topology.category.UniformSpace | 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

2a0ce625

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -6,7 +6,7 @@ Authors: Reid Barton, Patrick Massot, Scott Morrison
 import CategoryTheory.Adjunction.Reflective
 import CategoryTheory.ConcreteCategory.UnbundledHom
 import CategoryTheory.Monad.Limits
-import Topology.Category.Top.Basic
+import Topology.Category.TopCat.Basic
 import Topology.UniformSpace.Completion
 
 #align_import topology.category.UniformSpace from "leanprover-community/mathlib"@"2a0ce625dbb0ffbc7d1316597de0b25c1ec75303"

2a0ce625

bump to nightly-2024-03-17-08

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

22f01ce4

Diff

@@ -116,7 +116,7 @@ structure CpltSepUniformSpace where
   α : Type u
   [isUniformSpace : UniformSpace α]
   [is_completeSpace : CompleteSpace α]
-  [is_separated : SeparatedSpace α]
+  [is_separated : T0Space α]
 #align CpltSepUniformSpace CpltSepUniformSpace
 -/
 
@@ -140,29 +140,28 @@ instance completeSpace (X : CpltSepUniformSpace) : CompleteSpace (toUniformSpace
 #align CpltSepUniformSpace.complete_space CpltSepUniformSpace.completeSpace
 -/
 
-#print CpltSepUniformSpace.separatedSpace /-
-instance separatedSpace (X : CpltSepUniformSpace) : SeparatedSpace (toUniformSpace X).α :=
+#print CpltSepUniformSpace.t0Space /-
+instance t0Space (X : CpltSepUniformSpace) : T0Space (toUniformSpace X).α :=
   CpltSepUniformSpace.is_separated X
-#align CpltSepUniformSpace.separated_space CpltSepUniformSpace.separatedSpace
+#align CpltSepUniformSpace.separated_space CpltSepUniformSpace.t0Space
 -/
 
 #print CpltSepUniformSpace.of /-
 /-- Construct a bundled `UniformSpace` from the underlying type and the appropriate typeclasses. -/
-def of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] : CpltSepUniformSpace :=
+def of (X : Type u) [UniformSpace X] [CompleteSpace X] [T0Space X] : CpltSepUniformSpace :=
   ⟨X⟩
 #align CpltSepUniformSpace.of CpltSepUniformSpace.of
 -/
 
 #print CpltSepUniformSpace.coe_of /-
 @[simp]
-theorem coe_of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] :
-    (of X : Type u) = X :=
+theorem coe_of (X : Type u) [UniformSpace X] [CompleteSpace X] [T0Space X] : (of X : Type u) = X :=
   rfl
 #align CpltSepUniformSpace.coe_of CpltSepUniformSpace.coe_of
 -/
 
 instance : Inhabited CpltSepUniformSpace :=
-  haveI : SeparatedSpace Empty := separated_iff_t2.mpr (by infer_instance)
+  haveI : T0Space Empty := separated_iff_t2.mpr (by infer_instance)
   ⟨CpltSepUniformSpace.of Empty⟩
 
 #print CpltSepUniformSpace.category /-
@@ -258,9 +257,7 @@ noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace Unif
           left_inv := fun f => by dsimp; erw [extension_comp_coe]
           right_inv := fun f => by
             apply Subtype.eq; funext x; cases f
-            exact
-              @completion.extension_coe _ _ _ _ _ (CpltSepUniformSpace.separatedSpace _) f_property
-                _ }
+            exact @completion.extension_coe _ _ _ _ _ (CpltSepUniformSpace.t0Space _) f_property _ }
       homEquiv_naturality_left_symm := fun X X' Y f g =>
         by
         apply hom_ext; funext x; dsimp

2a0ce625

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) 2019 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Reid Barton, Patrick Massot, Scott Morrison
 -/
-import Mathbin.CategoryTheory.Adjunction.Reflective
-import Mathbin.CategoryTheory.ConcreteCategory.UnbundledHom
-import Mathbin.CategoryTheory.Monad.Limits
-import Mathbin.Topology.Category.Top.Basic
-import Mathbin.Topology.UniformSpace.Completion
+import CategoryTheory.Adjunction.Reflective
+import CategoryTheory.ConcreteCategory.UnbundledHom
+import CategoryTheory.Monad.Limits
+import Topology.Category.Top.Basic
+import Topology.UniformSpace.Completion
 
 #align_import topology.category.UniformSpace from "leanprover-community/mathlib"@"2a0ce625dbb0ffbc7d1316597de0b25c1ec75303"

2a0ce625

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) 2019 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Reid Barton, Patrick Massot, Scott Morrison
-
-! This file was ported from Lean 3 source module topology.category.UniformSpace
-! leanprover-community/mathlib commit 2a0ce625dbb0ffbc7d1316597de0b25c1ec75303
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.CategoryTheory.Adjunction.Reflective
 import Mathbin.CategoryTheory.ConcreteCategory.UnbundledHom
@@ -14,6 +9,8 @@ import Mathbin.CategoryTheory.Monad.Limits
 import Mathbin.Topology.Category.Top.Basic
 import Mathbin.Topology.UniformSpace.Completion
 
+#align_import topology.category.UniformSpace from "leanprover-community/mathlib"@"2a0ce625dbb0ffbc7d1316597de0b25c1ec75303"
+
 /-!
 # The category of uniform spaces

2a0ce625

bump to nightly-2023-06-18-23

mathlib commit https://github.com/leanprover-community/mathlib/commit/2a0ce625dbb0ffbc7d1316597de0b25c1ec75303

3b5e23dc

Diff

@@ -31,10 +31,12 @@ universe u
 
 open CategoryTheory
 
+#print UniformSpaceCat /-
 /-- A (bundled) uniform space. -/
 def UniformSpaceCat : Type (u + 1) :=
   Bundled UniformSpace
 #align UniformSpace UniformSpaceCat
+-/
 
 namespace UniformSpaceCat
 
@@ -50,42 +52,55 @@ instance : CoeSort UniformSpaceCat (Type _) :=
 instance (x : UniformSpaceCat) : UniformSpace x :=
   x.str
 
+#print UniformSpaceCat.of /-
 /-- Construct a bundled `UniformSpace` from the underlying type and the typeclass. -/
 def of (α : Type u) [UniformSpace α] : UniformSpaceCat :=
   ⟨α⟩
 #align UniformSpace.of UniformSpaceCat.of
+-/
 
 instance : Inhabited UniformSpaceCat :=
   ⟨UniformSpaceCat.of Empty⟩
 
+#print UniformSpaceCat.coe_of /-
 @[simp]
 theorem coe_of (X : Type u) [UniformSpace X] : (of X : Type u) = X :=
   rfl
 #align UniformSpace.coe_of UniformSpaceCat.coe_of
+-/
 
 instance (X Y : UniformSpaceCat) : CoeFun (X ⟶ Y) fun _ => X → Y :=
   ⟨CategoryTheory.Functor.map (forget UniformSpaceCat)⟩
 
+#print UniformSpaceCat.coe_comp /-
 @[simp]
 theorem coe_comp {X Y Z : UniformSpaceCat} (f : X ⟶ Y) (g : Y ⟶ Z) : (f ≫ g : X → Z) = g ∘ f :=
   rfl
 #align UniformSpace.coe_comp UniformSpaceCat.coe_comp
+-/
 
+#print UniformSpaceCat.coe_id /-
 @[simp]
 theorem coe_id (X : UniformSpaceCat) : (𝟙 X : X → X) = id :=
   rfl
 #align UniformSpace.coe_id UniformSpaceCat.coe_id
+-/
 
+#print UniformSpaceCat.coe_mk /-
 @[simp]
 theorem coe_mk {X Y : UniformSpaceCat} (f : X → Y) (hf : UniformContinuous f) :
     ((⟨f, hf⟩ : X ⟶ Y) : X → Y) = f :=
   rfl
 #align UniformSpace.coe_mk UniformSpaceCat.coe_mk
+-/
 
+#print UniformSpaceCat.hom_ext /-
 theorem hom_ext {X Y : UniformSpaceCat} {f g : X ⟶ Y} : (f : X → Y) = g → f = g :=
   Subtype.eq
 #align UniformSpace.hom_ext UniformSpaceCat.hom_ext
+-/
 
+#print UniformSpaceCat.hasForgetToTop /-
 /-- The forgetful functor from uniform spaces to topological spaces. -/
 instance hasForgetToTop : HasForget₂ UniformSpaceCat.{u} TopCat.{u}
     where forget₂ :=
@@ -94,9 +109,11 @@ instance hasForgetToTop : HasForget₂ UniformSpaceCat.{u} TopCat.{u}
         { toFun := f
           continuous_toFun := UniformContinuous.continuous f.property } }
 #align UniformSpace.has_forget_to_Top UniformSpaceCat.hasForgetToTop
+-/
 
 end UniformSpaceCat
 
+#print CpltSepUniformSpace /-
 /-- A (bundled) complete separated uniform space. -/
 structure CpltSepUniformSpace where
   α : Type u
@@ -104,6 +121,7 @@ structure CpltSepUniformSpace where
   [is_completeSpace : CompleteSpace α]
   [is_separated : SeparatedSpace α]
 #align CpltSepUniformSpace CpltSepUniformSpace
+-/
 
 namespace CpltSepUniformSpace
 
@@ -112,47 +130,63 @@ instance : CoeSort CpltSepUniformSpace (Type u) :=
 
 attribute [instance] is_uniform_space is_complete_space is_separated
 
+#print CpltSepUniformSpace.toUniformSpace /-
 /-- The function forgetting that a complete separated uniform spaces is complete and separated. -/
 def toUniformSpace (X : CpltSepUniformSpace) : UniformSpaceCat :=
   UniformSpaceCat.of X
 #align CpltSepUniformSpace.to_UniformSpace CpltSepUniformSpace.toUniformSpace
+-/
 
+#print CpltSepUniformSpace.completeSpace /-
 instance completeSpace (X : CpltSepUniformSpace) : CompleteSpace (toUniformSpace X).α :=
   CpltSepUniformSpace.is_completeSpace X
 #align CpltSepUniformSpace.complete_space CpltSepUniformSpace.completeSpace
+-/
 
+#print CpltSepUniformSpace.separatedSpace /-
 instance separatedSpace (X : CpltSepUniformSpace) : SeparatedSpace (toUniformSpace X).α :=
   CpltSepUniformSpace.is_separated X
 #align CpltSepUniformSpace.separated_space CpltSepUniformSpace.separatedSpace
+-/
 
+#print CpltSepUniformSpace.of /-
 /-- Construct a bundled `UniformSpace` from the underlying type and the appropriate typeclasses. -/
 def of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] : CpltSepUniformSpace :=
   ⟨X⟩
 #align CpltSepUniformSpace.of CpltSepUniformSpace.of
+-/
 
+#print CpltSepUniformSpace.coe_of /-
 @[simp]
 theorem coe_of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] :
     (of X : Type u) = X :=
   rfl
 #align CpltSepUniformSpace.coe_of CpltSepUniformSpace.coe_of
+-/
 
 instance : Inhabited CpltSepUniformSpace :=
   haveI : SeparatedSpace Empty := separated_iff_t2.mpr (by infer_instance)
   ⟨CpltSepUniformSpace.of Empty⟩
 
+#print CpltSepUniformSpace.category /-
 /-- The category instance on `CpltSepUniformSpace`. -/
 instance category : LargeCategory CpltSepUniformSpace :=
   InducedCategory.category toUniformSpace
 #align CpltSepUniformSpace.category CpltSepUniformSpace.category
+-/
 
+#print CpltSepUniformSpace.concreteCategory /-
 /-- The concrete category instance on `CpltSepUniformSpace`. -/
 instance concreteCategory : ConcreteCategory CpltSepUniformSpace :=
   InducedCategory.concreteCategory toUniformSpace
 #align CpltSepUniformSpace.concrete_category CpltSepUniformSpace.concreteCategory
+-/
 
+#print CpltSepUniformSpace.hasForgetToUniformSpace /-
 instance hasForgetToUniformSpace : HasForget₂ CpltSepUniformSpace UniformSpaceCat :=
   InducedCategory.hasForget₂ toUniformSpace
 #align CpltSepUniformSpace.has_forget_to_UniformSpace CpltSepUniformSpace.hasForgetToUniformSpace
+-/
 
 end CpltSepUniformSpace
 
@@ -162,6 +196,7 @@ open UniformSpace
 
 open CpltSepUniformSpace
 
+#print UniformSpaceCat.completionFunctor /-
 /-- The functor turning uniform spaces into complete separated uniform spaces. -/
 noncomputable def completionFunctor : UniformSpaceCat ⥤ CpltSepUniformSpace
     where
@@ -170,7 +205,9 @@ noncomputable def completionFunctor : UniformSpaceCat ⥤ CpltSepUniformSpace
   map_id' X := Subtype.eq Completion.map_id
   map_comp' X Y Z f g := Subtype.eq (Completion.map_comp g.property f.property).symm
 #align UniformSpace.completion_functor UniformSpaceCat.completionFunctor
+-/
 
+#print UniformSpaceCat.completionHom /-
 /-- The inclusion of a uniform space into its completion. -/
 def completionHom (X : UniformSpaceCat) :
     X ⟶ (forget₂ CpltSepUniformSpace UniformSpaceCat).obj (completionFunctor.obj X)
@@ -178,12 +215,16 @@ def completionHom (X : UniformSpaceCat) :
   val := (coe : X → Completion X)
   property := Completion.uniformContinuous_coe X
 #align UniformSpace.completion_hom UniformSpaceCat.completionHom
+-/
 
+#print UniformSpaceCat.completionHom_val /-
 @[simp]
 theorem completionHom_val (X : UniformSpaceCat) (x) : (completionHom X) x = (x : Completion X) :=
   rfl
 #align UniformSpace.completion_hom_val UniformSpaceCat.completionHom_val
+-/
 
+#print UniformSpaceCat.extensionHom /-
 /-- The mate of a morphism from a `UniformSpace` to a `CpltSepUniformSpace`. -/
 noncomputable def extensionHom {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
     (f : X ⟶ (forget₂ CpltSepUniformSpace UniformSpaceCat).obj Y) : completionFunctor.obj X ⟶ Y
@@ -191,20 +232,26 @@ noncomputable def extensionHom {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
   val := Completion.extension f
   property := Completion.uniformContinuous_extension
 #align UniformSpace.extension_hom UniformSpaceCat.extensionHom
+-/
 
+#print UniformSpaceCat.extensionHom_val /-
 @[simp]
 theorem extensionHom_val {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
     (f : X ⟶ (forget₂ _ _).obj Y) (x) : (extensionHom f) x = Completion.extension f x :=
   rfl
 #align UniformSpace.extension_hom_val UniformSpaceCat.extensionHom_val
+-/
 
+#print UniformSpaceCat.extension_comp_coe /-
 @[simp]
 theorem extension_comp_coe {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
     (f : toUniformSpace (CpltSepUniformSpace.of (Completion X)) ⟶ toUniformSpace Y) :
     extensionHom (completionHom X ≫ f) = f := by apply Subtype.eq; funext x;
   exact congr_fun (completion.extension_comp_coe f.property) x
 #align UniformSpace.extension_comp_coe UniformSpaceCat.extension_comp_coe
+-/
 
+#print UniformSpaceCat.adj /-
 /-- The completion functor is left adjoint to the forgetful functor. -/
 noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace UniformSpaceCat :=
   Adjunction.mkOfHomEquiv
@@ -223,6 +270,7 @@ noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace Unif
         erw [coe_comp, ← completion.extension_map]
         rfl; exact g.property; exact f.property }
 #align UniformSpace.adj UniformSpaceCat.adj
+-/
 
 noncomputable instance : IsRightAdjoint (forget₂ CpltSepUniformSpace UniformSpaceCat) :=
   ⟨completionFunctor, adj⟩

2a0ce625

bump to nightly-2023-06-18-05

mathlib commit https://github.com/leanprover-community/mathlib/commit/2a0ce625dbb0ffbc7d1316597de0b25c1ec75303

cd92954f

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Reid Barton, Patrick Massot, Scott Morrison
 
 ! This file was ported from Lean 3 source module topology.category.UniformSpace
-! leanprover-community/mathlib commit 70fd9563a21e7b963887c9360bd29b2393e6225a
+! leanprover-community/mathlib commit 2a0ce625dbb0ffbc7d1316597de0b25c1ec75303
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -17,6 +17,9 @@ import Mathbin.Topology.UniformSpace.Completion
 /-!
 # The category of uniform spaces
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 We construct the category of uniform spaces, show that the complete separated uniform spaces
 form a reflective subcategory, and hence possess all limits that uniform spaces do.

70fd9563

bump to nightly-2023-06-04-18

mathlib commit https://github.com/leanprover-community/mathlib/commit/5f25c089cb34db4db112556f23c50d12da81b297

3fb4268b

Diff

@@ -230,7 +230,7 @@ open CategoryTheory.Limits
 
 -- TODO Once someone defines `has_limits UniformSpace`, turn this into an instance.
 example [HasLimits.{u} UniformSpaceCat.{u}] : HasLimits.{u} CpltSepUniformSpace.{u} :=
-  has_limits_of_reflective <| forget₂ CpltSepUniformSpace UniformSpaceCat.{u}
+  hasLimits_of_reflective <| forget₂ CpltSepUniformSpace UniformSpaceCat.{u}
 
 end UniformSpaceCat

70fd9563

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -198,10 +198,7 @@ theorem extensionHom_val {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
 @[simp]
 theorem extension_comp_coe {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
     (f : toUniformSpace (CpltSepUniformSpace.of (Completion X)) ⟶ toUniformSpace Y) :
-    extensionHom (completionHom X ≫ f) = f :=
-  by
-  apply Subtype.eq
-  funext x
+    extensionHom (completionHom X ≫ f) = f := by apply Subtype.eq; funext x;
   exact congr_fun (completion.extension_comp_coe f.property) x
 #align UniformSpace.extension_comp_coe UniformSpaceCat.extension_comp_coe
 
@@ -211,9 +208,7 @@ noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace Unif
     { homEquiv := fun X Y =>
         { toFun := fun f => completionHom X ≫ f
           invFun := fun f => extensionHom f
-          left_inv := fun f => by
-            dsimp
-            erw [extension_comp_coe]
+          left_inv := fun f => by dsimp; erw [extension_comp_coe]
           right_inv := fun f => by
             apply Subtype.eq; funext x; cases f
             exact

70fd9563

bump to nightly-2023-02-27-08

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

91d8c210

Diff

@@ -235,7 +235,7 @@ open CategoryTheory.Limits
 
 -- TODO Once someone defines `has_limits UniformSpace`, turn this into an instance.
 example [HasLimits.{u} UniformSpaceCat.{u}] : HasLimits.{u} CpltSepUniformSpace.{u} :=
-  hasLimitsOfReflective <| forget₂ CpltSepUniformSpace UniformSpaceCat.{u}
+  has_limits_of_reflective <| forget₂ CpltSepUniformSpace UniformSpaceCat.{u}
 
 end UniformSpaceCat

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(CategoryTheory): make Functor.Full a Prop (#12449)

Before this PR, Functor.Full contained the data of the preimage of maps by a full functor F. This PR makes Functor.Full a proposition. This is to prevent any diamond to appear.

The lemma Functor.image_preimage is also renamed Functor.map_preimage.

Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>

ce289a0e

Diff

@@ -238,7 +238,7 @@ noncomputable instance : IsRightAdjoint (forget₂ CpltSepUniformSpace UniformSp
   ⟨completionFunctor, adj⟩
 
 noncomputable instance : Reflective (forget₂ CpltSepUniformSpace UniformSpaceCat) where
-  preimage {X Y} f := f
+  map_surjective f := ⟨f, rfl⟩
 
 open CategoryTheory.Limits

70fd9563

refactor(UniformSpace): drop separationRel (#10644)

We had duplicated API between topological spaces and uniform spaces. In this PR I mostly deduplicate it with some exceptions:

SeparationQuotient.lift' and SeparationQuotient.map are leftovers from the old version that are designed to work with uniform spaces;
probably, some theorems/instances still assume UniformSpace when TopologicalSpace would work.

Outside of UniformSpace/Separation, I mostly changed SeparatedSpace to T0Space and separationRel to Inseparable. I also rewrote a few proofs that were broken by the API change.

Fixes #2031

38155ec4

Diff

@@ -107,7 +107,7 @@ structure CpltSepUniformSpace where
   α : Type u
   [isUniformSpace : UniformSpace α]
   [isCompleteSpace : CompleteSpace α]
-  [isSeparated : SeparatedSpace α]
+  [isT0 : T0Space α]
 #align CpltSepUniformSpace CpltSepUniformSpace
 
 namespace CpltSepUniformSpace
@@ -115,7 +115,7 @@ namespace CpltSepUniformSpace
 instance : CoeSort CpltSepUniformSpace (Type u) :=
   ⟨CpltSepUniformSpace.α⟩
 
-attribute [instance] isUniformSpace isCompleteSpace isSeparated
+attribute [instance] isUniformSpace isCompleteSpace isT0
 
 /-- The function forgetting that a complete separated uniform spaces is complete and separated. -/
 def toUniformSpace (X : CpltSepUniformSpace) : UniformSpaceCat :=
@@ -126,23 +126,22 @@ instance completeSpace (X : CpltSepUniformSpace) : CompleteSpace (toUniformSpace
   CpltSepUniformSpace.isCompleteSpace X
 #align CpltSepUniformSpace.complete_space CpltSepUniformSpace.completeSpace
 
-instance separatedSpace (X : CpltSepUniformSpace) : SeparatedSpace (toUniformSpace X).α :=
-  CpltSepUniformSpace.isSeparated X
-#align CpltSepUniformSpace.separated_space CpltSepUniformSpace.separatedSpace
+instance t0Space (X : CpltSepUniformSpace) : T0Space (toUniformSpace X).α :=
+  CpltSepUniformSpace.isT0 X
+#align CpltSepUniformSpace.separated_space CpltSepUniformSpace.t0Space
 
 /-- Construct a bundled `UniformSpace` from the underlying type and the appropriate typeclasses. -/
-def of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] : CpltSepUniformSpace :=
+def of (X : Type u) [UniformSpace X] [CompleteSpace X] [T0Space X] : CpltSepUniformSpace :=
   ⟨X⟩
 #align CpltSepUniformSpace.of CpltSepUniformSpace.of
 
 @[simp]
-theorem coe_of (X : Type u) [UniformSpace X] [CompleteSpace X] [SeparatedSpace X] :
+theorem coe_of (X : Type u) [UniformSpace X] [CompleteSpace X] [T0Space X] :
     (of X : Type u) = X :=
   rfl
 #align CpltSepUniformSpace.coe_of CpltSepUniformSpace.coe_of
 
 instance : Inhabited CpltSepUniformSpace :=
-  haveI : SeparatedSpace Empty := separated_iff_t2.mpr (by infer_instance)
   ⟨CpltSepUniformSpace.of Empty⟩
 
 /-- The category instance on `CpltSepUniformSpace`. -/
@@ -223,7 +222,7 @@ noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace Unif
           left_inv := fun f => by dsimp; erw [extension_comp_coe]
           right_inv := fun f => by
             apply Subtype.eq; funext x; cases f
-            exact @Completion.extension_coe _ _ _ _ _ (CpltSepUniformSpace.separatedSpace _)
+            exact @Completion.extension_coe _ _ _ _ _ (CpltSepUniformSpace.t0Space _)
               ‹_› _ }
       homEquiv_naturality_left_symm := fun {X' X Y} f g => by
         apply hom_ext; funext x; dsimp

70fd9563

chore: classify @[simp] removed porting notes (#11184)

Classifying by adding issue number #11119 to porting notes claiming anything semantically equivalent to:

"@[simp] removed [...]"
"@[simp] removed [...]"
"removed simp attribute"

28527d30

Diff

@@ -79,7 +79,8 @@ theorem coe_id (X : UniformSpaceCat) : (𝟙 X : X → X) = id :=
   rfl
 #align UniformSpace.coe_id UniformSpaceCat.coe_id
 
--- Porting note: removed `simp` attribute due to `LEFT-HAND SIDE HAS VARIABLE AS HEAD SYMBOL.`
+-- Porting note (#11119): removed `simp` attribute
+-- due to `LEFT-HAND SIDE HAS VARIABLE AS HEAD SYMBOL.`
 theorem coe_mk {X Y : UniformSpaceCat} (f : X → Y) (hf : UniformContinuous f) :
     ((⟨f, hf⟩ : X ⟶ Y) : X → Y) = f :=
   rfl

70fd9563

chore: classify added instance porting notes (#10925)

Classifies by adding issue number (#10754) to porting notes claiming added instance.

1d96f991

Diff

@@ -194,7 +194,7 @@ noncomputable def extensionHom {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
   property := Completion.uniformContinuous_extension
 #align UniformSpace.extension_hom UniformSpaceCat.extensionHom
 
--- Porting note: added this instance to make things compile
+-- Porting note (#10754): added this instance to make things compile
 instance (X : UniformSpaceCat) : UniformSpace ((forget _).obj X) :=
   show UniformSpace X from inferInstance

70fd9563

style: reduce spacing variation in "porting note" comments (#10886)

In this pull request, I have systematically eliminated the leading whitespace preceding the colon (:) within all unlabelled or unclassified porting notes. This adjustment facilitates a more efficient review process for the remaining notes by ensuring no entries are overlooked due to formatting inconsistencies.

86b84c52

Diff

@@ -79,7 +79,7 @@ theorem coe_id (X : UniformSpaceCat) : (𝟙 X : X → X) = id :=
   rfl
 #align UniformSpace.coe_id UniformSpaceCat.coe_id
 
--- Porting note : removed `simp` attribute due to `LEFT-HAND SIDE HAS VARIABLE AS HEAD SYMBOL.`
+-- Porting note: removed `simp` attribute due to `LEFT-HAND SIDE HAS VARIABLE AS HEAD SYMBOL.`
 theorem coe_mk {X Y : UniformSpaceCat} (f : X → Y) (hf : UniformContinuous f) :
     ((⟨f, hf⟩ : X ⟶ Y) : X → Y) = f :=
   rfl
@@ -194,7 +194,7 @@ noncomputable def extensionHom {X : UniformSpaceCat} {Y : CpltSepUniformSpace}
   property := Completion.uniformContinuous_extension
 #align UniformSpace.extension_hom UniformSpaceCat.extensionHom
 
--- Porting note : added this instance to make things compile
+-- Porting note: added this instance to make things compile
 instance (X : UniformSpaceCat) : UniformSpace ((forget _).obj X) :=
   show UniformSpace X from inferInstance
 
@@ -227,7 +227,7 @@ noncomputable def adj : completionFunctor ⊣ forget₂ CpltSepUniformSpace Unif
       homEquiv_naturality_left_symm := fun {X' X Y} f g => by
         apply hom_ext; funext x; dsimp
         erw [coe_comp]
-        -- Porting note : used to be `erw [← Completion.extension_map]`
+        -- Porting note: used to be `erw [← Completion.extension_map]`
         have := (Completion.extension_map (γ := Y) (f := g) g.2 f.2)
         simp only [forget_map_eq_coe] at this ⊢
         erw [this]

70fd9563

chore: banish Type _ and Sort _ (#6499)

We remove all possible occurences of Type _ and Sort _ in favor of Type* and Sort*.

This has nice performance benefits.

32de3f67

Diff

@@ -43,7 +43,7 @@ deriving instance LargeCategory for UniformSpaceCat
 instance : ConcreteCategory UniformSpaceCat :=
   inferInstanceAs <| ConcreteCategory <| Bundled UniformSpace
 
-instance : CoeSort UniformSpaceCat (Type _) :=
+instance : CoeSort UniformSpaceCat (Type*) :=
   Bundled.coeSort
 
 instance (x : UniformSpaceCat) : UniformSpace x :=

70fd9563

chore: update links to issue #5081 to std4#86 (#6392)

Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

3e439955

Diff

@@ -66,14 +66,14 @@ instance (X Y : UniformSpaceCat) : CoeFun (X ⟶ Y) fun _ => X → Y :=
   ⟨(forget UniformSpaceCat).map⟩
 
 -- Porting note: `simpNF` should not trigger on `rfl` lemmas.
--- see https://github.com/leanprover-community/mathlib4/issues/5081
+-- see https://github.com/leanprover/std4/issues/86
 @[simp, nolint simpNF]
 theorem coe_comp {X Y Z : UniformSpaceCat} (f : X ⟶ Y) (g : Y ⟶ Z) : (f ≫ g : X → Z) = g ∘ f :=
   rfl
 #align UniformSpace.coe_comp UniformSpaceCat.coe_comp
 
 -- Porting note: `simpNF` should not trigger on `rfl` lemmas.
--- see https://github.com/leanprover-community/mathlib4/issues/5081
+-- see https://github.com/leanprover/std4/issues/86
 @[simp, nolint simpNF]
 theorem coe_id (X : UniformSpaceCat) : (𝟙 X : X → X) = id :=
   rfl

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

@@ -2,11 +2,6 @@
 Copyright (c) 2019 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Reid Barton, Patrick Massot, Scott Morrison
-
-! This file was ported from Lean 3 source module topology.category.UniformSpace
-! 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.CategoryTheory.Adjunction.Reflective
 import Mathlib.CategoryTheory.ConcreteCategory.UnbundledHom
@@ -14,6 +9,8 @@ import Mathlib.CategoryTheory.Monad.Limits
 import Mathlib.Topology.Category.TopCat.Basic
 import Mathlib.Topology.UniformSpace.Completion
 
+#align_import topology.category.UniformSpace from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a"
+
 /-!
 # The category of uniform spaces

70fd9563

chore: tidy various files (#5233)

697ac1d3

Diff

@@ -245,7 +245,7 @@ noncomputable instance : Reflective (forget₂ CpltSepUniformSpace UniformSpaceC
 
 open CategoryTheory.Limits
 
--- TODO Once someone defines `has_limits UniformSpace`, turn this into an instance.
+-- TODO Once someone defines `HasLimits UniformSpace`, turn this into an instance.
 example [HasLimits.{u} UniformSpaceCat.{u}] : HasLimits.{u} CpltSepUniformSpace.{u} :=
   hasLimits_of_reflective <| forget₂ CpltSepUniformSpace UniformSpaceCat.{u}

70fd9563

feat: port Topology.Category.UniformSpace (#4531)

Co-authored-by: Jujian Zhang <jujian.zhang1998@outlook.com>

bf2a8908

`topology.category.UniformSpace` ⟷ `Mathlib.Topology.Category.UniformSpace`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 398

topology.category.UniformSpace ⟷ Mathlib.Topology.Category.UniformSpace

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 398

`topology.category.UniformSpace` ⟷ `Mathlib.Topology.Category.UniformSpace`