[Merged by Bors] - perf(FunLike.Basic): beta reduce CoeFun.coe
#7905
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This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Not sure about the name.
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Oct 24, 2023
This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Not sure about the name. I'd like to see if it's much better than #7905.
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Here are the benchmark results for commit 4d6319b. Benchmark Metric Change
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Here are the benchmark results for commit 18d65c8. Benchmark Metric Change
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+ build linting -6.7%
+ build tactic execution -5.4%
+ lint instructions -6.1%
+ ~Mathlib.Algebra.Category.ModuleCat.ChangeOfRings instructions -8.5%
+ ~Mathlib.Algebra.Category.Ring.Constructions instructions -38.4%
+ ~Mathlib.Algebra.DirectLimit instructions -19.6%
+ ~Mathlib.Algebra.Homology.ModuleCat instructions -32.1%
+ ~Mathlib.Algebra.Jordan.Basic instructions -5.8%
+ ~Mathlib.Algebra.Lie.Weights.Basic instructions -12.6%
+ ~Mathlib.AlgebraicGeometry.EllipticCurve.Point instructions -4.5%
+ ~Mathlib.AlgebraicGeometry.Morphisms.QuasiSeparated instructions -19.6%
+ ~Mathlib.AlgebraicGeometry.Morphisms.RingHomProperties instructions -7.1%
+ ~Mathlib.AlgebraicGeometry.ProjectiveSpectrum.Scheme instructions -7.1%
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+ ~Mathlib.Combinatorics.HalesJewett instructions -83.1%
+ ~Mathlib.FieldTheory.AbelRuffini instructions -6.1%
+ ~Mathlib.Geometry.Manifold.Algebra.LeftInvariantDerivation instructions -4.2%
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eric-wieser
reviewed
Oct 26, 2023
eric-wieser
reviewed
Oct 26, 2023
eric-wieser
reviewed
Oct 26, 2023
eric-wieser
reviewed
Oct 26, 2023
Mathlib/Algebra/Lie/DirectSum.lean
Outdated
| @[simp] | ||
| -- @[simp] -- LHS doesn't simplify after #7905 |
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This one is rather worrying
eric-wieser
reviewed
Oct 26, 2023
eric-wieser
reviewed
Oct 26, 2023
| @@ -225,7 +225,7 @@ def stalkIso {X Y : PresheafedSpace.{_, _, v} C} (α : X ≅ Y) (x : X) : | |||
| set_option linter.uppercaseLean3 false in | |||
| #align algebraic_geometry.PresheafedSpace.stalk_map.stalk_iso AlgebraicGeometry.PresheafedSpace.stalkMap.stalkIso | |||
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| @[simp, reassoc, elementwise] | |||
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Why was this de-simped? Does the same comment apply as elsewhere about simpNF getting confused?
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Is a lemma with proof parameters that do not appear directly on the LHS (but in LHS there's a proof that uses it) appropriate as a simp lemma? If it should be, then I'll add a note.
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Yes, I think this is still fine as a simp lemma, since simp creates x ⤳ y as a side-goal. Did the linter complain?
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Yes, simpNF linter complains. I think this is because x ⤳ y doesn't appear directly on the LHS.
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Is x ⤳ y a proof as you said it was, or is it data?
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eric-wieser
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Nov 15, 2023
eric-wieser
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Nov 15, 2023
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| theorem mk_reindex_cast' {n m : ℕ} (h : Fin n = Fin m) (x : (⨂[R]^n) M) : | ||
| GradedMonoid.mk (A := fun i => (⨂[R]^i) M) m | ||
| (PiTensorProduct.reindex R M (Equiv.cast h) x) = | ||
| GradedMonoid.mk n x := | ||
| Eq.symm (PiTensorProduct.gradedMonoid_eq_of_reindex_cast (fin_injective h) rfl) | ||
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I think we should get rid of this, since type equalities are evil. Does the proof below break without it?
(if not, then it doesn't belong in this PR anyway)
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For the same reason as above, the version with h : n = m is no longer a simp lemma. But removing it won't break things.
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I think all of the removed simp attributes should come with a comment referring to 7905; as far as I can tell, all of them look a bit iffy.
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This looks like a bug to me, leanprover-community/batteries#365.
I suggest you replace all of these with simpNF, and add a comment referencing std4#365.
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I've gone ahead and done that
eric-wieser
reviewed
Nov 15, 2023
eric-wieser
reviewed
Nov 15, 2023
| simp_rw [fundSystem, QuotientGroup.out_eq', ofMul_toMul] | ||
| simp_rw [fundSystem, QuotientGroup.out_eq']; rfl |
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This one is a bit weird; I'll take a look once a cache is ready.
eric-wieser
reviewed
Nov 15, 2023
| @@ -486,7 +486,6 @@ protected noncomputable def image {α β} (f : α → β) (s : Set α) (H : Inje | |||
| #align equiv.set.image Equiv.Set.image | |||
| #align equiv.set.image_apply Equiv.Set.image_apply | |||
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| @[simp] | |||
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Was this rejected by simpNF? If so, in favor of what lemma?
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⟨x, ⟨h, rfl⟩⟩ : f x ∈ f '' s is a proof.
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That's not supposed to matter... Either way, I'm happy with the comments for now, this PR is clearly a big improvement in general.
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Here are the benchmark results for commit 6267d0a. Benchmark Metric Change
==================================================================================
+ build linting -8.9%
+ lint instructions -7.7%
+ lint wall-clock -7.7%
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+ ~Mathlib.Topology.Sheaves.Stalks instructions -5.1% |
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I'm happy with this now, thanks! I'd like to jump into an editor once the cache is ready and fiddle with a couple proofs; please ping me if this PR is green and I haven't already done so. If I don't respond, I'm fine with it being merged in 8 hours. |
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This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Co-authored-by: Matthew Ballard <[email protected]> Co-authored-by: Eric Wieser <[email protected]>
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CoeFun.coeCoeFun.coe
alexkeizer
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This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Co-authored-by: Matthew Ballard <[email protected]> Co-authored-by: Eric Wieser <[email protected]>
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Nov 21, 2023
This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Co-authored-by: Matthew Ballard <[email protected]> Co-authored-by: Eric Wieser <[email protected]>
grunweg
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Dec 15, 2023
This eliminates `(fun a ↦ β) α` in the type when applying a `FunLike`. Co-authored-by: Matthew Ballard <[email protected]> Co-authored-by: Eric Wieser <[email protected]>
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This eliminates
(fun a ↦ β) αin the type when applying aFunLike.Zulip