name
stringlengths
2
347
module
stringlengths
6
90
type
stringlengths
1
5.42M
Std.IterM.length_map
Init.Data.Iterators.Lemmas.Combinators.Monadic.FilterMap
∀ {α β β' : Type w} {m : Type w → Type w'} [inst : Std.Iterator α m β] [inst_1 : Monad m] [inst_2 : Std.IteratorLoop α m m] [Std.Iterators.Finite α m] [LawfulMonad m] [Std.LawfulIteratorLoop α m m] {it : Std.IterM m β} {f : β → β'}, (Std.IterM.map f it).length = it.length
Ideal.gc_map_comap
Mathlib.RingTheory.Ideal.Maps
∀ {R : Type u} {S : Type v} {F : Type u_1} [inst : Semiring R] [inst_1 : Semiring S] [inst_2 : FunLike F R S] (f : F) [inst_3 : RingHomClass F R S], GaloisConnection (Ideal.map f) (Ideal.comap f)
exists_mem_nhds_ball_subset_of_mem_nhds
Mathlib.Topology.UniformSpace.Defs
∀ {α : Type ua} [inst : UniformSpace α] {a : α} {U : Set α}, U ∈ nhds a → ∃ V ∈ nhds a, ∃ t ∈ uniformity α, ∀ a' ∈ V, UniformSpace.ball a' t ⊆ U
AddEquiv.addSubgroupCongr.eq_1
Mathlib.Algebra.Group.Subgroup.Map
∀ {G : Type u_1} [inst : AddGroup G] {H K : AddSubgroup G} (h : H = K), AddEquiv.addSubgroupCongr h = { toEquiv := Equiv.setCongr ⋯, map_add' := ⋯ }
_private.Init.Data.BitVec.Lemmas.0.BitVec.setWidth_setWidth_succ_eq_setWidth_setWidth_of_getLsbD_false._proof_1_1
Init.Data.BitVec.Lemmas
∀ {w : ℕ} {i : ℕ} (k : ℕ), ¬i = k → k < i + 1 → ¬k < i → False
_private.Mathlib.RingTheory.Binomial.0.Ring.smeval_ascPochhammer_int_ofNat._simp_1_3
Mathlib.RingTheory.Binomial
∀ {R : Type u} [inst : Semiring R] (n : ℕ), ↑n = Polynomial.C ↑n
Std.DTreeMap.Internal.Impl.balanceL!.match_5.congr_eq_1
Std.Data.DTreeMap.Internal.Balancing
∀ {α : Type u_1} {β : α → Type u_2} (motive : Std.DTreeMap.Internal.Impl α β → Sort u_3) (l : Std.DTreeMap.Internal.Impl α β) (h_1 : Unit → motive Std.DTreeMap.Internal.Impl.leaf) (h_2 : (ls : ℕ) → (lk : α) → (lv : β lk) → (ll lr : Std.DTreeMap.Internal.Impl α β) → motive (Std.DTreeMap.Internal.Impl.inner ls lk lv ll lr)), l = Std.DTreeMap.Internal.Impl.leaf → (match l with | Std.DTreeMap.Internal.Impl.leaf => h_1 () | Std.DTreeMap.Internal.Impl.inner ls lk lv ll lr => h_2 ls lk lv ll lr) ≍ h_1 ()
MeasureTheory.IsHahnDecomposition.le_on
Mathlib.MeasureTheory.Measure.Decomposition.Hahn
∀ {α : Type u_1} {mα : MeasurableSpace α} {μ ν : MeasureTheory.Measure α} {s : Set α}, MeasureTheory.IsHahnDecomposition μ ν s → μ.restrict s ≤ ν.restrict s
FractionRing.algEquiv
Mathlib.RingTheory.Localization.FractionRing
(A : Type u_4) → [inst : CommRing A] → (K : Type u_6) → [inst_1 : CommRing K] → [inst_2 : Algebra A K] → [IsFractionRing A K] → FractionRing A ≃ₐ[A] K
Subgroup.mem_smul_pointwise_iff_exists
Mathlib.Algebra.Group.Subgroup.Pointwise
∀ {α : Type u_1} {G : Type u_2} [inst : Group G] [inst_1 : Monoid α] [inst_2 : MulDistribMulAction α G] (m : G) (a : α) (S : Subgroup G), m ∈ a • S ↔ ∃ s ∈ S, a • s = m
BddDistLat._sizeOf_inst
Mathlib.Order.Category.BddDistLat
SizeOf BddDistLat
WithCStarModule.uniformEquiv._proof_1
Mathlib.Analysis.CStarAlgebra.Module.Synonym
∀ {A : Type u_2} {E : Type u_1} [inst : UniformSpace E], IsUniformInducing ⇑(WithCStarModule.equiv A E)
CompactlySupportedContinuousMap.toRealLinearMap._proof_6
Mathlib.Topology.ContinuousMap.CompactlySupported
ContinuousConstSMul ℝ ℝ
Metric.infEDist_union
Mathlib.Topology.MetricSpace.HausdorffDistance
∀ {α : Type u} [inst : PseudoEMetricSpace α] {x : α} {s t : Set α}, Metric.infEDist x (s ∪ t) = min (Metric.infEDist x s) (Metric.infEDist x t)
_private.Lean.Meta.IndPredBelow.0.Lean.Meta.IndPredBelow.NewDecl.motive
Lean.Meta.IndPredBelow
Lean.LocalDecl → ℕ → Array Lean.FVarId → Lean.Meta.IndPredBelow.NewDecl✝
AlgebraicGeometry.Scheme.Modules.pseudofunctor_associativity_assoc
Mathlib.AlgebraicGeometry.Modules.Sheaf
∀ {X Y Z T : AlgebraicGeometry.Scheme} (f : X ⟶ Y) (g : Y ⟶ Z) (h : Z ⟶ T) {Z_1 : CategoryTheory.Functor T.Modules X.Modules} (h_1 : AlgebraicGeometry.Scheme.Modules.pullback (CategoryTheory.CategoryStruct.comp (CategoryTheory.CategoryStruct.comp f g) h) ⟶ Z_1), CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Scheme.Modules.pullbackComp f (CategoryTheory.CategoryStruct.comp g h)).inv (CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.whiskerRight (AlgebraicGeometry.Scheme.Modules.pullbackComp g h).inv (AlgebraicGeometry.Scheme.Modules.pullback f)) (CategoryTheory.CategoryStruct.comp ((AlgebraicGeometry.Scheme.Modules.pullback h).associator (AlgebraicGeometry.Scheme.Modules.pullback g) (AlgebraicGeometry.Scheme.Modules.pullback f)).hom (CategoryTheory.CategoryStruct.comp ((AlgebraicGeometry.Scheme.Modules.pullback h).whiskerLeft (AlgebraicGeometry.Scheme.Modules.pullbackComp f g).hom) (CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Scheme.Modules.pullbackComp (CategoryTheory.CategoryStruct.comp f g) h).hom h_1)))) = CategoryTheory.CategoryStruct.comp (CategoryTheory.eqToHom ⋯) h_1
_private.Lean.Compiler.LCNF.Renaming.0.Lean.Compiler.LCNF.Param.applyRenaming.match_1
Lean.Compiler.LCNF.Renaming
(motive : Option Lean.Name → Sort u_1) → (x : Option Lean.Name) → ((binderName : Lean.Name) → motive (some binderName)) → ((x : Option Lean.Name) → motive x) → motive x
ContinuousMultilinearMap.norm_ofSubsingleton_id_le
Mathlib.Analysis.Normed.Module.Multilinear.Basic
∀ (𝕜 : Type u) {ι : Type v} (G : Type wG) [inst : NontriviallyNormedField 𝕜] [inst_1 : SeminormedAddCommGroup G] [inst_2 : NormedSpace 𝕜 G] [inst_3 : Fintype ι] [inst_4 : Subsingleton ι] (i : ι), ‖(ContinuousMultilinearMap.ofSubsingleton 𝕜 G G i) (ContinuousLinearMap.id 𝕜 G)‖ ≤ 1
Std.Time.TimeZone.Transition.localTimeType
Std.Time.Zoned.ZoneRules
Std.Time.TimeZone.Transition → Std.Time.TimeZone.LocalTimeType
CategoryTheory.categoryOfEnrichedCategoryType._proof_1
Mathlib.CategoryTheory.Enriched.Basic
∀ (C : Type u_2) [𝒞 : CategoryTheory.EnrichedCategory (Type u_1) C] {X Y : C} (f : X ⟶[Type u_1] Y), CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.leftUnitor (X ⟶[Type u_1] Y)).inv (CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerRight (CategoryTheory.eId (Type u_1) X) (X ⟶[Type u_1] Y)) (CategoryTheory.eComp (Type u_1) X X Y)) f = CategoryTheory.CategoryStruct.id (X ⟶[Type u_1] Y) f
Lean.IR.IRType._sizeOf_1
Lean.Compiler.IR.Basic
Lean.IR.IRType → ℕ
CategoryTheory.StructuredArrow.commaMapEquivalenceCounitIso._proof_4
Mathlib.CategoryTheory.Comma.StructuredArrow.CommaMap
∀ {C : Type u_4} [inst : CategoryTheory.Category.{u_1, u_4} C] {D : Type u_6} [inst_1 : CategoryTheory.Category.{u_2, u_6} D] {T : Type u_8} [inst_2 : CategoryTheory.Category.{u_3, u_8} T] {L : CategoryTheory.Functor C T} {R : CategoryTheory.Functor D T} {C' : Type u_10} [inst_3 : CategoryTheory.Category.{u_5, u_10} C'] {D' : Type u_11} [inst_4 : CategoryTheory.Category.{u_7, u_11} D'] {T' : Type u_12} [inst_5 : CategoryTheory.Category.{u_9, u_12} T'] {L' : CategoryTheory.Functor C' T'} {R' : CategoryTheory.Functor D' T'} {F₁ : CategoryTheory.Functor C C'} {F₂ : CategoryTheory.Functor D D'} {F : CategoryTheory.Functor T T'} (α : F₁.comp L' ⟶ L.comp F) (β : R.comp F ⟶ F₂.comp R') [inst_6 : CategoryTheory.IsIso β] (X : CategoryTheory.Comma L' R') {X_1 Y : CategoryTheory.Comma (CategoryTheory.StructuredArrow.map₂ (CategoryTheory.CategoryStruct.id (L'.obj X.left)) α) (CategoryTheory.StructuredArrow.map₂ X.hom (CategoryTheory.inv β))} (f : X_1 ⟶ Y), CategoryTheory.CategoryStruct.comp (((CategoryTheory.StructuredArrow.commaMapEquivalenceInverse α β X).comp (CategoryTheory.StructuredArrow.commaMapEquivalenceFunctor α β X)).map f) ((fun x => CategoryTheory.Comma.isoMk (CategoryTheory.Iso.refl (((CategoryTheory.StructuredArrow.commaMapEquivalenceInverse α β X).comp (CategoryTheory.StructuredArrow.commaMapEquivalenceFunctor α β X)).obj x).left) (CategoryTheory.Iso.refl (((CategoryTheory.StructuredArrow.commaMapEquivalenceInverse α β X).comp (CategoryTheory.StructuredArrow.commaMapEquivalenceFunctor α β X)).obj x).right) ⋯) Y).hom = CategoryTheory.CategoryStruct.comp ((fun x => CategoryTheory.Comma.isoMk (CategoryTheory.Iso.refl (((CategoryTheory.StructuredArrow.commaMapEquivalenceInverse α β X).comp (CategoryTheory.StructuredArrow.commaMapEquivalenceFunctor α β X)).obj x).left) (CategoryTheory.Iso.refl (((CategoryTheory.StructuredArrow.commaMapEquivalenceInverse α β X).comp (CategoryTheory.StructuredArrow.commaMapEquivalenceFunctor α β X)).obj x).right) ⋯) X_1).hom ((CategoryTheory.Functor.id (CategoryTheory.Comma (CategoryTheory.StructuredArrow.map₂ (CategoryTheory.CategoryStruct.id (L'.obj X.left)) α) (CategoryTheory.StructuredArrow.map₂ X.hom (CategoryTheory.inv β)))).map f)
Homotopy.mkInductiveAux₁._sunfold
Mathlib.Algebra.Homology.Homotopy
{V : Type u} → [inst : CategoryTheory.Category.{v, u} V] → [inst_1 : CategoryTheory.Preadditive V] → {P Q : ChainComplex V ℕ} → (e : P ⟶ Q) → (zero : P.X 0 ⟶ Q.X 1) → (one : P.X 1 ⟶ Q.X 2) → e.f 1 = CategoryTheory.CategoryStruct.comp (P.d 1 0) zero + CategoryTheory.CategoryStruct.comp one (Q.d 2 1) → ((n : ℕ) → (p : (f : P.X n ⟶ Q.X (n + 1)) ×' (f' : P.X (n + 1) ⟶ Q.X (n + 2)) ×' e.f (n + 1) = CategoryTheory.CategoryStruct.comp (P.d (n + 1) n) f + CategoryTheory.CategoryStruct.comp f' (Q.d (n + 2) (n + 1))) → (f'' : P.X (n + 2) ⟶ Q.X (n + 3)) ×' e.f (n + 2) = CategoryTheory.CategoryStruct.comp (P.d (n + 2) (n + 1)) p.snd.fst + CategoryTheory.CategoryStruct.comp f'' (Q.d (n + 3) (n + 2))) → (n : ℕ) → (f : P.X n ⟶ Q.X (n + 1)) ×' (f' : P.X (n + 1) ⟶ Q.X (n + 2)) ×' e.f (n + 1) = CategoryTheory.CategoryStruct.comp (P.d (n + 1) n) f + CategoryTheory.CategoryStruct.comp f' (Q.d (n + 2) (n + 1))
Cardinal.toNat_congr
Mathlib.SetTheory.Cardinal.ToNat
∀ {α : Type u} {β : Type v} (e : α ≃ β), Cardinal.toNat (Cardinal.mk α) = Cardinal.toNat (Cardinal.mk β)
AddZero.toZero
Mathlib.Algebra.Group.Defs
{M : Type u_2} → [self : AddZero M] → Zero M
_private.Lean.Meta.Tactic.FunIndInfo.0.Lean.Meta.getFunInduct?._sparseCasesOn_1
Lean.Meta.Tactic.FunIndInfo
{motive : Lean.ConstantInfo → Sort u} → (t : Lean.ConstantInfo) → ((val : Lean.DefinitionVal) → motive (Lean.ConstantInfo.defnInfo val)) → (Nat.hasNotBit 2 t.ctorIdx → motive t) → motive t
CategoryTheory.Functor.RepresentableBy.recOn
Mathlib.CategoryTheory.Yoneda
{C : Type u₁} → [inst : CategoryTheory.Category.{v₁, u₁} C] → {F : CategoryTheory.Functor Cᵒᵖ (Type v)} → {Y : C} → {motive : F.RepresentableBy Y → Sort u} → (t : F.RepresentableBy Y) → ((homEquiv : {X : C} → (X ⟶ Y) ≃ F.obj (Opposite.op X)) → (homEquiv_comp : ∀ {X X' : C} (f : X ⟶ X') (g : X' ⟶ Y), homEquiv (CategoryTheory.CategoryStruct.comp f g) = F.map f.op (homEquiv g)) → motive { homEquiv := homEquiv, homEquiv_comp := homEquiv_comp }) → motive t
Aesop.Script.TacticState._sizeOf_inst
Aesop.Script.TacticState
SizeOf Aesop.Script.TacticState
IsEvenlyCovered.homeomorph_comp
Mathlib.Topology.Covering.Basic
∀ {E : Type u_1} {X : Type u_2} [inst : TopologicalSpace E] [inst_1 : TopologicalSpace X] {f : E → X} {I : Type u_3} [inst_2 : TopologicalSpace I] {x : X}, IsEvenlyCovered f x I → ∀ {Y : Type u_4} [inst_3 : TopologicalSpace Y] (g : X ≃ₜ Y), IsEvenlyCovered (⇑g ∘ f) (g x) I
Unitary.mapEquiv_trans
Mathlib.Algebra.Star.Unitary
∀ {R : Type u_2} {S : Type u_3} {T : Type u_4} [inst : Monoid R] [inst_1 : StarMul R] [inst_2 : Monoid S] [inst_3 : StarMul S] [inst_4 : Monoid T] [inst_5 : StarMul T] (f : R ≃⋆* S) (g : S ≃⋆* T), Unitary.mapEquiv (f.trans g) = (Unitary.mapEquiv f).trans (Unitary.mapEquiv g)
Lean.Widget.DiffTag.wasDeleted.sizeOf_spec
Lean.Widget.InteractiveCode
sizeOf Lean.Widget.DiffTag.wasDeleted = 1
_private.Std.Data.DHashMap.Internal.RawLemmas.0.Std.DHashMap.Internal.Raw₀.Equiv.diff_right._simp_1_1
Std.Data.DHashMap.Internal.RawLemmas
∀ {α : Type u} {β : α → Type v} {m₁ m₂ : Std.DHashMap.Raw α β}, m₁.Equiv m₂ = (Std.DHashMap.Internal.toListModel m₁.buckets).Perm (Std.DHashMap.Internal.toListModel m₂.buckets)
_private.Batteries.Data.List.Lemmas.0.List.getElem_idxOf_eq_idxOfNth_add._proof_1_32
Batteries.Data.List.Lemmas
∀ {α : Type u_1} {x : α} [inst : BEq α] (head : α) (tail : List α), 1 ≤ (List.filter (fun x_1 => x_1 == x) (head :: tail)).length → 0 < (List.findIdxs (fun x_1 => x_1 == x) (head :: tail)).length
SimpleGraph.Walk.boxProdRight.eq_1
Mathlib.Combinatorics.SimpleGraph.Prod
∀ {α : Type u_1} {β : Type u_2} (G : SimpleGraph α) {H : SimpleGraph β} {b₁ b₂ : β} (a : α), SimpleGraph.Walk.boxProdRight G a = SimpleGraph.Walk.map (G.boxProdRight H a).toHom
Equidecomp.trans_toPartialEquiv
Mathlib.Algebra.Group.Action.Equidecomp
∀ {X : Type u_1} {G : Type u_2} [inst : Monoid G] [inst_1 : MulAction G X] (f g : Equidecomp X G), (f.trans g).toPartialEquiv = f.trans g.toPartialEquiv
_private.Lean.Compiler.LCNF.ToMono.0.Lean.Compiler.LCNF.argsToMonoWithFnType.match_1
Lean.Compiler.LCNF.ToMono
(motive : Option Lean.Expr → Sort u_1) → (remainingType : Option Lean.Expr) → ((binderName : Lean.Name) → (d b : Lean.Expr) → (binderInfo : Lean.BinderInfo) → motive (some (Lean.Expr.forallE binderName d b binderInfo))) → ((x : Option Lean.Expr) → motive x) → motive remainingType
HasStrictDerivAt.hasStrictFDerivAt_equiv
Mathlib.Analysis.Calculus.Deriv.Inverse
∀ {𝕜 : Type u} [inst : NontriviallyNormedField 𝕜] {f : 𝕜 → 𝕜} {f' x : 𝕜}, HasStrictDerivAt f f' x → ∀ (hf' : f' ≠ 0), HasStrictFDerivAt f (↑((ContinuousLinearEquiv.unitsEquivAut 𝕜) (Units.mk0 f' hf'))) x
Std.ExtTreeSet.contains_insert
Std.Data.ExtTreeSet.Lemmas
∀ {α : Type u} {cmp : α → α → Ordering} {t : Std.ExtTreeSet α cmp} [inst : Std.TransCmp cmp] {k a : α}, (t.insert k).contains a = (cmp k a == Ordering.eq || t.contains a)
CategoryTheory.Limits.Multicofork.ofSigmaCofork._proof_1
Mathlib.CategoryTheory.Limits.Shapes.Multiequalizer
∀ {C : Type u_4} [inst : CategoryTheory.Category.{u_3, u_4} C] {J : CategoryTheory.Limits.MultispanShape} {I : CategoryTheory.Limits.MultispanIndex J C} {c : CategoryTheory.Limits.Cofan I.left} {hc : CategoryTheory.Limits.IsColimit c} {d : CategoryTheory.Limits.Cofan I.right} (a : CategoryTheory.Limits.Cofork (I.fstSigmaMapOfIsColimit d hc) (I.sndSigmaMapOfIsColimit d hc)) ⦃X Y : CategoryTheory.Limits.WalkingMultispan J⦄ (f : X ⟶ Y), CategoryTheory.CategoryStruct.comp (I.multispan.map f) (match Y with | CategoryTheory.Limits.WalkingMultispan.left a_1 => CategoryTheory.CategoryStruct.comp (c.inj a_1) (CategoryTheory.CategoryStruct.comp (I.fstSigmaMapOfIsColimit d hc) a.π) | CategoryTheory.Limits.WalkingMultispan.right a_1 => CategoryTheory.CategoryStruct.comp (d.inj a_1) a.π) = CategoryTheory.CategoryStruct.comp (match X with | CategoryTheory.Limits.WalkingMultispan.left a_1 => CategoryTheory.CategoryStruct.comp (c.inj a_1) (CategoryTheory.CategoryStruct.comp (I.fstSigmaMapOfIsColimit d hc) a.π) | CategoryTheory.Limits.WalkingMultispan.right a_1 => CategoryTheory.CategoryStruct.comp (d.inj a_1) a.π) (((CategoryTheory.Functor.const (CategoryTheory.Limits.WalkingMultispan J)).obj a.pt).map f)
List.splitOnP_nil
Mathlib.Data.List.SplitOn
∀ {α : Type u_1} (p : α → Bool), List.splitOnP p [] = [[]]
List.permutationsAux2._sunfold
Mathlib.Data.List.Defs
{α : Type u_1} → {β : Type u_2} → α → List α → List β → List α → (List α → β) → List α × List β
_private.Mathlib.RingTheory.Spectrum.Prime.Topology.0.PrimeSpectrum.basicOpen_eq_bot_iff._simp_1_6
Mathlib.RingTheory.Spectrum.Prime.Topology
∀ {A : Type u_1} {B : Type u_2} [i : SetLike A B] {p : A} {x : B}, (x ∈ ↑p) = (x ∈ p)
Std.Iterators.HetT.property_liftInner
Std.Data.Iterators.Lemmas.Equivalence.HetT
∀ {α : Type u_1} {m : Type w → Type w'} {n : Type w → Type w''} [inst : MonadLiftT m n] {x : Std.Iterators.HetT m α}, (Std.Iterators.HetT.liftInner n x).Property = x.Property
BoundedContinuousFunction
Mathlib.Topology.ContinuousMap.Bounded.Basic
(α : Type u) → (β : Type v) → [TopologicalSpace α] → [PseudoMetricSpace β] → Type (max u v)
_private.Mathlib.Algebra.Algebra.Spectrum.Basic.0.spectrum.smul_mem_smul_iff._simp_1_3
Mathlib.Algebra.Algebra.Spectrum.Basic
∀ {α : Type u_5} {β : Type u_6} [inst : Group α] [inst_1 : Monoid β] [inst_2 : MulAction α β] [SMulCommClass α β β] [IsScalarTower α β β] (g : α) (m : β), IsUnit (g • m) = IsUnit m
Std.DHashMap.Raw.WF.inter₀
Std.Data.DHashMap.Raw
∀ {α : Type u} {β : α → Type v} [inst : BEq α] [inst_1 : Hashable α] {m₁ m₂ : Std.DHashMap.Raw α β} {h₁ : 0 < m₁.buckets.size} {h₂ : 0 < m₂.buckets.size}, m₁.WF → m₂.WF → (↑(Std.DHashMap.Internal.Raw₀.inter ⟨m₁, h₁⟩ ⟨m₂, h₂⟩)).WF
AddSubmonoid.single_mem_pi._simp_1
Mathlib.Algebra.Group.Submonoid.Operations
∀ {ι : Type u_4} {M : ι → Type u_5} [inst : (i : ι) → AddZeroClass (M i)] [inst_1 : DecidableEq ι] {I : Set ι} {S : (i : ι) → AddSubmonoid (M i)} (i : ι) (x : M i), (Pi.single i x ∈ AddSubmonoid.pi I S) = (i ∈ I → x ∈ S i)
List.instLE
Init.Data.List.Basic
{α : Type u} → [LT α] → LE (List α)
Asymptotics.isLittleOTVS_sup
Mathlib.Analysis.Asymptotics.TVS
∀ {α : Type u_1} {𝕜 : Type u_3} {E : Type u_4} {F : Type u_5} [inst : NontriviallyNormedField 𝕜] [inst_1 : AddCommGroup E] [inst_2 : TopologicalSpace E] [inst_3 : Module 𝕜 E] [inst_4 : AddCommGroup F] [inst_5 : TopologicalSpace F] [inst_6 : Module 𝕜 F] {l₁ l₂ : Filter α} {f : α → E} {g : α → F}, f =o[𝕜; l₁ ⊔ l₂] g ↔ f =o[𝕜; l₁] g ∧ f =o[𝕜; l₂] g
_private.Mathlib.SetTheory.Ordinal.Arithmetic.0.Ordinal.add_le_add_iff_right.match_1_1
Mathlib.SetTheory.Ordinal.Arithmetic
∀ (motive : ℕ → Prop) (x : ℕ), (∀ (a : Unit), motive 0) → (∀ (n : ℕ), motive n.succ) → motive x
Lean.PrettyPrinter.OneLine.State.column._default
Lean.PrettyPrinter.Formatter
groupHomology.boundaries₁
Mathlib.RepresentationTheory.Homological.GroupHomology.LowDegree
{k G : Type u} → [inst : CommRing k] → [inst_1 : Group G] → (A : Rep k G) → Submodule k (G →₀ ↑A.V)
CategoryTheory.MorphismProperty.limitsOfShape_le
Mathlib.CategoryTheory.MorphismProperty.Limits
∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {W : CategoryTheory.MorphismProperty C} {J : Type u_1} [inst_1 : CategoryTheory.Category.{v_1, u_1} J] [W.IsStableUnderLimitsOfShape J], W.limitsOfShape J ≤ W
Complex.ofReal_inv._simp_1
Mathlib.Data.Complex.Basic
∀ (r : ℝ), (↑r)⁻¹ = ↑r⁻¹
_private.Mathlib.Algebra.Homology.SpectralObject.Page.0.CategoryTheory.Abelian.SpectralObject.isIso_map._proof_11
Mathlib.Algebra.Homology.SpectralObject.Page
1 ≤ 3
SchwartzMap.toLpCLM._proof_3
Mathlib.Analysis.Distribution.SchwartzSpace.Basic
∀ (𝕜 : Type u_3) {E : Type u_1} (F : Type u_2) [inst : NormedAddCommGroup E] [inst_1 : NormedSpace ℝ E] [inst_2 : NormedAddCommGroup F] [inst_3 : NormedSpace ℝ F] [inst_4 : MeasurableSpace E] [inst_5 : OpensMeasurableSpace E] [inst_6 : NormedField 𝕜] [inst_7 : NormedSpace 𝕜 F] [inst_8 : SMulCommClass ℝ 𝕜 F] [inst_9 : SecondCountableTopologyEither E F] (p : ENNReal) (μ : MeasureTheory.Measure E) [hμ : μ.HasTemperateGrowth] (x : 𝕜) (x_1 : SchwartzMap E F), (x • x_1).toLp p μ = (x • x_1).toLp p μ
_private.Mathlib.RingTheory.Norm.Transitivity.0.Algebra.Norm.Transitivity.eval_zero_comp_det._simp_1_7
Mathlib.RingTheory.Norm.Transitivity
∀ {α : Type u_2} {β : Type u_3} {γ : Type u_4} {x : NonAssocSemiring α} {x_1 : NonAssocSemiring β} {x_2 : NonAssocSemiring γ} {δ : Type u_5} {x_3 : NonAssocSemiring δ} (f : α →+* β) (g : β →+* γ) (h : γ →+* δ), h.comp (g.comp f) = (h.comp g).comp f
_private.Mathlib.Analysis.Convex.DoublyStochasticMatrix.0.convex_doublyStochastic._simp_1_2
Mathlib.Analysis.Convex.DoublyStochasticMatrix
∀ {R : Type u_1} {n : Type u_2} [inst : Fintype n] [inst_1 : DecidableEq n] [inst_2 : Semiring R] [inst_3 : PartialOrder R] [inst_4 : IsOrderedRing R] {M : Matrix n n R}, (M ∈ doublyStochastic R n) = ((∀ (i j : n), 0 ≤ M i j) ∧ (∀ (i : n), ∑ j, M i j = 1) ∧ ∀ (j : n), ∑ i, M i j = 1)
Lean.Elab.Term.mkCalcStepViews
Lean.Elab.Calc
Lean.TSyntax `Lean.calcSteps → Lean.Elab.TermElabM (Array Lean.Elab.Term.CalcStepView)
Lean.SourceInfo.fromRef
Init.Prelude
Lean.Syntax → optParam Bool false → Lean.SourceInfo
_private.Mathlib.Data.Seq.Basic.0.Stream'.Seq.all_cons._simp_1_1
Mathlib.Data.Seq.Basic
∀ {α : Type u} {a b : α} {s : Stream'.Seq α}, (a ∈ Stream'.Seq.cons b s) = (a = b ∨ a ∈ s)
AnalyticAtWithin.compContinuousLinearMap
Mathlib.Analysis.Analytic.Constructions
∀ {𝕜 : Type u_2} [inst : NontriviallyNormedField 𝕜] {E : Type u_3} {F : Type u_4} {G : Type u_5} [inst_1 : NormedAddCommGroup E] [inst_2 : NormedSpace 𝕜 E] [inst_3 : NormedAddCommGroup F] [inst_4 : NormedSpace 𝕜 F] [inst_5 : NormedAddCommGroup G] [inst_6 : NormedSpace 𝕜 G] {u : E →L[𝕜] F} {f : F → G} {s : Set F} {x : E}, AnalyticWithinAt 𝕜 f s (u x) → AnalyticWithinAt 𝕜 (f ∘ ⇑u) (⇑u ⁻¹' s) x
LinearMap.rTensor_comp
Mathlib.LinearAlgebra.TensorProduct.Map
∀ {R : Type u_1} [inst : CommSemiring R] (M : Type u_7) {N : Type u_8} {P : Type u_9} {Q : Type u_10} [inst_1 : AddCommMonoid M] [inst_2 : AddCommMonoid N] [inst_3 : AddCommMonoid P] [inst_4 : AddCommMonoid Q] [inst_5 : Module R M] [inst_6 : Module R N] [inst_7 : Module R P] [inst_8 : Module R Q] (g : P →ₗ[R] Q) (f : N →ₗ[R] P), LinearMap.rTensor M (g ∘ₗ f) = LinearMap.rTensor M g ∘ₗ LinearMap.rTensor M f
Filter.Tendsto.val_inv_units
Mathlib.Topology.Algebra.Monoid
∀ {ι : Type u_1} {N : Type u_4} [inst : TopologicalSpace N] [inst_1 : Monoid N] [inst_2 : ContinuousMul N] [inst_3 : T2Space N] {f : ι → Nˣ} {r₁ r₂ : N} {l : Filter ι} [inst_4 : l.NeBot] (h₁ : Filter.Tendsto (fun x => ↑(f x)) l (nhds r₁)) (h₂ : Filter.Tendsto (fun x => ↑(f x)⁻¹) l (nhds r₂)), ↑(h₁.units h₂)⁻¹ = r₂
pointedToBipointedSndBipointedToPointedSndAdjunction._proof_7
Mathlib.CategoryTheory.Category.Bipointed
∀ (X : Pointed) (Y : Bipointed) (f : X ⟶ bipointedToPointedSnd.obj Y), f.toFun X.point = (bipointedToPointedSnd.obj Y).point
CategoryTheory.StrictPseudofunctorPreCore.ctorIdx
Mathlib.CategoryTheory.Bicategory.Functor.StrictPseudofunctor
{B : Type u₁} → {inst : CategoryTheory.Bicategory B} → {C : Type u₂} → {inst_1 : CategoryTheory.Bicategory C} → CategoryTheory.StrictPseudofunctorPreCore B C → ℕ
SaturatedSubmonoid.instCompleteLattice._proof_3
Mathlib.Algebra.Group.Submonoid.Saturation
∀ (M : Type u_1) [inst : MulOneClass M] (a b c : SaturatedSubmonoid M), a ≤ c → b ≤ c → SemilatticeSup.sup a b ≤ c
Lean.Widget.RpcEncodablePacket.strict.«_@».Lean.Widget.InteractiveDiagnostic.2157017296._hygCtx._hyg.1.noConfusion
Lean.Widget.InteractiveDiagnostic
{P : Sort u} → {a a' : Lean.Json} → Lean.Widget.RpcEncodablePacket.strict✝ a = Lean.Widget.RpcEncodablePacket.strict✝ a' → (a = a' → P) → P
Lean.Meta.instReprSimpCongrTheorems.repr
Lean.Meta.Tactic.Simp.SimpCongrTheorems
Lean.Meta.SimpCongrTheorems → ℕ → Std.Format
ModuleCat.extendScalars_assoc'
Mathlib.Algebra.Category.ModuleCat.ChangeOfRings
∀ {R₁ R₂ R₃ R₄ : Type u₁} [inst : CommRing R₁] [inst_1 : CommRing R₂] [inst_2 : CommRing R₃] [inst_3 : CommRing R₄] (f₁₂ : R₁ →+* R₂) (f₂₃ : R₂ →+* R₃) (f₃₄ : R₃ →+* R₄), CategoryTheory.CategoryStruct.comp (ModuleCat.extendScalarsComp (f₂₃.comp f₁₂) f₃₄).hom (CategoryTheory.CategoryStruct.comp (CategoryTheory.Functor.whiskerRight (ModuleCat.extendScalarsComp f₁₂ f₂₃).hom (ModuleCat.extendScalars f₃₄)) (CategoryTheory.CategoryStruct.comp ((ModuleCat.extendScalars f₁₂).associator (ModuleCat.extendScalars f₂₃) (ModuleCat.extendScalars f₃₄)).hom (CategoryTheory.CategoryStruct.comp ((ModuleCat.extendScalars f₁₂).whiskerLeft (ModuleCat.extendScalarsComp f₂₃ f₃₄).inv) (ModuleCat.extendScalarsComp f₁₂ (f₃₄.comp f₂₃)).inv))) = CategoryTheory.CategoryStruct.id (ModuleCat.extendScalars (f₃₄.comp (f₂₃.comp f₁₂)))
measurableEmbedding_mulLeft₀
Mathlib.MeasureTheory.Group.MeasurableEquiv
∀ {G₀ : Type u_2} [inst : GroupWithZero G₀] [inst_1 : MeasurableSpace G₀] [MeasurableMul G₀] {g : G₀}, g ≠ 0 → MeasurableEmbedding fun x => g * x
Qq.Impl.PatVarDecl.fvar
Qq.MatchImpl
(decl : Qq.Impl.PatVarDecl) → have a := decl.fvarTy; Q(«$a»)
_private.Mathlib.Combinatorics.SimpleGraph.Matching.0.SimpleGraph.Subgraph.IsMatching.iSup._simp_1_1
Mathlib.Combinatorics.SimpleGraph.Matching
∀ {α : Type u} {s t : Set α}, Disjoint s t = ∀ ⦃a : α⦄, a ∈ s → a ∉ t
Cardinal.lift_eq_aleph1
Mathlib.SetTheory.Cardinal.Aleph
∀ {c : Cardinal.{u}}, Cardinal.lift.{v, u} c = Cardinal.aleph 1 ↔ c = Cardinal.aleph 1
List.forIn'.loop._proof_1
Init.Data.List.Control
∀ {α : Type u_1} (as : List α) (a : α) (as' : List α), (∃ bs, bs ++ a :: as' = as) → ∃ bs, bs ++ as' = as
groupHomology.isBoundary₁_of_mem_boundaries₁
Mathlib.RepresentationTheory.Homological.GroupHomology.LowDegree
∀ {k G A : Type u} [inst : CommRing k] [inst_1 : Group G] [inst_2 : AddCommGroup A] [inst_3 : Module k A] [inst_4 : DistribMulAction G A] [inst_5 : SMulCommClass G k A], ∀ x ∈ groupHomology.boundaries₁ (Rep.ofDistribMulAction k G A), groupHomology.IsBoundary₁ x
CategoryTheory.FreeBicategory.Hom₂.whisker_left.sizeOf_spec
Mathlib.CategoryTheory.Bicategory.Free
∀ {B : Type u} [inst : Quiver B] [inst_1 : SizeOf B] {a b c : CategoryTheory.FreeBicategory B} (f : a ⟶ b) {g h : b ⟶ c} (η : CategoryTheory.FreeBicategory.Hom₂ g h), sizeOf (CategoryTheory.FreeBicategory.Hom₂.whisker_left f η) = 1 + sizeOf a + sizeOf b + sizeOf c + sizeOf f + sizeOf g + sizeOf h + sizeOf η
UInt32.toFin_mul
Init.Data.UInt.Lemmas
∀ (a b : UInt32), (a * b).toFin = a.toFin * b.toFin
AlgebraicGeometry.Scheme.Pullback.t_fst_snd
Mathlib.AlgebraicGeometry.Pullbacks
∀ {X Y Z : AlgebraicGeometry.Scheme} (𝒰 : X.OpenCover) (f : X ⟶ Z) (g : Y ⟶ Z) [inst : ∀ (i : 𝒰.I₀), CategoryTheory.Limits.HasPullback (CategoryTheory.CategoryStruct.comp (𝒰.f i) f) g] (i j : 𝒰.I₀), CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Scheme.Pullback.t 𝒰 f g i j) (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.pullback.fst (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.pullback.fst (CategoryTheory.CategoryStruct.comp (𝒰.f j) f) g) (𝒰.f j)) (𝒰.f i)) (CategoryTheory.Limits.pullback.snd (CategoryTheory.CategoryStruct.comp (𝒰.f j) f) g)) = CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.pullback.fst (CategoryTheory.CategoryStruct.comp (CategoryTheory.Limits.pullback.fst (CategoryTheory.CategoryStruct.comp (𝒰.f i) f) g) (𝒰.f i)) (𝒰.f j)) (CategoryTheory.Limits.pullback.snd (CategoryTheory.CategoryStruct.comp (𝒰.f i) f) g)
Lean.Elab.Term.elabProp._regBuiltin.Lean.Elab.Term.elabProp.declRange_3
Lean.Elab.BuiltinTerm
IO Unit
_private.Lean.Compiler.LCNF.ExplicitRC.0.Lean.Compiler.LCNF.CollectDerivedValInfo.State._sizeOf_1
Lean.Compiler.LCNF.ExplicitRC
Lean.Compiler.LCNF.CollectDerivedValInfo.State✝ → ℕ
Lean.Meta.Grind.CheckResult.closed.elim
Lean.Meta.Tactic.Grind.CheckResult
{motive : Lean.Meta.Grind.CheckResult → Sort u} → (t : Lean.Meta.Grind.CheckResult) → t.ctorIdx = 3 → motive Lean.Meta.Grind.CheckResult.closed → motive t
_private.Mathlib.Algebra.Category.Ring.Colimits.0.RingCat.Colimits.descFunLift.match_1.eq_4
Mathlib.Algebra.Category.Ring.Colimits
∀ {J : Type u_1} [inst : CategoryTheory.SmallCategory J] (F : CategoryTheory.Functor J RingCat) (motive : RingCat.Colimits.Prequotient F → Sort u_2) (x : RingCat.Colimits.Prequotient F) (h_1 : (j : J) → (x : ↑(F.obj j)) → motive (RingCat.Colimits.Prequotient.of j x)) (h_2 : Unit → motive RingCat.Colimits.Prequotient.zero) (h_3 : Unit → motive RingCat.Colimits.Prequotient.one) (h_4 : (x : RingCat.Colimits.Prequotient F) → motive x.neg) (h_5 : (x y : RingCat.Colimits.Prequotient F) → motive (x.add y)) (h_6 : (x y : RingCat.Colimits.Prequotient F) → motive (x.mul y)), (match x.neg with | RingCat.Colimits.Prequotient.of j x => h_1 j x | RingCat.Colimits.Prequotient.zero => h_2 () | RingCat.Colimits.Prequotient.one => h_3 () | x.neg => h_4 x | x.add y => h_5 x y | x.mul y => h_6 x y) = h_4 x
instReprUInt64
Init.Data.Repr
Repr UInt64
CharP.orderOf_eq_two_iff
Mathlib.GroupTheory.OrderOfElement
∀ {R : Type u_6} [inst : Ring R] [Nontrivial R] [NoZeroDivisors R] (p : ℕ), p ≠ 2 → ∀ [CharP R p] {x : R}, orderOf x = 2 ↔ x = -1
Polynomial.aeval_conj
Mathlib.Analysis.RCLike.Lemmas
∀ {K : Type u_1} [inst : RCLike K] (p : Polynomial ℝ) (z : K), (Polynomial.aeval ((starRingEnd K) z)) p = (starRingEnd K) ((Polynomial.aeval z) p)
MulOpposite.instCommCStarAlgebra._proof_3
Mathlib.Analysis.CStarAlgebra.Classes
∀ {A : Type u_1} [inst : CommCStarAlgebra A], StarModule ℂ Aᵐᵒᵖ
CategoryTheory.GrothendieckTopology.Subcanonical.of_le
Mathlib.CategoryTheory.Sites.Canonical
∀ {C : Type u} [inst : CategoryTheory.Category.{v, u} C] {J K : CategoryTheory.GrothendieckTopology C}, J ≤ K → ∀ [K.Subcanonical], J.Subcanonical
ZNum.rec
Mathlib.Data.Num.Basic
{motive : ZNum → Sort u} → motive ZNum.zero → ((a : PosNum) → motive (ZNum.pos a)) → ((a : PosNum) → motive (ZNum.neg a)) → (t : ZNum) → motive t
CategoryTheory.LocalizerMorphism.RightResolution.Hom.noConfusion
Mathlib.CategoryTheory.Localization.Resolution
{P : Sort u} → {C₁ : Type u_1} → {C₂ : Type u_2} → {inst : CategoryTheory.Category.{v_1, u_1} C₁} → {inst_1 : CategoryTheory.Category.{v_2, u_2} C₂} → {W₁ : CategoryTheory.MorphismProperty C₁} → {W₂ : CategoryTheory.MorphismProperty C₂} → {Φ : CategoryTheory.LocalizerMorphism W₁ W₂} → {X₂ : C₂} → {R R' : Φ.RightResolution X₂} → {t : R.Hom R'} → {C₁' : Type u_1} → {C₂' : Type u_2} → {inst' : CategoryTheory.Category.{v_1, u_1} C₁'} → {inst'_1 : CategoryTheory.Category.{v_2, u_2} C₂'} → {W₁' : CategoryTheory.MorphismProperty C₁'} → {W₂' : CategoryTheory.MorphismProperty C₂'} → {Φ' : CategoryTheory.LocalizerMorphism W₁' W₂'} → {X₂' : C₂'} → {R'_1 R'' : Φ'.RightResolution X₂'} → {t' : R'_1.Hom R''} → C₁ = C₁' → C₂ = C₂' → inst ≍ inst' → inst_1 ≍ inst'_1 → W₁ ≍ W₁' → W₂ ≍ W₂' → Φ ≍ Φ' → X₂ ≍ X₂' → R ≍ R'_1 → R' ≍ R'' → t ≍ t' → CategoryTheory.LocalizerMorphism.RightResolution.Hom.noConfusionType P t t'
Nat.le_sub_of_add_le'
Init.Data.Nat.Lemmas
∀ {n k m : ℕ}, m + n ≤ k → n ≤ k - m
Mathlib.Tactic.Translate.TranslateData.mk.noConfusion
Mathlib.Tactic.Translate.Core
{P : Sort u} → {ignoreArgsAttr : Lean.NameMapExtension (List ℕ)} → {doTranslateAttr : Lean.NameMapExtension Bool} → {unfoldBoundaries? : Option Mathlib.Tactic.UnfoldBoundary.UnfoldBoundaryExt} → {translations : Lean.NameMapExtension Mathlib.Tactic.Translate.TranslationInfo} → {attrName : Lean.Name} → {changeNumeral isDual : Bool} → {guessNameData : Mathlib.Tactic.GuessName.GuessNameData} → {ignoreArgsAttr' : Lean.NameMapExtension (List ℕ)} → {doTranslateAttr' : Lean.NameMapExtension Bool} → {unfoldBoundaries?' : Option Mathlib.Tactic.UnfoldBoundary.UnfoldBoundaryExt} → {translations' : Lean.NameMapExtension Mathlib.Tactic.Translate.TranslationInfo} → {attrName' : Lean.Name} → {changeNumeral' isDual' : Bool} → {guessNameData' : Mathlib.Tactic.GuessName.GuessNameData} → { ignoreArgsAttr := ignoreArgsAttr, doTranslateAttr := doTranslateAttr, unfoldBoundaries? := unfoldBoundaries?, translations := translations, attrName := attrName, changeNumeral := changeNumeral, isDual := isDual, guessNameData := guessNameData } = { ignoreArgsAttr := ignoreArgsAttr', doTranslateAttr := doTranslateAttr', unfoldBoundaries? := unfoldBoundaries?', translations := translations', attrName := attrName', changeNumeral := changeNumeral', isDual := isDual', guessNameData := guessNameData' } → (ignoreArgsAttr = ignoreArgsAttr' → doTranslateAttr = doTranslateAttr' → unfoldBoundaries? = unfoldBoundaries?' → translations = translations' → attrName = attrName' → changeNumeral = changeNumeral' → isDual = isDual' → guessNameData = guessNameData' → P) → P
Action.instMonoidalForget._proof_2
Mathlib.CategoryTheory.Action.Monoidal
∀ (V : Type u_2) [inst : CategoryTheory.Category.{u_1, u_2} V] (G : Type u_3) [inst_1 : Monoid G] [inst_2 : CategoryTheory.MonoidalCategory V] {X Y : Action V G} (f : X ⟶ Y) (X' : Action V G), CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.whiskerRight ((Action.forget V G).map f) ((Action.forget V G).obj X')) (CategoryTheory.Iso.refl (CategoryTheory.MonoidalCategoryStruct.tensorObj ((Action.forget V G).obj Y) ((Action.forget V G).obj X'))).hom = CategoryTheory.CategoryStruct.comp (CategoryTheory.Iso.refl (CategoryTheory.MonoidalCategoryStruct.tensorObj ((Action.forget V G).obj X) ((Action.forget V G).obj X'))).hom ((Action.forget V G).map (CategoryTheory.MonoidalCategoryStruct.whiskerRight f X'))
AlgebraicIndependent.to_subtype_range
Mathlib.RingTheory.AlgebraicIndependent.Basic
∀ {ι : Type u} {R : Type u_2} {A : Type v} {x : ι → A} [inst : CommRing R] [inst_1 : CommRing A] [inst_2 : Algebra R A], AlgebraicIndependent R x → AlgebraicIndependent R Subtype.val
Decidable.decide.congr_simp
Init.SimpLemmas
∀ (p p_1 : Prop), p = p_1 → ∀ {h : Decidable p} [h_1 : Decidable p_1], decide p = decide p_1
IsLocalization.map_units
Mathlib.RingTheory.Localization.Defs
∀ {R : Type u_1} [inst : CommSemiring R] {M : Submonoid R} (S : Type u_2) [inst_1 : CommSemiring S] [inst_2 : Algebra R S] [IsLocalization M S] (y : ↥M), IsUnit ((algebraMap R S) ↑y)
MvPFunctor.B
Mathlib.Data.PFunctor.Multivariate.Basic
{n : ℕ} → (self : MvPFunctor.{u} n) → self.A → TypeVec.{u} n
Real.cos_sub_two_pi
Mathlib.Analysis.SpecialFunctions.Trigonometric.Basic
∀ (x : ℝ), Real.cos (x - 2 * Real.pi) = Real.cos x
AlgebraicGeometry.Scheme.Hom.asFiberHom._proof_1
Mathlib.AlgebraicGeometry.Fiber
∀ {X Y : AlgebraicGeometry.Scheme} (f : X ⟶ Y) (x : ↥X), CategoryTheory.Limits.HasPullback f (Y.fromSpecResidueField (f x))
_private.Mathlib.GroupTheory.Perm.Cycle.Type.0.Equiv.Perm.IsThreeCycle.nodup_iff_mem_support._proof_1_536
Mathlib.GroupTheory.Perm.Cycle.Type
∀ {α : Type u_1} [inst_1 : DecidableEq α] {g : Equiv.Perm α} {a : α} (w : α) (h : List.findIdxNth (fun x => decide (x = w)) [g (g a)] (List.idxOfNth w [g (g a)] 1) + 1 ≤ (List.filter (fun x => decide (x = w)) []).length), (List.findIdxs (fun x => decide (x = w)) [])[List.findIdxNth (fun x => decide (x = w)) [g (g a)] (List.idxOfNth w [g (g a)] 1)] < [].length