+    apply (mono_iff_injective F'.m).1
+    · infer_instance
     rw [LinearMap.map_add]
     change (F'.e ≫ F'.m) _ = (F'.e ≫ F'.m) _ + (F'.e ≫ F'.m) _
     simp_rw [F'.fac, (Classical.indefiniteDescription (fun z => f z = _) _).2]
     rfl
   map_smul' c x := by
-    apply (mono_iff_injective F'.m).1; infer_instance
+    apply (mono_iff_injective F'.m).1
+    · infer_instance
     rw [LinearMap.map_smul]
     change (F'.e ≫ F'.m) _ = _ • (F'.e ≫ F'.m) _
     simp_rw [F'.fac, (Classical.indefiniteDescription (fun z => f z = _) _).2]

70fd9563

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

@@ -26,7 +26,6 @@ namespace ModuleCat
 set_option linter.uppercaseLean3 false -- `Module`
 
 variable {R : Type u} [Ring R]
-
 variable {G H : ModuleCat.{v} R} (f : G ⟶ H)
 
 attribute [local ext] Subtype.ext_val

70fd9563

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) 2022 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 algebra.category.Module.images
-! leanprover-community/mathlib commit 70fd9563a21e7b963887c9360bd29b2393e6225a
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Algebra.Category.ModuleCat.Abelian
 import Mathlib.CategoryTheory.Limits.Shapes.Images
 
+#align_import algebra.category.Module.images from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a"
+
 /-!
 # The category of R-modules has images.

70fd9563

chore: Remove commutativity assumption in ModuleCat.Images (#4543)

Change [CommRing R] to [Ring R] at the top of the file Mathlib.Algebra.Category.ModuleCat.Images.

54965d97

Diff

@@ -28,7 +28,7 @@ universe u v
 namespace ModuleCat
 set_option linter.uppercaseLean3 false -- `Module`
 
-variable {R : Type u} [CommRing R]
+variable {R : Type u} [Ring R]
 
 variable {G H : ModuleCat.{v} R} (f : G ⟶ H)

70fd9563

feat: port Algebra.Category.Module.Images (#4385)

4e6f5745

`algebra.category.Module.images` ⟷ `Mathlib.Algebra.Category.ModuleCat.Images`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 643

algebra.category.Module.images ⟷ Mathlib.Algebra.Category.ModuleCat.Images

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 643

`algebra.category.Module.images` ⟷ `Mathlib.Algebra.Category.ModuleCat.Images`