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[Merged by Bors] - refactor(Topology/Category): clean up remaining uses of HasForget#21458

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[Merged by Bors] - refactor(Topology/Category): clean up remaining uses of HasForget#21458
Vierkantor wants to merge 3 commits intomasterfrom
concreteify-remaining-Topology

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This PR upgrades the remaining usage of HasForget in the folder Mathlib/Topology/Category, upgrading to ConcreteCategory.

I made a Hom structure for UniformSpaceCat but not for the other concrete categories, since it was the only category to actually need some disambiguating between categorical homs and uniformly continuous maps.


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This PR upgrades the remaining usage of `HasForget` in the folder `Mathlib/Topology/Category`, upgrading to `ConcreteCategory`.

I made a `Hom` structure for `UniformSpaceCat` but not for the other concrete categories, since it was the only category to actually need some disambiguating between categorical homs and uniformly continuous maps.
@Vierkantor Vierkantor added awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. t-category-theory Category theory t-topology Topological spaces, uniform spaces, metric spaces, filters labels Feb 5, 2025
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github-actions bot commented Feb 5, 2025

PR summary 582c7ad057

Import changes for modified files

Dependency changes

File Base Count Head Count Change
Mathlib.Topology.Category.Born 597 595 -2 (-0.34%)
Mathlib.Topology.Category.UniformSpace 814 812 -2 (-0.25%)
Import changes for all files
Files Import difference
Mathlib.Topology.Category.Born Mathlib.Topology.Category.UniformSpace -2

Declarations diff

+ Hom
+ Hom.hom
+ concreteCategory
+ instance (R S : TopCommRingCat.{u}) : FunLike { f : R →+* S // Continuous f } R S
+ instance : ConcreteCategory Born (LocallyBoundedMap · ·)
+ instance : ConcreteCategory Compactum (· ⟶ ·)
+ instance : ConcreteCategory TopCommRingCat.{u} fun R S => { f : R →+* S // Continuous f }
+ instance : ConcreteCategory UniformSpaceCat ({ f : · → · // UniformContinuous f })
+ instance : LargeCategory.{u} UniformSpaceCat.{u}
+ instance {X Y : Compactum} : FunLike (X ⟶ Y) X Y
+ ofHom
++ hom_comp
++ hom_id
++ hom_ofHom
++ instFunLike
+++--- of
- forgetCommRing
- forgetTopologicalRing
- forgetTopologicalSpace
- hasForget
- instance (X : Born) : Bornology X
- instance (X : UniformSpaceCat) : UniformSpace ((forget _).obj X)
- instance (X Y : UniformSpaceCat) : CoeFun (X ⟶ Y) fun _ => X → Y
- instance (x : UniformSpaceCat) : UniformSpace x
- instance : BundledHom @LocallyBoundedMap
- instance : HasForget Born
- instance : HasForget Compactum where forget := forget
- instance : HasForget TopCommRingCat.{u}
- instance : HasForget UniformSpaceCat
- instance : UnbundledHom @UniformContinuous
- instance {X Y : Compactum} : CoeFun (X ⟶ Y) fun _ => X → Y

You can run this locally as follows
## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.


Decrease in tech debt: (relative, absolute) = (2.50, 0.00)
Current number Change Type
4187 -4 porting notes
1381 -2 erw

Current commit 582c7ad057
Reference commit 86986e5d50

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary
  • The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
  • The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

@github-actions github-actions bot removed the awaiting-CI This PR does not pass CI yet. This label is automatically removed once it does. label Feb 5, 2025
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kim-em commented Feb 5, 2025

bors merge

@ghost ghost added the ready-to-merge This PR has been sent to bors. label Feb 5, 2025
mathlib-bors bot pushed a commit that referenced this pull request Feb 5, 2025
…21458)

This PR upgrades the remaining usage of `HasForget` in the folder `Mathlib/Topology/Category`, upgrading to `ConcreteCategory`.

I made a `Hom` structure for `UniformSpaceCat` but not for the other concrete categories, since it was the only category to actually need some disambiguating between categorical homs and uniformly continuous maps.
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mathlib-bors bot commented Feb 6, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title refactor(Topology/Category): clean up remaining uses of HasForget [Merged by Bors] - refactor(Topology/Category): clean up remaining uses of HasForget Feb 6, 2025
@mathlib-bors mathlib-bors bot closed this Feb 6, 2025
@mathlib-bors mathlib-bors bot deleted the concreteify-remaining-Topology branch February 6, 2025 00:10
Julian added a commit that referenced this pull request Feb 7, 2025
* origin/master:
  chore: update Mathlib dependencies 2025-02-06 (#21523)
  fix(MathlibTest/TransImports): stop inspecting the `Lean` package (#21492)
  style(Mathlib/Computability/Halting): `RePred` to `REPred` (#21216)
  feat(Data/Set/Card): add `ncard_le_encard` (#21467)
  feat(Order): lemmas for `Order.succ` and `Order.pred` in `Fin` (#21437)
  feat(LinearAlgebra/LinearIndependent): linear independence + subsingletons (#21511)
  feat: for continuous linear maps in a normed ring, `flip mul = mul` (#21507)
  chore(GroupTheory/Commutator): don't import `Ring` (#21296)
  chore(Data/Complex/Abs): add `protected` to results that already exists in root namespace (#21454)
  chore(*): `erw`s that can now become `rw`s (#21510)
  chore: allow create-adaptation-pr.sh to continue when bump branch already exists (#21486)
  feat(CategoryTheory): equivalence between `Ind C` and left exact functors from `C` to `Type` (#21430)
  chore: add test to TCSynth.lean (#21499)
  feat: the category of ind-objects satisfies the AB5 axiom (#21350)
  refactor(RepresentationTheory): `ConcreteCategory` instances for `Rep` (#21465)
  chore: split Mathlib.Order.Filter.Basic (#21403)
  chore: update Mathlib dependencies 2025-02-06 (#21487)
  chore(Cache): Add support for $MATHLIB_CACHE_DIR (#21480)
  feat(CategoryTheory): a closed monoidal category is an ordinary enriched category over itself (#21436)
  feat(AlgebraicTopology): notation X ^[n] for cosimplicial objects (#21485)
  chore: upgrade dependencies manually (#21484)
  refactor(Analysis/Normed): `ConcreteCategory` refactor for `SemiNormedGrp` (#21477)
  refactor(LinearAlgebra): `ConcreteCategory` instance for `QuadraticModuleCat` (#21471)
  refactor(MeasureTheory): `ConcreteCategory` instance for `MeasCat` (#21468)
  refactor(Topology/Category): clean up remaining uses of `HasForget` (#21458)
  refactor(CategoryTheory): `ConcreteCategory` instances for pointed types (#21470)
  feat(CategoryTheory/Action): `ConcreteCategory` instances for `Action` (#21462)
  feat(CategoryTheory): `ConcreteCategory` instance for `DifferentialObject` (#21464)
  feat(Analysis/Normed/Group/SeparationQuotient): add normed lifts and `mk` (#18178)
  chore: rename `encard_le_card` to `encard_le_encard` (#21426)
  feat: add theorem about the norm of cross products (#20920)
  feat(Data/Matroid/Circuit): circuit elimination and finitary matroids (#21172)
  feat(LinearAlgebra/ExteriorPower): add iMulti_family definition for product of a family of vectors (#21397)
pfaffelh pushed a commit that referenced this pull request Feb 7, 2025
…21458)

This PR upgrades the remaining usage of `HasForget` in the folder `Mathlib/Topology/Category`, upgrading to `ConcreteCategory`.

I made a `Hom` structure for `UniformSpaceCat` but not for the other concrete categories, since it was the only category to actually need some disambiguating between categorical homs and uniformly continuous maps.
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