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[Merged by Bors] - chore: remove @[simp] from CategoryTheory.Discrete.functor_map#21392

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[Merged by Bors] - chore: remove @[simp] from CategoryTheory.Discrete.functor_map#21392
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Discrete-functor_map-unsimp

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the simpNF complained about this in my other PR. indeed, the same simplification can be done with

simp only [Discrete.functor_obj_eq_as, Discrete.functor_map_id]

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@github-actions github-actions bot added the t-category-theory Category theory label Feb 3, 2025
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github-actions bot commented Feb 3, 2025

PR summary c4a6fedd3a

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@JovanGerb JovanGerb added the easy < 20s of review time. See the lifecycle page for guidelines. label Feb 3, 2025
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erdOne commented Feb 4, 2025

Thanks!
maintainer merge

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github-actions bot commented Feb 4, 2025

🚀 Pull request has been placed on the maintainer queue by erdOne.

@github-actions github-actions bot added the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label Feb 4, 2025
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bors d+


@[simp]
theorem functor_map {I : Type u₁} (F : I → C) {i : Discrete I} (f : i ⟶ i) :
(Discrete.functor F).map f = 𝟙 (F i.as) := by aesop_cat
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So this works, right?

Suggested change
(Discrete.functor F).map f = 𝟙 (F i.as) := by aesop_cat
(Discrete.functor F).map f = 𝟙 (F i.as) := by simp

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Might not work be because Discrete.functor_map_id is below this lemma.

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mathlib-bors bot commented Feb 4, 2025

✌️ JovanGerb can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

@ghost ghost added delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). and removed maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. labels Feb 4, 2025
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bors r+

mathlib-bors bot pushed a commit that referenced this pull request Feb 4, 2025
…21392)

the simpNF complained about this in my other PR. indeed, the same simplification can be done with
```
simp only [Discrete.functor_obj_eq_as, Discrete.functor_map_id]
```
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mathlib-bors bot commented Feb 4, 2025

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title chore: remove @[simp] from CategoryTheory.Discrete.functor_map [Merged by Bors] - chore: remove @[simp] from CategoryTheory.Discrete.functor_map Feb 4, 2025
@mathlib-bors mathlib-bors bot closed this Feb 4, 2025
@mathlib-bors mathlib-bors bot deleted the Discrete-functor_map-unsimp branch February 4, 2025 07:11
Julian added a commit that referenced this pull request Feb 5, 2025
* origin/master: (103 commits)
  chore(PresheafedSpace): remove `mk_coe` and some comments from porting  (#21382)
  refactor(CategoryTheory): `ConcreteCategory` instance for `FintypeCat` (#21466)
  refactor(Algebra/Category): clean up remaining uses of `HasForget` (#21460)
  chore(Algebra/Field/Basic): make some arguments implicit (#21453)
  chore(LinearAlgebra/TensorProduct): upgrade `TensorProduct.prodRight` (#21432)
  docs(Logic/Function/Defs): missing backticks (#21459)
  style(Logic/Embedding/Set): unindent (#21457)
  doc: document design choice of (AE)StronglyMeasurable.enorm and `edist` (#21423)
  perf(RingTheory/Artinian): reorder arguments in `IsArtinianRing.isMaximal_of_isPrime` (#21449)
  feat(Probability): first two derivatives of `cgf` (#21223)
  feat(RingTheory): `Ring.KrullDimLE` type class (#21452)
  chore(Probability/ProbabilityMassFunction/Binomial): typo "bernoulli" (#21455)
  chore: remove unused argument (#21393)
  feat(MeasureTheory/Integral/RieszMarkovKakutani) prove that the Riesz content is regular and define the Riesz measure (#20040)
  chore(Topology/Algebra/ContinuousMonoidHom): do not depend on `ContinuousLinearMap` (#21443)
  doc(CategoryTheory/Monoidal/Category): fix expression in docs (#21445)
  refactor(Order/CompleteBooleanAlgebra): a complete lattice which is a Heyting algebra is automatically a frame (#21391)
  chore: cleanup porting notes in TuringMachine (#20821)
  chore: remove @[simp] when the discr_key is a lambda (#21395)
  feat/doc: split files, add documentation (#21421)
  feat(Data/Set/Lattice): iUnion + insertion  (#21322)
  feat(Factorial): k! divides the product of any k successive integers (#21332)
  feat(CI): bench-after-CI (#21414)
  feat: primitive group actions (#12052)
  feat(Algebra/GroupWithZero/Int): add lemmas about Zm0 (#21370)
  feat(CategoryTheory): small classes of morphisms (#21411)
  feat(CategoryTheory): (co)limits of constant functors (#21412)
  chore: rename isUnit_ofPowEqOne (#21407)
  chore: split mapDomain out of MonoidAlgebra.Defs (#21398)
  chore: generalise lemmas to `ENorm` spaces, part 1 (#21380)
  chore: add `simp` to `Setoid.refl` (#21107)
  chore: tidy various files (#21406)
  chore(Geometry/Manifold/IsManifold): split out material on extended charts (#21219)
  refactor: introduce `Ideal.IsTwoSided` class for quotients of noncommutative rings (#17930)
  chore(Algebra/Category/ModuleCat): delete `ModuleCat.hasForgetModuleCat` (#21425)
  feat(RingTheory): unramified iff `κ(q)/κ(p)` is separable and `pS_q = qS_q` (#20690)
  doc(Order/Heyting/Basic): Coheyting difference is not right adjoint but left adjoint (#21418)
  chore: move ProofWidgets to v0.0.51 (#21416)
  chore: rename mem_nonZeroDivisor_of_injective and comap_nonZeroDivisor_le_of_injective (#21408)
  feat: drop ordering assumption in `RootPairing.coxeterWeight_mem_set_of_isCrystallographic` (#21122)
  feat(AlgebraicGeometry): the diagonal of an unramified morphism is an open immersion (#21386)
  feat(Data/LinearIndependent): iff versions of smul action on independent sets (#21383)
  chore(Combinatorics/SimpleGraph): Fix `hadj` naming (#21389)
  chore: rename AnalyticAt.order_neq_top_iff (#21388)
  fix: bug in daily.yml (#21401)
  chore: remove `@[simp]` from `CategoryTheory.Discrete.functor_map` (#21392)
  chore(Algebra/PUnitInstances): generalise universes (#21381)
  feat(RingTheory/PowerSeries): describe when power series map is zero (#21379)
  feat(Tactic/Linter): options to in/exclude definitions and private decls (#21374)
  feat: the prime spectrum is quasi-separated (#21362)
  ...
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