category_theory.limits.constructions.binary_products

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

3424a593

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

f4758115

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,11 +3,11 @@ Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta, Andrew Yang
 -/
-import Mathbin.CategoryTheory.Limits.Shapes.Terminal
-import Mathbin.CategoryTheory.Limits.Shapes.Pullbacks
-import Mathbin.CategoryTheory.Limits.Shapes.BinaryProducts
-import Mathbin.CategoryTheory.Limits.Preserves.Shapes.Pullbacks
-import Mathbin.CategoryTheory.Limits.Preserves.Shapes.Terminal
+import CategoryTheory.Limits.Shapes.Terminal
+import CategoryTheory.Limits.Shapes.Pullbacks
+import CategoryTheory.Limits.Shapes.BinaryProducts
+import CategoryTheory.Limits.Preserves.Shapes.Pullbacks
+import CategoryTheory.Limits.Preserves.Shapes.Terminal
 
 #align_import category_theory.limits.constructions.binary_products from "leanprover-community/mathlib"@"f47581155c818e6361af4e4fda60d27d020c226b"

f4758115

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,11 +2,6 @@
 Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta, Andrew Yang
-
-! This file was ported from Lean 3 source module category_theory.limits.constructions.binary_products
-! leanprover-community/mathlib commit f47581155c818e6361af4e4fda60d27d020c226b
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Limits.Shapes.Terminal
 import Mathbin.CategoryTheory.Limits.Shapes.Pullbacks
@@ -14,6 +9,8 @@ import Mathbin.CategoryTheory.Limits.Shapes.BinaryProducts
 import Mathbin.CategoryTheory.Limits.Preserves.Shapes.Pullbacks
 import Mathbin.CategoryTheory.Limits.Preserves.Shapes.Terminal
 
+#align_import category_theory.limits.constructions.binary_products from "leanprover-community/mathlib"@"f47581155c818e6361af4e4fda60d27d020c226b"
+
 /-!
 # Constructing binary product from pullbacks and terminal object.

f4758115

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -33,6 +33,7 @@ open CategoryTheory CategoryTheory.Category CategoryTheory.Limits
 
 variable {C : Type u} [Category.{v} C] {D : Type u'} [Category.{v'} D] (F : C ⥤ D)
 
+#print isBinaryProductOfIsTerminalIsPullback /-
 /-- If a span is the pullback span over the terminal object, then it is a binary product. -/
 def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c : Cone F) {X : C}
     (hX : IsTerminal X) (f : F.obj ⟨WalkingPair.left⟩ ⟶ X) (g : F.obj ⟨WalkingPair.right⟩ ⟶ X)
@@ -59,6 +60,7 @@ def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c :
     exacts [(category.assoc _ _ _).symm.trans (hc.fac_assoc c' walking_cospan.left f).symm,
       (hc.fac c' walking_cospan.left).symm, (hc.fac c' walking_cospan.right).symm]
 #align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullback
+-/
 
 #print isProductOfIsTerminalIsPullback /-
 /-- The pullback over the terminal object is the product -/
@@ -144,6 +146,7 @@ noncomputable def prodIsoPullback [HasTerminal C] [HasPullbacks C] (X Y : C)
 #align prod_iso_pullback prodIsoPullback
 -/
 
+#print isBinaryCoproductOfIsInitialIsPushout /-
 /-- If a cospan is the pushout cospan under the initial object, then it is a binary coproduct. -/
 def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c : Cocone F) {X : C}
     (hX : IsInitial X) (f : X ⟶ F.obj ⟨WalkingPair.left⟩) (g : X ⟶ F.obj ⟨WalkingPair.right⟩)
@@ -172,6 +175,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
     exacts [(hc.fac c' walking_span.left).symm, (hc.fac c' walking_span.left).symm,
       (hc.fac c' walking_span.right).symm]
 #align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushout
+-/
 
 #print isCoproductOfIsInitialIsPushout /-
 /-- The pushout under the initial object is the coproduct -/

f4758115

bump to nightly-2023-06-01-16

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

b9c87c70

Diff

@@ -56,7 +56,7 @@ def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c :
     rw [← J, ← J]
     apply hc.hom_ext
     rintro (_ | (_ | _)) <;> simp only [pullback_cone.mk_π_app_one, pullback_cone.mk_π_app]
-    exacts[(category.assoc _ _ _).symm.trans (hc.fac_assoc c' walking_cospan.left f).symm,
+    exacts [(category.assoc _ _ _).symm.trans (hc.fac_assoc c' walking_cospan.left f).symm,
       (hc.fac c' walking_cospan.left).symm, (hc.fac c' walking_cospan.right).symm]
 #align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullback
 
@@ -169,7 +169,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
     rintro (_ | (_ | _)) <;>
       simp only [pushout_cocone.mk_ι_app_zero, pushout_cocone.mk_ι_app, category.assoc]
     congr 1
-    exacts[(hc.fac c' walking_span.left).symm, (hc.fac c' walking_span.left).symm,
+    exacts [(hc.fac c' walking_span.left).symm, (hc.fac c' walking_span.left).symm,
       (hc.fac c' walking_span.right).symm]
 #align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushout

f4758115

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -33,9 +33,6 @@ open CategoryTheory CategoryTheory.Category CategoryTheory.Limits
 
 variable {C : Type u} [Category.{v} C] {D : Type u'} [Category.{v'} D] (F : C ⥤ D)
 
-/- warning: is_binary_product_of_is_terminal_is_pullback -> isBinaryProductOfIsTerminalIsPullback is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullbackₓ'. -/
 /-- If a span is the pullback span over the terminal object, then it is a binary product. -/
 def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c : Cone F) {X : C}
     (hX : IsTerminal X) (f : F.obj ⟨WalkingPair.left⟩ ⟶ X) (g : F.obj ⟨WalkingPair.right⟩ ⟶ X)
@@ -147,9 +144,6 @@ noncomputable def prodIsoPullback [HasTerminal C] [HasPullbacks C] (X Y : C)
 #align prod_iso_pullback prodIsoPullback
 -/
 
-/- warning: is_binary_coproduct_of_is_initial_is_pushout -> isBinaryCoproductOfIsInitialIsPushout is a dubious translation:
-<too large>
-Case conversion may be inaccurate. Consider using '#align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushoutₓ'. -/
 /-- If a cospan is the pushout cospan under the initial object, then it is a binary coproduct. -/
 def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c : Cocone F) {X : C}
     (hX : IsInitial X) (f : X ⟶ F.obj ⟨WalkingPair.left⟩) (g : X ⟶ F.obj ⟨WalkingPair.right⟩)

f4758115

bump to nightly-2023-05-28-03

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

6c6011cf

Diff

@@ -34,10 +34,7 @@ open CategoryTheory CategoryTheory.Category CategoryTheory.Limits
 variable {C : Type u} [Category.{v} C] {D : Type u'} [Category.{v'} D] (F : C ⥤ D)
 
 /- warning: is_binary_product_of_is_terminal_is_pullback -> isBinaryProductOfIsTerminalIsPullback is a dubious translation:
-lean 3 declaration is
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(CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)
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+<too large>
 Case conversion may be inaccurate. Consider using '#align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullbackₓ'. -/
 /-- If a span is the pullback span over the terminal object, then it is a binary product. -/
 def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c : Cone F) {X : C}
@@ -151,10 +148,7 @@ noncomputable def prodIsoPullback [HasTerminal C] [HasPullbacks C] (X Y : C)
 -/
 
 /- warning: is_binary_coproduct_of_is_initial_is_pushout -> isBinaryCoproductOfIsInitialIsPushout is a dubious translation:
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CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Category.toCategoryStruct.{u1, max u2 u1} (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1))) (CategoryTheory.Functor.toPrefunctor.{u1, u1, u2, max u2 u1} C _inst_1 (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.const.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1)) (CategoryTheory.Limits.Cocone.pt.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)) (CategoryTheory.Limits.Cocone.ι.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)))))) -> (CategoryTheory.Limits.IsColimit.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)
+<too large>
 Case conversion may be inaccurate. Consider using '#align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushoutₓ'. -/
 /-- If a cospan is the pushout cospan under the initial object, then it is a binary coproduct. -/
 def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c : Cocone F) {X : C}

f4758115

bump to nightly-2023-03-09-03

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

061741a1

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta, Andrew Yang
 
 ! This file was ported from Lean 3 source module category_theory.limits.constructions.binary_products
-! leanprover-community/mathlib commit 3424a5932a77dcec2c177ce7d805acace6149299
+! leanprover-community/mathlib commit f47581155c818e6361af4e4fda60d27d020c226b
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -17,6 +17,9 @@ import Mathbin.CategoryTheory.Limits.Preserves.Shapes.Terminal
 /-!
 # Constructing binary product from pullbacks and terminal object.
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 The product is the pullback over the terminal objects. In particular, if a category
 has pullbacks and a terminal object, then it has binary products.

3424a593

bump to nightly-2023-03-07-20

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

c0bba963

Diff

@@ -30,6 +30,12 @@ open CategoryTheory CategoryTheory.Category CategoryTheory.Limits
 
 variable {C : Type u} [Category.{v} C] {D : Type u'} [Category.{v'} D] (F : C ⥤ D)
 
+/- warning: is_binary_product_of_is_terminal_is_pullback -> isBinaryProductOfIsTerminalIsPullback is a dubious translation:
+lean 3 declaration is
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] (F : CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (c : CategoryTheory.Limits.Cone.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) {X : C} (hX : CategoryTheory.Limits.IsTerminal.{u1, u2} C _inst_1 X) (f : Quiver.Hom.{succ u1, u2} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) X) (g : Quiver.Hom.{succ u1, u2} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) X), (CategoryTheory.Limits.IsLimit.{0, u1, 0, u2} CategoryTheory.Limits.WalkingCospan (CategoryTheory.Limits.WidePullbackShape.category.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 (CategoryTheory.Limits.cospan.{u1, u2} C _inst_1 (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) X f g) (CategoryTheory.Limits.PullbackCone.mk.{u1, u2} C _inst_1 (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) X f g (CategoryTheory.Functor.obj.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} 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(CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.const.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Limits.Cone.pt.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)) F (CategoryTheory.Limits.Cone.π.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) (isBinaryProductOfIsTerminalIsPullback._proof_1.{u2, u1} C _inst_1 F c X hX f g))) -> (CategoryTheory.Limits.IsLimit.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)
+but is expected to have type
+  forall {C : Type.{u2}} [_inst_1 : CategoryTheory.Category.{u1, u2} C] (F : CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (c : CategoryTheory.Limits.Cone.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) {X : C} (hX : CategoryTheory.Limits.IsTerminal.{u1, u2} C _inst_1 X) (f : Quiver.Hom.{succ u1, u2} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) X) (g : Quiver.Hom.{succ u1, u2} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) X), (CategoryTheory.Limits.IsLimit.{0, u1, 0, u2} CategoryTheory.Limits.WalkingCospan (CategoryTheory.Limits.WidePullbackShape.category.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 (CategoryTheory.Limits.cospan.{u1, u2} C _inst_1 (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)) X f g) (CategoryTheory.Limits.PullbackCone.mk.{u1, u2} C _inst_1 (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) (Prefunctor.obj.{1, succ u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.CategoryStruct.toQuiver.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.Category.toCategoryStruct.{0, 0} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair))) C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.toPrefunctor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} 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+Case conversion may be inaccurate. Consider using '#align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullbackₓ'. -/
 /-- If a span is the pullback span over the terminal object, then it is a binary product. -/
 def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c : Cone F) {X : C}
     (hX : IsTerminal X) (f : F.obj ⟨WalkingPair.left⟩ ⟶ X) (g : F.obj ⟨WalkingPair.right⟩ ⟶ X)
@@ -57,6 +63,7 @@ def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c :
       (hc.fac c' walking_cospan.left).symm, (hc.fac c' walking_cospan.right).symm]
 #align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullback
 
+#print isProductOfIsTerminalIsPullback /-
 /-- The pullback over the terminal object is the product -/
 def isProductOfIsTerminalIsPullback {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h : W ⟶ X) (k : W ⟶ Y)
     (H₁ : IsTerminal Z)
@@ -66,7 +73,9 @@ def isProductOfIsTerminalIsPullback {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h
   apply isBinaryProductOfIsTerminalIsPullback _ _ H₁
   exact H₂
 #align is_product_of_is_terminal_is_pullback isProductOfIsTerminalIsPullback
+-/
 
+#print isPullbackOfIsTerminalIsProduct /-
 /-- The product is the pullback over the terminal object. -/
 def isPullbackOfIsTerminalIsProduct {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h : W ⟶ X) (k : W ⟶ Y)
     (H₁ : IsTerminal Z) (H₂ : IsLimit (BinaryFan.mk h k)) :
@@ -83,7 +92,9 @@ def isPullbackOfIsTerminalIsProduct {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h
   · exact h₁.trans (H₂.fac (binary_fan.mk s.fst s.snd) ⟨walking_pair.left⟩).symm
   · exact h₂.trans (H₂.fac (binary_fan.mk s.fst s.snd) ⟨walking_pair.right⟩).symm
 #align is_pullback_of_is_terminal_is_product isPullbackOfIsTerminalIsProduct
+-/
 
+#print limitConeOfTerminalAndPullbacks /-
 /-- Any category with pullbacks and a terminal object has a limit cone for each walking pair. -/
 noncomputable def limitConeOfTerminalAndPullbacks [HasTerminal C] [HasPullbacks C]
     (F : Discrete WalkingPair ⥤ C) : LimitCone F
@@ -98,18 +109,22 @@ noncomputable def limitConeOfTerminalAndPullbacks [HasTerminal C] [HasPullbacks
   IsLimit :=
     isBinaryProductOfIsTerminalIsPullback F _ terminalIsTerminal _ _ (pullbackIsPullback _ _)
 #align limit_cone_of_terminal_and_pullbacks limitConeOfTerminalAndPullbacks
+-/
 
 variable (C)
 
+#print hasBinaryProducts_of_hasTerminal_and_pullbacks /-
 -- This is not an instance, as it is not always how one wants to construct binary products!
 /-- Any category with pullbacks and terminal object has binary products. -/
 theorem hasBinaryProducts_of_hasTerminal_and_pullbacks [HasTerminal C] [HasPullbacks C] :
     HasBinaryProducts C :=
   { HasLimit := fun F => HasLimit.mk (limitConeOfTerminalAndPullbacks F) }
 #align has_binary_products_of_has_terminal_and_pullbacks hasBinaryProducts_of_hasTerminal_and_pullbacks
+-/
 
 variable {C}
 
+#print preservesBinaryProductsOfPreservesTerminalAndPullbacks /-
 /-- A functor that preserves terminal objects and pullbacks preserves binary products. -/
 noncomputable def preservesBinaryProductsOfPreservesTerminalAndPullbacks [HasTerminal C]
     [HasPullbacks C] [PreservesLimitsOfShape (Discrete.{0} PEmpty) F]
@@ -121,14 +136,23 @@ noncomputable def preservesBinaryProductsOfPreservesTerminalAndPullbacks [HasTer
           isBinaryProductOfIsTerminalIsPullback _ _ (is_limit_of_has_terminal_of_preserves_limit F)
         apply is_limit_of_has_pullback_of_preserves_limit)⟩
 #align preserves_binary_products_of_preserves_terminal_and_pullbacks preservesBinaryProductsOfPreservesTerminalAndPullbacks
+-/
 
+#print prodIsoPullback /-
 /-- In a category with a terminal object and pullbacks,
 a product of objects `X` and `Y` is isomorphic to a pullback. -/
 noncomputable def prodIsoPullback [HasTerminal C] [HasPullbacks C] (X Y : C)
     [HasBinaryProduct X Y] : X ⨯ Y ≅ pullback (terminal.from X) (terminal.from Y) :=
   limit.isoLimitCone (limitConeOfTerminalAndPullbacks _)
 #align prod_iso_pullback prodIsoPullback
+-/
 
+/- warning: is_binary_coproduct_of_is_initial_is_pushout -> isBinaryCoproductOfIsInitialIsPushout is a dubious translation:
+lean 3 declaration is
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u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1))) (CategoryTheory.Functor.toPrefunctor.{u1, u1, u2, max u2 u1} C _inst_1 (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.const.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1)) (CategoryTheory.Limits.Cocone.pt.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c))) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.left)) g (CategoryTheory.NatTrans.app.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F (Prefunctor.obj.{succ u1, succ u1, u2, max u1 u2} C (CategoryTheory.CategoryStruct.toQuiver.{u1, u2} C (CategoryTheory.Category.toCategoryStruct.{u1, u2} C _inst_1)) (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.CategoryStruct.toQuiver.{u1, max u2 u1} (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Category.toCategoryStruct.{u1, max u2 u1} (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1))) (CategoryTheory.Functor.toPrefunctor.{u1, u1, u2, max u2 u1} C _inst_1 (CategoryTheory.Functor.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.category.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1) (CategoryTheory.Functor.const.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1)) (CategoryTheory.Limits.Cocone.pt.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)) (CategoryTheory.Limits.Cocone.ι.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c) (CategoryTheory.Discrete.mk.{0} CategoryTheory.Limits.WalkingPair CategoryTheory.Limits.WalkingPair.right)))))) -> (CategoryTheory.Limits.IsColimit.{0, u1, 0, u2} (CategoryTheory.Discrete.{0} CategoryTheory.Limits.WalkingPair) (CategoryTheory.discreteCategory.{0} CategoryTheory.Limits.WalkingPair) C _inst_1 F c)
+Case conversion may be inaccurate. Consider using '#align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushoutₓ'. -/
 /-- If a cospan is the pushout cospan under the initial object, then it is a binary coproduct. -/
 def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c : Cocone F) {X : C}
     (hX : IsInitial X) (f : X ⟶ F.obj ⟨WalkingPair.left⟩) (g : X ⟶ F.obj ⟨WalkingPair.right⟩)
@@ -158,6 +182,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
       (hc.fac c' walking_span.right).symm]
 #align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushout
 
+#print isCoproductOfIsInitialIsPushout /-
 /-- The pushout under the initial object is the coproduct -/
 def isCoproductOfIsInitialIsPushout {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h : W ⟶ X) (k : W ⟶ Y)
     (H₁ : IsInitial W)
@@ -167,7 +192,9 @@ def isCoproductOfIsInitialIsPushout {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h
   apply isBinaryCoproductOfIsInitialIsPushout _ _ H₁
   exact H₂
 #align is_coproduct_of_is_initial_is_pushout isCoproductOfIsInitialIsPushout
+-/
 
+#print isPushoutOfIsInitialIsCoproduct /-
 /-- The coproduct is the pushout under the initial object. -/
 def isPushoutOfIsInitialIsCoproduct {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h : W ⟶ X) (k : W ⟶ Y)
     (H₁ : IsInitial W) (H₂ : IsColimit (BinaryCofan.mk f g)) :
@@ -184,7 +211,9 @@ def isPushoutOfIsInitialIsCoproduct {W X Y Z : C} (f : X ⟶ Z) (g : Y ⟶ Z) (h
   · exact h₁.trans (H₂.fac (binary_cofan.mk s.inl s.inr) ⟨walking_pair.left⟩).symm
   · exact h₂.trans (H₂.fac (binary_cofan.mk s.inl s.inr) ⟨walking_pair.right⟩).symm
 #align is_pushout_of_is_initial_is_coproduct isPushoutOfIsInitialIsCoproduct
+-/
 
+#print colimitCoconeOfInitialAndPushouts /-
 /-- Any category with pushouts and an initial object has a colimit cocone for each walking pair. -/
 noncomputable def colimitCoconeOfInitialAndPushouts [HasInitial C] [HasPushouts C]
     (F : Discrete WalkingPair ⥤ C) : ColimitCocone F
@@ -196,18 +225,22 @@ noncomputable def colimitCoconeOfInitialAndPushouts [HasInitial C] [HasPushouts
           Discrete.casesOn x fun x => WalkingPair.casesOn x pushout.inl pushout.inr }
   IsColimit := isBinaryCoproductOfIsInitialIsPushout F _ initialIsInitial _ _ (pushoutIsPushout _ _)
 #align colimit_cocone_of_initial_and_pushouts colimitCoconeOfInitialAndPushouts
+-/
 
 variable (C)
 
+#print hasBinaryCoproducts_of_hasInitial_and_pushouts /-
 -- This is not an instance, as it is not always how one wants to construct binary coproducts!
 /-- Any category with pushouts and initial object has binary coproducts. -/
 theorem hasBinaryCoproducts_of_hasInitial_and_pushouts [HasInitial C] [HasPushouts C] :
     HasBinaryCoproducts C :=
   { HasColimit := fun F => HasColimit.mk (colimitCoconeOfInitialAndPushouts F) }
 #align has_binary_coproducts_of_has_initial_and_pushouts hasBinaryCoproducts_of_hasInitial_and_pushouts
+-/
 
 variable {C}
 
+#print preservesBinaryCoproductsOfPreservesInitialAndPushouts /-
 /-- A functor that preserves initial objects and pushouts preserves binary coproducts. -/
 noncomputable def preservesBinaryCoproductsOfPreservesInitialAndPushouts [HasInitial C]
     [HasPushouts C] [PreservesColimitsOfShape (Discrete.{0} PEmpty) F]
@@ -220,11 +253,14 @@ noncomputable def preservesBinaryCoproductsOfPreservesInitialAndPushouts [HasIni
             (is_colimit_of_has_initial_of_preserves_colimit F)
         apply is_colimit_of_has_pushout_of_preserves_colimit)⟩
 #align preserves_binary_coproducts_of_preserves_initial_and_pushouts preservesBinaryCoproductsOfPreservesInitialAndPushouts
+-/
 
+#print coprodIsoPushout /-
 /-- In a category with an initial object and pushouts,
 a coproduct of objects `X` and `Y` is isomorphic to a pushout. -/
 noncomputable def coprodIsoPushout [HasInitial C] [HasPushouts C] (X Y : C)
     [HasBinaryCoproduct X Y] : X ⨿ Y ≅ pushout (initial.to X) (initial.to Y) :=
   colimit.isoColimitCocone (colimitCoconeOfInitialAndPushouts _)
 #align coprod_iso_pushout coprodIsoPushout
+-/

3424a593

bump to nightly-2023-02-28-22

mathlib commit https://github.com/leanprover-community/mathlib/commit/9da1b3534b65d9661eb8f42443598a92bbb49211

1fb1623f

Diff

@@ -89,7 +89,7 @@ noncomputable def limitConeOfTerminalAndPullbacks [HasTerminal C] [HasPullbacks
     (F : Discrete WalkingPair ⥤ C) : LimitCone F
     where
   Cone :=
-    { x :=
+    { pt :=
         pullback (terminal.from (F.obj ⟨WalkingPair.left⟩))
           (terminal.from (F.obj ⟨WalkingPair.right⟩))
       π :=
@@ -190,7 +190,7 @@ noncomputable def colimitCoconeOfInitialAndPushouts [HasInitial C] [HasPushouts
     (F : Discrete WalkingPair ⥤ C) : ColimitCocone F
     where
   Cocone :=
-    { x := pushout (initial.to (F.obj ⟨WalkingPair.left⟩)) (initial.to (F.obj ⟨WalkingPair.right⟩))
+    { pt := pushout (initial.to (F.obj ⟨WalkingPair.left⟩)) (initial.to (F.obj ⟨WalkingPair.right⟩))
       ι :=
         Discrete.natTrans fun x =>
           Discrete.casesOn x fun x => WalkingPair.casesOn x pushout.inl pushout.inr }

3424a593

bump to nightly-2023-02-27-08

mathlib commit https://github.com/leanprover-community/mathlib/commit/eb0cb4511aaef0da2462207b67358a0e1fe1e2ee

91d8c210

Diff

@@ -42,10 +42,10 @@ def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c :
   lift s :=
     hc.lift
       (PullbackCone.mk (s.π.app ⟨WalkingPair.left⟩) (s.π.app ⟨WalkingPair.right⟩) (hX.hom_ext _ _))
-  fac' s j :=
+  fac s j :=
     Discrete.casesOn j fun j =>
       WalkingPair.casesOn j (hc.fac _ WalkingCospan.left) (hc.fac _ WalkingCospan.right)
-  uniq' s m J :=
+  uniq s m J :=
     by
     let c' :=
       pullback_cone.mk (m ≫ c.π.app ⟨walking_pair.left⟩) (m ≫ c.π.app ⟨walking_pair.right⟩ : _)
@@ -141,10 +141,10 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
   desc s :=
     hc.desc
       (PushoutCocone.mk (s.ι.app ⟨WalkingPair.left⟩) (s.ι.app ⟨WalkingPair.right⟩) (hX.hom_ext _ _))
-  fac' s j :=
+  fac s j :=
     Discrete.casesOn j fun j =>
       WalkingPair.casesOn j (hc.fac _ WalkingSpan.left) (hc.fac _ WalkingSpan.right)
-  uniq' s m J :=
+  uniq s m J :=
     by
     let c' :=
       pushout_cocone.mk (c.ι.app ⟨walking_pair.left⟩ ≫ m) (c.ι.app ⟨walking_pair.right⟩ ≫ m)

3424a593

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

3424a593

chore: adapt to multiple goal linter 1 (#12338)

A PR accompanying #12339.

Zulip discussion

45f93f3f

Diff

@@ -143,7 +143,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
     apply hc.hom_ext
     rintro (_ | (_ | _)) <;>
       simp only [PushoutCocone.mk_ι_app_zero, PushoutCocone.mk_ι_app, Category.assoc]
-    congr 1
+    on_goal 1 => congr 1
     exacts [(hc.fac c' WalkingSpan.left).symm, (hc.fac c' WalkingSpan.left).symm,
       (hc.fac c' WalkingSpan.right).symm]
 #align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushout

3424a593

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

@@ -2,11 +2,6 @@
 Copyright (c) 2020 Bhavik Mehta. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Bhavik Mehta, Andrew Yang
-
-! This file was ported from Lean 3 source module category_theory.limits.constructions.binary_products
-! leanprover-community/mathlib commit 3424a5932a77dcec2c177ce7d805acace6149299
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.CategoryTheory.Limits.Shapes.Terminal
 import Mathlib.CategoryTheory.Limits.Shapes.Pullbacks
@@ -14,6 +9,8 @@ import Mathlib.CategoryTheory.Limits.Shapes.BinaryProducts
 import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Pullbacks
 import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Terminal
 
+#align_import category_theory.limits.constructions.binary_products from "leanprover-community/mathlib"@"3424a5932a77dcec2c177ce7d805acace6149299"
+
 /-!
 # Constructing binary product from pullbacks and terminal object.

3424a593

chore: add space after exacts (#4945)

Too often tempted to change these during other PRs, so doing a mass edit here.

Co-authored-by: Scott Morrison <scott.morrison@anu.edu.au>

bf799bb9

Diff

@@ -49,7 +49,7 @@ def isBinaryProductOfIsTerminalIsPullback (F : Discrete WalkingPair ⥤ C) (c :
     dsimp; rw [← J, ← J]
     apply hc.hom_ext
     rintro (_ | (_ | _)) <;> simp only [PullbackCone.mk_π_app_one, PullbackCone.mk_π_app]
-    exacts[(Category.assoc _ _ _).symm.trans (hc.fac_assoc c' WalkingCospan.left f).symm,
+    exacts [(Category.assoc _ _ _).symm.trans (hc.fac_assoc c' WalkingCospan.left f).symm,
       (hc.fac c' WalkingCospan.left).symm, (hc.fac c' WalkingCospan.right).symm]
 #align is_binary_product_of_is_terminal_is_pullback isBinaryProductOfIsTerminalIsPullback
 
@@ -147,7 +147,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
     rintro (_ | (_ | _)) <;>
       simp only [PushoutCocone.mk_ι_app_zero, PushoutCocone.mk_ι_app, Category.assoc]
     congr 1
-    exacts[(hc.fac c' WalkingSpan.left).symm, (hc.fac c' WalkingSpan.left).symm,
+    exacts [(hc.fac c' WalkingSpan.left).symm, (hc.fac c' WalkingSpan.left).symm,
       (hc.fac c' WalkingSpan.right).symm]
 #align is_binary_coproduct_of_is_initial_is_pushout isBinaryCoproductOfIsInitialIsPushout

3424a593

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

@@ -138,8 +138,7 @@ def isBinaryCoproductOfIsInitialIsPushout (F : Discrete WalkingPair ⥤ C) (c :
   fac s j :=
     Discrete.casesOn j fun j =>
       WalkingPair.casesOn j (hc.fac _ WalkingSpan.left) (hc.fac _ WalkingSpan.right)
-  uniq s m J :=
-    by
+  uniq s m J := by
     let c' :=
       PushoutCocone.mk (c.ι.app ⟨WalkingPair.left⟩ ≫ m) (c.ι.app ⟨WalkingPair.right⟩ ≫ m)
         (hX.hom_ext (f ≫ _) (g ≫ _))
@@ -217,4 +216,3 @@ noncomputable def coprodIsoPushout [HasInitial C] [HasPushouts C] (X Y : C)
     [HasBinaryCoproduct X Y] : X ⨿ Y ≅ pushout (initial.to X) (initial.to Y) :=
   colimit.isoColimitCocone (colimitCoconeOfInitialAndPushouts _)
 #align coprod_iso_pushout coprodIsoPushout
-

3424a593

feat: port CategoryTheory.Limits.Constructions.BinaryProducts (#2699)

Co-authored-by: ChrisHughes24 <chrishughes24@gmail.com>

b66eff51

`category_theory.limits.constructions.binary_products` ⟷ `Mathlib.CategoryTheory.Limits.Constructions.BinaryProducts`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 113

category_theory.limits.constructions.binary_products ⟷ Mathlib.CategoryTheory.Limits.Constructions.BinaryProducts

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 113

`category_theory.limits.constructions.binary_products` ⟷ `Mathlib.CategoryTheory.Limits.Constructions.BinaryProducts`