category_theory.preadditive.yoneda.projective ⟷ Mathlib.CategoryTheory.Preadditive.Yoneda.Projective

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

@@ -5,8 +5,8 @@ Authors: Markus Himmel, Scott Morrison
 -/
 import CategoryTheory.Preadditive.Yoneda.Basic
 import CategoryTheory.Preadditive.Projective
-import Algebra.Category.Group.EpiMono
-import Algebra.Category.Module.EpiMono
+import Algebra.Category.GroupCat.EpiMono
+import Algebra.Category.ModuleCat.EpiMono
 
 #align_import category_theory.preadditive.yoneda.projective from "leanprover-community/mathlib"@"bd15ff41b70f5e2cc210f26f25a8d5c53b20d3de"
 

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

@@ -3,10 +3,10 @@ Copyright (c) 2020 Markus Himmel. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Markus Himmel, Scott Morrison
 -/
-import Mathbin.CategoryTheory.Preadditive.Yoneda.Basic
-import Mathbin.CategoryTheory.Preadditive.Projective
-import Mathbin.Algebra.Category.Group.EpiMono
-import Mathbin.Algebra.Category.Module.EpiMono
+import CategoryTheory.Preadditive.Yoneda.Basic
+import CategoryTheory.Preadditive.Projective
+import Algebra.Category.Group.EpiMono
+import Algebra.Category.Module.EpiMono
 
 #align_import category_theory.preadditive.yoneda.projective from "leanprover-community/mathlib"@"bd15ff41b70f5e2cc210f26f25a8d5c53b20d3de"
 

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

@@ -2,17 +2,14 @@
 Copyright (c) 2020 Markus Himmel. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Markus Himmel, Scott Morrison
-
-! This file was ported from Lean 3 source module category_theory.preadditive.yoneda.projective
-! leanprover-community/mathlib commit bd15ff41b70f5e2cc210f26f25a8d5c53b20d3de
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Preadditive.Yoneda.Basic
 import Mathbin.CategoryTheory.Preadditive.Projective
 import Mathbin.Algebra.Category.Group.EpiMono
 import Mathbin.Algebra.Category.Module.EpiMono
 
+#align_import category_theory.preadditive.yoneda.projective from "leanprover-community/mathlib"@"bd15ff41b70f5e2cc210f26f25a8d5c53b20d3de"
+
 /-!
 > THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
 > Any changes to this file require a corresponding PR to mathlib4.

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

@@ -35,6 +35,7 @@ variable [Preadditive C]
 
 namespace Projective
 
+#print CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj /-
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms :=
   by
@@ -47,7 +48,9 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
   · intro
     exact (inferInstance : (preadditive_coyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj
+-/
 
+#print CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' /-
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyonedaObj (op P)).PreservesEpimorphisms :=
   by
@@ -60,6 +63,7 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' (P : C) :
   · intro
     exact (inferInstance : (preadditive_coyoneda_obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj'
+-/
 
 end Projective
 

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

@@ -35,12 +35,6 @@ variable [Preadditive C]
 
 namespace Projective
 
-/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj is a dubious translation:
-lean 3 declaration is
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (CategoryTheory.Functor.obj.{u1, max u2 u1, u2, max u1 u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P)))
-but is expected to have type
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
-Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_objₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms :=
   by
@@ -54,12 +48,6 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     exact (inferInstance : (preadditive_coyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj
 
-/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' is a dubious translation:
-lean 3 declaration is
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 (ModuleCat.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (ModuleCat.moduleCategory.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (CategoryTheory.preadditiveCoyonedaObj.{u1, u2} C _inst_1 _inst_2 (Opposite.op.{succ u2} C P)))
-but is expected to have type
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
-Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj'ₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyonedaObj (op P)).PreservesEpimorphisms :=
   by

mathlib commit https://github.com/leanprover-community/mathlib/commit/0b9eaaa7686280fad8cce467f5c3c57ee6ce77f8

@@ -54,13 +54,13 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     exact (inferInstance : (preadditive_coyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj
 
-/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' is a dubious translation:
+/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' is a dubious translation:
 lean 3 declaration is
   forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 (ModuleCat.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (ModuleCat.moduleCategory.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (CategoryTheory.preadditiveCoyonedaObj.{u1, u2} C _inst_1 _inst_2 (Opposite.op.{succ u2} C P)))
 but is expected to have type
   forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
-Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj'ₓ'. -/
-theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
+Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj'ₓ'. -/
+theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyonedaObj (op P)).PreservesEpimorphisms :=
   by
   rw [projective_iff_preserves_epimorphisms_coyoneda_obj]
@@ -71,7 +71,7 @@ theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
         (forget _)
   · intro
     exact (inferInstance : (preadditive_coyoneda_obj (op P) ⋙ forget _).PreservesEpimorphisms)
-#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj'
+#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj'
 
 end Projective
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/403190b5419b3f03f1a2893ad9352ca7f7d8bff6

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Markus Himmel, Scott Morrison
 
 ! This file was ported from Lean 3 source module category_theory.preadditive.yoneda.projective
-! leanprover-community/mathlib commit f8d8465c3c392a93b9ed226956e26dee00975946
+! leanprover-community/mathlib commit bd15ff41b70f5e2cc210f26f25a8d5c53b20d3de
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -14,6 +14,9 @@ import Mathbin.Algebra.Category.Group.EpiMono
 import Mathbin.Algebra.Category.Module.EpiMono
 
 /-!
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 An object is projective iff the preadditive coyoneda functor on it preserves epimorphisms.
 -/
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/2f8347015b12b0864dfaf366ec4909eb70c78740

@@ -36,7 +36,7 @@ namespace Projective
 lean 3 declaration is
   forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (CategoryTheory.Functor.obj.{u1, max u2 u1, u2, max u1 u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P)))
 but is expected to have type
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
 Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_objₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms :=
@@ -55,7 +55,7 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
 lean 3 declaration is
   forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 (ModuleCat.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (ModuleCat.moduleCategory.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (CategoryTheory.preadditiveCoyonedaObj.{u1, u2} C _inst_1 _inst_2 (Opposite.op.{succ u2} C P)))
 but is expected to have type
-  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} instAddCommGroupCatLargeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
 Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj'ₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyonedaObj (op P)).PreservesEpimorphisms :=

mathlib commit https://github.com/leanprover-community/mathlib/commit/28b2a92f2996d28e580450863c130955de0ed398

@@ -32,6 +32,12 @@ variable [Preadditive C]
 
 namespace Projective
 
+/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj is a dubious translation:
+lean 3 declaration is
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (CategoryTheory.Functor.obj.{u1, max u2 u1, u2, max u1 u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P)))
+but is expected to have type
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
+Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_objₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms :=
   by
@@ -45,6 +51,12 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     exact (inferInstance : (preadditive_coyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj
 
+/- warning: category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' -> CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' is a dubious translation:
+lean 3 declaration is
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 (ModuleCat.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (ModuleCat.moduleCategory.{u1, u1} (CategoryTheory.End.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1)) (Opposite.op.{succ u2} C P)) (CategoryTheory.Preadditive.CategoryTheory.End.ring.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Opposite.preadditive.{u2, u1} C _inst_1 _inst_2) (Opposite.op.{succ u2} C P))) (CategoryTheory.preadditiveCoyonedaObj.{u1, u2} C _inst_1 _inst_2 (Opposite.op.{succ u2} C P)))
+but is expected to have type
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] [_inst_2 : CategoryTheory.Preadditive.{u1, u2} C _inst_1] (P : C), Iff (CategoryTheory.Projective.{u1, u2} C _inst_1 P) (CategoryTheory.Functor.PreservesEpimorphisms.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1} (Prefunctor.obj.{succ u1, max (succ u2) (succ u1), u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.toCategoryStruct.{u1, u2} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1))) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.CategoryStruct.toQuiver.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Category.toCategoryStruct.{max u2 u1, max u2 (succ u1)} (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}))) (CategoryTheory.Functor.toPrefunctor.{u1, max u2 u1, u2, max u2 (succ u1)} (Opposite.{succ u2} C) (CategoryTheory.Category.opposite.{u1, u2} C _inst_1) (CategoryTheory.Functor.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.Functor.category.{u1, u1, u2, succ u1} C _inst_1 AddCommGroupCat.{u1} AddCommGroupCat.largeCategory.{u1}) (CategoryTheory.preadditiveCoyoneda.{u1, u2} C _inst_1 _inst_2)) (Opposite.op.{succ u2} C P)))
+Case conversion may be inaccurate. Consider using '#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj'ₓ'. -/
 theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyonedaObj (op P)).PreservesEpimorphisms :=
   by

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce11c3c2a285bbe6937e26d9792fda4e51f3fe1a

cherry-picked from #9347

Co-Authored-By: @digama0

@@ -6,7 +6,6 @@ Authors: Markus Himmel, Scott Morrison
 import Mathlib.CategoryTheory.Preadditive.Yoneda.Basic
 import Mathlib.CategoryTheory.Preadditive.Projective
 import Mathlib.Algebra.Category.GroupCat.EpiMono
-import Mathlib.Algebra.Category.ModuleCat.EpiMono
 
 #align_import category_theory.preadditive.yoneda.projective from "leanprover-community/mathlib"@"f8d8465c3c392a93b9ed226956e26dee00975946"
 

• depends on: #5966

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

@@ -2,17 +2,14 @@
 Copyright (c) 2020 Markus Himmel. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Markus Himmel, Scott Morrison
-
-! This file was ported from Lean 3 source module category_theory.preadditive.yoneda.projective
-! leanprover-community/mathlib commit f8d8465c3c392a93b9ed226956e26dee00975946
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.CategoryTheory.Preadditive.Yoneda.Basic
 import Mathlib.CategoryTheory.Preadditive.Projective
 import Mathlib.Algebra.Category.GroupCat.EpiMono
 import Mathlib.Algebra.Category.ModuleCat.EpiMono
 
+#align_import category_theory.preadditive.yoneda.projective from "leanprover-community/mathlib"@"f8d8465c3c392a93b9ed226956e26dee00975946"
+
 /-!
 An object is projective iff the preadditive coyoneda functor on it preserves epimorphisms.
 -/

Co-authored-by: Scott Morrison <scott.morrison@anu.edu.au> Co-authored-by: Parcly Taxel <reddeloostw@gmail.com>

@@ -32,7 +32,7 @@ variable [Preadditive C]
 
 namespace Projective
 
-theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C):
+theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms := by
   rw [projective_iff_preservesEpimorphisms_coyoneda_obj]
   refine' ⟨fun h : (preadditiveCoyoneda.obj (op P) ⋙

@@ -43,7 +43,7 @@ theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj (P : C):
     exact (inferInstance : (preadditiveCoyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
 #align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj
 
-theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
+theorem projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj' (P : C) :
     Projective P ↔ (preadditiveCoyoneda.obj (op P)).PreservesEpimorphisms := by
   rw [projective_iff_preservesEpimorphisms_coyoneda_obj]
   refine' ⟨fun h : (preadditiveCoyoneda.obj (op P) ⋙
@@ -52,7 +52,7 @@ theorem projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj' (P : C) :
         (forget _)
   · intro
     exact (inferInstance : (preadditiveCoyoneda.obj (op P) ⋙ forget _).PreservesEpimorphisms)
-#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditive_coyoneda_obj'
+#align category_theory.projective.projective_iff_preserves_epimorphisms_preadditive_coyoneda_obj' CategoryTheory.Projective.projective_iff_preservesEpimorphisms_preadditiveCoyoneda_obj'
 
 end Projective
 

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