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import Mathlib.MeasureTheory.Measure.Dirac set_option autoImplicit true open Set open scoped ENNReal Classical variable [MeasurableSpace α] [MeasurableSpace β] {s : Set α} noncomputable section namespace MeasureTheory.Measure def count : Measure α := sum dirac #align measure_theory.measure.count MeasureTheo...
Mathlib/MeasureTheory/Measure/Count.lean
39
40
theorem count_apply (hs : MeasurableSet s) : count s = ∑' i : s, 1 := by
simp only [count, sum_apply, hs, dirac_apply', ← tsum_subtype s (1 : α → ℝ≥0∞), Pi.one_apply]
1
2.718282
0
1.1
10
1,189
import Mathlib.Algebra.Category.GroupCat.Basic import Mathlib.CategoryTheory.SingleObj import Mathlib.CategoryTheory.Limits.FunctorCategory import Mathlib.CategoryTheory.Limits.Preserves.Basic import Mathlib.CategoryTheory.Adjunction.Limits import Mathlib.CategoryTheory.Conj #align_import representation_theory.Action...
Mathlib/RepresentationTheory/Action/Basic.lean
50
50
theorem ρ_one {G : MonCat.{u}} (A : Action V G) : A.ρ 1 = 𝟙 A.V := by
rw [MonoidHom.map_one]; rfl
1
2.718282
0
0
1
202
import Mathlib.Algebra.Bounds import Mathlib.Algebra.Order.Field.Basic -- Porting note: `LinearOrderedField`, etc import Mathlib.Data.Set.Pointwise.SMul #align_import algebra.order.pointwise from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" open Function Set open Pointwise variable ...
Mathlib/Algebra/Order/Pointwise.lean
160
162
theorem csSup_div (hs₀ : s.Nonempty) (hs₁ : BddAbove s) (ht₀ : t.Nonempty) (ht₁ : BddBelow t) : sSup (s / t) = sSup s / sInf t := by
rw [div_eq_mul_inv, csSup_mul hs₀ hs₁ ht₀.inv ht₁.inv, csSup_inv ht₀ ht₁, div_eq_mul_inv]
1
2.718282
0
1.25
16
1,340
import Mathlib.Analysis.SpecialFunctions.Complex.Log #align_import analysis.special_functions.pow.complex from "leanprover-community/mathlib"@"4fa54b337f7d52805480306db1b1439c741848c8" open scoped Classical open Real Topology Filter ComplexConjugate Finset Set namespace Complex noncomputable def cpow (x y : ℂ) ...
Mathlib/Analysis/SpecialFunctions/Pow/Complex.lean
107
108
theorem cpow_sub {x : ℂ} (y z : ℂ) (hx : x ≠ 0) : x ^ (y - z) = x ^ y / x ^ z := by
rw [sub_eq_add_neg, cpow_add _ _ hx, cpow_neg, div_eq_mul_inv]
1
2.718282
0
0.636364
11
551
import Mathlib.FieldTheory.RatFunc.Defs import Mathlib.RingTheory.EuclideanDomain import Mathlib.RingTheory.Localization.FractionRing import Mathlib.RingTheory.Polynomial.Content #align_import field_theory.ratfunc from "leanprover-community/mathlib"@"bf9bbbcf0c1c1ead18280b0d010e417b10abb1b6" universe u v noncompu...
Mathlib/FieldTheory/RatFunc/Basic.lean
89
91
theorem ofFractionRing_add (p q : FractionRing K[X]) : ofFractionRing (p + q) = ofFractionRing p + ofFractionRing q := by
simp only [HAdd.hAdd, Add.add, RatFunc.add]
1
2.718282
0
0.416667
12
404
import Mathlib.Algebra.BigOperators.WithTop import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Data.ENNReal.Basic #align_import data.real.ennreal from "leanprover-community/mathlib"@"c14c8fcde993801fca8946b0d80131a1a81d1520" open Set NNReal ENNReal namespace ENNReal variable {a b c d : ℝ≥0∞} {r p q...
Mathlib/Data/ENNReal/Operations.lean
212
212
theorem top_mul' : ∞ * a = if a = 0 then 0 else ∞ := by
convert WithTop.top_mul' a
1
2.718282
0
0.666667
12
570
import Mathlib.Analysis.SpecialFunctions.Complex.Arg import Mathlib.Analysis.SpecialFunctions.Log.Basic #align_import analysis.special_functions.complex.log from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section namespace Complex open Set Filter Bornology open scop...
Mathlib/Analysis/SpecialFunctions/Complex/Log.lean
42
42
theorem log_im_le_pi (x : ℂ) : (log x).im ≤ π := by
simp only [log_im, arg_le_pi]
1
2.718282
0
0.375
16
378
import Mathlib.Algebra.Order.EuclideanAbsoluteValue import Mathlib.Algebra.Order.Group.Basic import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Algebra.Polynomial.FieldDivision #align_import data.polynomial.degree.card_pow_degree from "leanprover-community/mathlib"@"85d9f2189d9489f9983c0d01536575b0233bd305" n...
Mathlib/Algebra/Polynomial/Degree/CardPowDegree.lean
79
83
theorem cardPowDegree_apply [DecidableEq Fq] (p : Fq[X]) : cardPowDegree p = if p = 0 then 0 else (Fintype.card Fq : ℤ) ^ natDegree p := by
rw [cardPowDegree] dsimp convert rfl
3
20.085537
1
1
1
1,162
import Mathlib.RingTheory.WittVector.Frobenius import Mathlib.RingTheory.WittVector.Verschiebung import Mathlib.RingTheory.WittVector.MulP #align_import ring_theory.witt_vector.identities from "leanprover-community/mathlib"@"0798037604b2d91748f9b43925fb7570a5f3256c" namespace WittVector variable {p : ℕ} {R : Typ...
Mathlib/RingTheory/WittVector/Identities.lean
119
121
theorem mul_charP_coeff_succ [CharP R p] (x : 𝕎 R) (i : ℕ) : (x * p).coeff (i + 1) = x.coeff i ^ p := by
rw [← frobenius_verschiebung, coeff_frobenius_charP, verschiebung_coeff_succ]
1
2.718282
0
1
13
1,103
import Mathlib.GroupTheory.CoprodI import Mathlib.GroupTheory.Coprod.Basic import Mathlib.GroupTheory.QuotientGroup import Mathlib.GroupTheory.Complement namespace Monoid open CoprodI Subgroup Coprod Function List variable {ι : Type*} {G : ι → Type*} {H : Type*} {K : Type*} [Monoid K] def PushoutI.con [∀ i, Mo...
Mathlib/GroupTheory/PushoutI.lean
163
165
theorem ofCoprodI_of (i : ι) (g : G i) : (ofCoprodI (CoprodI.of g) : PushoutI φ) = of i g := by
simp [ofCoprodI]
1
2.718282
0
1
6
991
import Mathlib.Algebra.Group.ConjFinite import Mathlib.GroupTheory.Perm.Fin import Mathlib.GroupTheory.Subgroup.Simple import Mathlib.Tactic.IntervalCases #align_import group_theory.specific_groups.alternating from "leanprover-community/mathlib"@"0f6670b8af2dff699de1c0b4b49039b31bc13c46" -- An example on how to de...
Mathlib/GroupTheory/SpecificGroups/Alternating.lean
89
91
theorem finRotate_bit1_mem_alternatingGroup {n : ℕ} : finRotate (bit1 n) ∈ alternatingGroup (Fin (bit1 n)) := by
rw [mem_alternatingGroup, bit1, sign_finRotate, pow_bit0', Int.units_mul_self, one_pow]
1
2.718282
0
1.25
4
1,331
import Mathlib.MeasureTheory.OuterMeasure.OfFunction import Mathlib.MeasureTheory.PiSystem #align_import measure_theory.measure.outer_measure from "leanprover-community/mathlib"@"343e80208d29d2d15f8050b929aa50fe4ce71b55" noncomputable section open Set Function Filter open scoped Classical NNReal Topology ENNReal ...
Mathlib/MeasureTheory/OuterMeasure/Caratheodory.lean
82
84
theorem measure_inter_union (h : s₁ ∩ s₂ ⊆ ∅) (h₁ : IsCaratheodory m s₁) {t : Set α} : m (t ∩ (s₁ ∪ s₂)) = m (t ∩ s₁) + m (t ∩ s₂) := by
rw [h₁, Set.inter_assoc, Set.union_inter_cancel_left, inter_diff_assoc, union_diff_cancel_left h]
1
2.718282
0
0.6
5
530
import Mathlib.Order.Interval.Set.UnorderedInterval import Mathlib.Algebra.Order.Interval.Set.Monoid import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Algebra.Order.Field.Basic import Mathlib.Algebra.Order.Group.MinMax #align_import data.set.pointwise.interval from "leanprover-community/mathlib"@"2196ab363eb097c...
Mathlib/Data/Set/Pointwise/Interval.lean
663
664
theorem preimage_mul_const_Ioo_of_neg (a b : α) {c : α} (h : c < 0) : (fun x => x * c) ⁻¹' Ioo a b = Ioo (b / c) (a / c) := by
simp [← Ioi_inter_Iio, h, inter_comm]
1
2.718282
0
0.37931
29
381
import Mathlib.AlgebraicTopology.SplitSimplicialObject import Mathlib.AlgebraicTopology.DoldKan.Degeneracies import Mathlib.AlgebraicTopology.DoldKan.FunctorN #align_import algebraic_topology.dold_kan.split_simplicial_object from "leanprover-community/mathlib"@"32a7e535287f9c73f2e4d2aef306a39190f0b504" open Categ...
Mathlib/AlgebraicTopology/DoldKan/SplitSimplicialObject.lean
47
49
theorem cofan_inj_πSummand_eq_id [HasZeroMorphisms C] {Δ : SimplexCategoryᵒᵖ} (A : IndexSet Δ) : (s.cofan Δ).inj A ≫ s.πSummand A = 𝟙 _ := by
simp [πSummand]
1
2.718282
0
1.428571
7
1,516
import Mathlib.MeasureTheory.Integral.IntervalIntegral import Mathlib.Analysis.Calculus.Deriv.ZPow import Mathlib.Analysis.NormedSpace.Pointwise import Mathlib.Analysis.SpecialFunctions.NonIntegrable import Mathlib.Analysis.Analytic.Basic #align_import measure_theory.integral.circle_integral from "leanprover-communit...
Mathlib/MeasureTheory/Integral/CircleIntegral.lean
114
114
theorem abs_circleMap_zero (R : ℝ) (θ : ℝ) : abs (circleMap 0 R θ) = |R| := by
simp [circleMap]
1
2.718282
0
0.333333
9
352
import Mathlib.Topology.Category.TopCat.Opens import Mathlib.Data.Set.Subsingleton #align_import topology.category.Top.open_nhds from "leanprover-community/mathlib"@"1ec4876214bf9f1ddfbf97ae4b0d777ebd5d6938" open CategoryTheory TopologicalSpace Opposite universe u variable {X Y : TopCat.{u}} (f : X ⟶ Y) namesp...
Mathlib/Topology/Category/TopCat/OpenNhds.lean
129
129
theorem op_map_id_obj (x : X) (U : (OpenNhds x)ᵒᵖ) : (map (𝟙 X) x).op.obj U = U := by
simp
1
2.718282
0
0
2
94
import Mathlib.Order.Interval.Set.UnorderedInterval import Mathlib.Algebra.Order.Interval.Set.Monoid import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Algebra.Order.Field.Basic import Mathlib.Algebra.Order.Group.MinMax #align_import data.set.pointwise.interval from "leanprover-community/mathlib"@"2196ab363eb097c...
Mathlib/Data/Set/Pointwise/Interval.lean
237
237
theorem preimage_neg_Icc : -Icc a b = Icc (-b) (-a) := by
simp [← Ici_inter_Iic, inter_comm]
1
2.718282
0
0.37931
29
381
import Mathlib.Algebra.Group.Defs import Mathlib.Algebra.GroupWithZero.Defs import Mathlib.Data.Int.Cast.Defs import Mathlib.Tactic.Spread import Mathlib.Util.AssertExists #align_import algebra.ring.defs from "leanprover-community/mathlib"@"76de8ae01554c3b37d66544866659ff174e66e1f" universe u v w x variable {α : ...
Mathlib/Algebra/Ring/Defs.lean
94
95
theorem distrib_three_right [Mul R] [Add R] [RightDistribClass R] (a b c d : R) : (a + b + c) * d = a * d + b * d + c * d := by
simp [right_distrib]
1
2.718282
0
0.181818
11
267
import Mathlib.MeasureTheory.Function.StronglyMeasurable.Lp import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.Order.Filter.IndicatorFunction import Mathlib.MeasureTheory.Function.StronglyMeasurable.Inner import Mathlib.MeasureTheory.Function.LpSeminorm.Trim #align_import measure_theory.function.conditional...
Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean
62
64
theorem congr (hf : AEStronglyMeasurable' m f μ) (hfg : f =ᵐ[μ] g) : AEStronglyMeasurable' m g μ := by
obtain ⟨f', hf'_meas, hff'⟩ := hf; exact ⟨f', hf'_meas, hfg.symm.trans hff'⟩
1
2.718282
0
1.142857
7
1,222
import Mathlib.Algebra.Associated import Mathlib.Algebra.Ring.Regular import Mathlib.Tactic.Common #align_import algebra.gcd_monoid.basic from "leanprover-community/mathlib"@"550b58538991c8977703fdeb7c9d51a5aa27df11" variable {α : Type*} -- Porting note: mathlib3 had a `@[protect_proj]` here, but adding `protect...
Mathlib/Algebra/GCDMonoid/Basic.lean
148
148
theorem normalize_coe_units (u : αˣ) : normalize (u : α) = 1 := by
simp
1
2.718282
0
1
4
809
import Mathlib.Analysis.Convex.Hull #align_import analysis.convex.join from "leanprover-community/mathlib"@"951bf1d9e98a2042979ced62c0620bcfb3587cf8" open Set variable {ι : Sort*} {𝕜 E : Type*} section OrderedSemiring variable (𝕜) [OrderedSemiring 𝕜] [AddCommMonoid E] [Module 𝕜 E] {s t s₁ s₂ t₁ t₂ u : Set ...
Mathlib/Analysis/Convex/Join.lean
98
100
theorem convexJoin_iUnion_right (s : Set E) (t : ι → Set E) : convexJoin 𝕜 s (⋃ i, t i) = ⋃ i, convexJoin 𝕜 s (t i) := by
simp_rw [convexJoin_comm s, convexJoin_iUnion_left]
1
2.718282
0
0.1
10
244
import Mathlib.Data.Stream.Init import Mathlib.Tactic.Common #align_import data.seq.computation from "leanprover-community/mathlib"@"1f0096e6caa61e9c849ec2adbd227e960e9dff58" open Function universe u v w def Computation (α : Type u) : Type u := { f : Stream' (Option α) // ∀ ⦃n a⦄, f n = some a → f (n + 1) = ...
Mathlib/Data/Seq/Computation.lean
175
176
theorem tail_think (s : Computation α) : tail (think s) = s := by
cases' s with f al; apply Subtype.eq; dsimp [tail, think]
1
2.718282
0
1.333333
3
1,401
import Mathlib.Analysis.SpecialFunctions.Pow.Real import Mathlib.Data.Int.Log #align_import analysis.special_functions.log.base from "leanprover-community/mathlib"@"f23a09ce6d3f367220dc3cecad6b7eb69eb01690" open Set Filter Function open Topology noncomputable section namespace Real variable {b x y : ℝ} -- @...
Mathlib/Analysis/SpecialFunctions/Log/Base.lean
53
53
theorem logb_one : logb b 1 = 0 := by
simp [logb]
1
2.718282
0
0.25
20
300
import Batteries.Data.List.Lemmas import Batteries.Data.Array.Basic import Batteries.Tactic.SeqFocus import Batteries.Util.ProofWanted namespace Array theorem forIn_eq_data_forIn [Monad m] (as : Array α) (b : β) (f : α → β → m (ForInStep β)) : forIn as b f = forIn as.data b f := by let rec loop : ∀ {i h b ...
.lake/packages/batteries/Batteries/Data/Array/Lemmas.lean
75
77
theorem size_zipWith (as : Array α) (bs : Array β) (f : α → β → γ) : (as.zipWith bs f).size = min as.size bs.size := by
rw [size_eq_length_data, zipWith_eq_zipWith_data, List.length_zipWith]
1
2.718282
0
1.5
6
1,680
import Mathlib.Data.Set.Image import Mathlib.Order.Interval.Set.Basic #align_import data.set.intervals.with_bot_top from "leanprover-community/mathlib"@"d012cd09a9b256d870751284dd6a29882b0be105" open Set variable {α : Type*} namespace WithTop @[simp] theorem preimage_coe_top : (some : α → WithTop α) ⁻¹' {⊤} =...
Mathlib/Order/Interval/Set/WithBotTop.lean
71
71
theorem preimage_coe_Ioo : (some : α → WithTop α) ⁻¹' Ioo a b = Ioo a b := by
simp [← Ioi_inter_Iio]
1
2.718282
0
0.4
15
401
import Mathlib.Algebra.Order.Monoid.Defs import Mathlib.Algebra.Order.Sub.Defs import Mathlib.Util.AssertExists #align_import algebra.order.group.defs from "leanprover-community/mathlib"@"b599f4e4e5cf1fbcb4194503671d3d9e569c1fce" open Function universe u variable {α : Type u} class OrderedAddCommGroup (α : Ty...
Mathlib/Algebra/Order/Group/Defs.lean
178
179
theorem inv_mul_lt_iff_lt_mul : b⁻¹ * a < c ↔ a < b * c := by
rw [← mul_lt_mul_iff_left b, mul_inv_cancel_left]
1
2.718282
0
0.4
25
400
import Mathlib.CategoryTheory.Preadditive.AdditiveFunctor import Mathlib.CategoryTheory.Monoidal.Functor #align_import category_theory.monoidal.preadditive from "leanprover-community/mathlib"@"986c4d5761f938b2e1c43c01f001b6d9d88c2055" noncomputable section open scoped Classical namespace CategoryTheory open Cat...
Mathlib/CategoryTheory/Monoidal/Preadditive.lean
118
120
theorem sum_tensor {P Q R S : C} {J : Type*} (s : Finset J) (f : P ⟶ Q) (g : J → (R ⟶ S)) : (∑ j ∈ s, g j) ⊗ f = ∑ j ∈ s, g j ⊗ f := by
simp only [tensorHom_def, sum_whiskerRight, Preadditive.sum_comp]
1
2.718282
0
0.5
8
481
import Mathlib.Order.Filter.Bases #align_import order.filter.pi from "leanprover-community/mathlib"@"ce64cd319bb6b3e82f31c2d38e79080d377be451" open Set Function open scoped Classical open Filter namespace Filter variable {ι : Type*} {α : ι → Type*} {f f₁ f₂ : (i : ι) → Filter (α i)} {s : (i : ι) → Set (α i)} ...
Mathlib/Order/Filter/Pi.lean
51
53
theorem tendsto_pi {β : Type*} {m : β → ∀ i, α i} {l : Filter β} : Tendsto m l (pi f) ↔ ∀ i, Tendsto (fun x => m x i) l (f i) := by
simp only [pi, tendsto_iInf, tendsto_comap_iff]; rfl
1
2.718282
0
0.666667
12
565
import Mathlib.AlgebraicGeometry.Morphisms.QuasiCompact import Mathlib.Topology.QuasiSeparated #align_import algebraic_geometry.morphisms.quasi_separated from "leanprover-community/mathlib"@"1a51edf13debfcbe223fa06b1cb353b9ed9751cc" noncomputable section open CategoryTheory CategoryTheory.Limits Opposite Topolog...
Mathlib/AlgebraicGeometry/Morphisms/QuasiSeparated.lean
121
123
theorem quasi_compact_affineProperty_diagonal_eq : QuasiCompact.affineProperty.diagonal = QuasiSeparated.affineProperty := by
funext; rw [quasi_compact_affineProperty_iff_quasiSeparatedSpace]; rfl
1
2.718282
0
0.833333
6
726
import Mathlib.Order.Filter.Prod #align_import order.filter.n_ary from "leanprover-community/mathlib"@"78f647f8517f021d839a7553d5dc97e79b508dea" open Function Set open Filter namespace Filter variable {α α' β β' γ γ' δ δ' ε ε' : Type*} {m : α → β → γ} {f f₁ f₂ : Filter α} {g g₁ g₂ : Filter β} {h h₁ h₂ : Filt...
Mathlib/Order/Filter/NAry.lean
53
55
theorem map_prod_eq_map₂ (m : α → β → γ) (f : Filter α) (g : Filter β) : Filter.map (fun p : α × β => m p.1 p.2) (f ×ˢ g) = map₂ m f g := by
rw [map₂, copy_eq, uncurry_def]
1
2.718282
0
0
5
17
import Mathlib.Algebra.GroupPower.IterateHom import Mathlib.Algebra.Polynomial.Eval import Mathlib.GroupTheory.GroupAction.Ring #align_import data.polynomial.derivative from "leanprover-community/mathlib"@"bbeb185db4ccee8ed07dc48449414ebfa39cb821" noncomputable section open Finset open Polynomial namespace Pol...
Mathlib/Algebra/Polynomial/Derivative.lean
92
93
theorem derivative_C_mul_X (a : R) : derivative (C a * X) = C a := by
simp [C_mul_X_eq_monomial, derivative_monomial, Nat.cast_one, mul_one]
1
2.718282
0
0.3
10
317
import Mathlib.RingTheory.LocalProperties import Mathlib.RingTheory.Localization.InvSubmonoid #align_import ring_theory.ring_hom.finite_type from "leanprover-community/mathlib"@"64fc7238fb41b1a4f12ff05e3d5edfa360dd768c" namespace RingHom open scoped Pointwise theorem finiteType_stableUnderComposition : StableUn...
Mathlib/RingTheory/RingHom/FiniteType.lean
38
91
theorem finiteType_ofLocalizationSpanTarget : OfLocalizationSpanTarget @FiniteType := by
-- Setup algebra intances. rw [ofLocalizationSpanTarget_iff_finite] introv R hs H classical letI := f.toAlgebra replace H : ∀ r : s, Algebra.FiniteType R (Localization.Away (r : S)) := by intro r; simp_rw [RingHom.FiniteType] at H; convert H r; ext; simp_rw [Algebra.smul_def]; rfl replace H := fun r ...
53
104,137,594,330,290,870,000,000
2
1.666667
3
1,774
import Mathlib.Algebra.Algebra.Operations import Mathlib.Data.Fintype.Lattice import Mathlib.RingTheory.Coprime.Lemmas #align_import ring_theory.ideal.operations from "leanprover-community/mathlib"@"e7f0ddbf65bd7181a85edb74b64bdc35ba4bdc74" assert_not_exists Basis -- See `RingTheory.Ideal.Basis` assert_not_exists ...
Mathlib/RingTheory/Ideal/Operations.lean
99
100
theorem mem_annihilator_span_singleton (g : M) (r : R) : r ∈ (Submodule.span R ({g} : Set M)).annihilator ↔ r • g = 0 := by
simp [mem_annihilator_span]
1
2.718282
0
0.5
4
467
import Mathlib.Analysis.SpecialFunctions.Exp import Mathlib.Data.Nat.Factorization.Basic import Mathlib.Analysis.NormedSpace.Real #align_import analysis.special_functions.log.basic from "leanprover-community/mathlib"@"f23a09ce6d3f367220dc3cecad6b7eb69eb01690" open Set Filter Function open Topology noncomputable ...
Mathlib/Analysis/SpecialFunctions/Log/Basic.lean
111
111
theorem log_neg_eq_log (x : ℝ) : log (-x) = log x := by
rw [← log_abs x, ← log_abs (-x), abs_neg]
1
2.718282
0
0.583333
12
525
import Mathlib.Data.Int.Defs import Mathlib.Data.Nat.Defs import Mathlib.Tactic.Common #align_import data.int.sqrt from "leanprover-community/mathlib"@"ba2245edf0c8bb155f1569fd9b9492a9b384cde6" namespace Int -- @[pp_nodot] porting note: unknown attribute def sqrt (z : ℤ) : ℤ := Nat.sqrt <| Int.toNat z #align ...
Mathlib/Data/Int/Sqrt.lean
30
31
theorem sqrt_eq (n : ℤ) : sqrt (n * n) = n.natAbs := by
rw [sqrt, ← natAbs_mul_self, toNat_natCast, Nat.sqrt_eq]
1
2.718282
0
0
1
29
import Mathlib.Algebra.Field.Basic import Mathlib.Algebra.GroupWithZero.Units.Equiv import Mathlib.Algebra.Order.Field.Defs import Mathlib.Algebra.Order.Ring.Abs import Mathlib.Order.Bounds.OrderIso import Mathlib.Tactic.Positivity.Core #align_import algebra.order.field.basic from "leanprover-community/mathlib"@"8477...
Mathlib/Algebra/Order/Field/Basic.lean
638
639
theorem div_nonneg_iff : 0 ≤ a / b ↔ 0 ≤ a ∧ 0 ≤ b ∨ a ≤ 0 ∧ b ≤ 0 := by
simp [division_def, mul_nonneg_iff]
1
2.718282
0
0.25
16
288
import Mathlib.Algebra.Group.Support import Mathlib.Algebra.Order.Monoid.WithTop import Mathlib.Data.Nat.Cast.Field #align_import algebra.char_zero.lemmas from "leanprover-community/mathlib"@"acee671f47b8e7972a1eb6f4eed74b4b3abce829" open Function Set section AddMonoidWithOne variable {α M : Type*} [AddMonoidWith...
Mathlib/Algebra/CharZero/Lemmas.lean
182
182
theorem add_halves' (a : R) : a / 2 + a / 2 = a := by
rw [← add_div, half_add_self]
1
2.718282
0
0.5
12
426
import Mathlib.Algebra.DirectSum.Module import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.Convex.Uniform import Mathlib.Analysis.NormedSpace.Completion import Mathlib.Analysis.NormedSpace.BoundedLinearMaps #align_import analysis.inner_product_space.basic from "leanprover-community/mathlib"@"3f655f5297b030...
Mathlib/Analysis/InnerProductSpace/Basic.lean
229
229
theorem inner_re_symm (x y : F) : re ⟪x, y⟫ = re ⟪y, x⟫ := by
rw [← inner_conj_symm, conj_re]
1
2.718282
0
0.5
6
449
import Mathlib.Probability.ConditionalProbability import Mathlib.MeasureTheory.Measure.Count #align_import probability.cond_count from "leanprover-community/mathlib"@"117e93f82b5f959f8193857370109935291f0cc4" noncomputable section open ProbabilityTheory open MeasureTheory MeasurableSpace namespace ProbabilityT...
Mathlib/Probability/CondCount.lean
100
101
theorem condCount_inter_self (hs : s.Finite) : condCount s (s ∩ t) = condCount s t := by
rw [condCount, cond_inter_self _ hs.measurableSet]
1
2.718282
0
1.166667
12
1,231
import Mathlib.Algebra.Group.Hom.End import Mathlib.Algebra.Ring.Invertible import Mathlib.Algebra.SMulWithZero import Mathlib.Data.Int.Cast.Lemmas import Mathlib.GroupTheory.GroupAction.Units #align_import algebra.module.basic from "leanprover-community/mathlib"@"30413fc89f202a090a54d78e540963ed3de0056e" assert_n...
Mathlib/Algebra/Module/Defs.lean
97
98
theorem Convex.combo_self {a b : R} (h : a + b = 1) (x : M) : a • x + b • x = x := by
rw [← add_smul, h, one_smul]
1
2.718282
0
0.333333
3
357
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Degree.Lemmas import Mathlib.Algebra.Polynomial.Monic #align_import data.polynomial.integral_normalization from "leanprover-community/mathlib"@"6f401acf4faec3ab9ab13a42789c4f68064a61cd" open Polynomial namespace Polynomial universe u...
Mathlib/RingTheory/Polynomial/IntegralNormalization.lean
62
63
theorem integralNormalization_coeff_degree {f : R[X]} {i : ℕ} (hi : f.degree = i) : (integralNormalization f).coeff i = 1 := by
rw [integralNormalization_coeff, if_pos hi]
1
2.718282
0
0.4
5
386
import Mathlib.CategoryTheory.Adjunction.Unique import Mathlib.CategoryTheory.Adjunction.FullyFaithful import Mathlib.CategoryTheory.Sites.Sheaf import Mathlib.CategoryTheory.Limits.Preserves.Finite universe v₁ v₂ u₁ u₂ namespace CategoryTheory open Limits variable {C : Type u₁} [Category.{v₁} C] (J : Grothendiec...
Mathlib/CategoryTheory/Sites/Sheafification.lean
100
102
theorem sheafifyMap_comp {P Q R : Cᵒᵖ ⥤ D} (η : P ⟶ Q) (γ : Q ⟶ R) : sheafifyMap J (η ≫ γ) = sheafifyMap J η ≫ sheafifyMap J γ := by
simp [sheafifyMap, sheafify]
1
2.718282
0
0.666667
3
614
import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Data.Set.MulAntidiagonal #align_import data.finset.mul_antidiagonal from "leanprover-community/mathlib"@"0a0ec35061ed9960bf0e7ffb0335f44447b58977" namespace Finset open Pointwise variable {α : Type*} variable [OrderedCancelCommMonoid α] {s t : Set α} (hs : ...
Mathlib/Data/Finset/MulAntidiagonal.lean
72
73
theorem mem_mulAntidiagonal : x ∈ mulAntidiagonal hs ht a ↔ x.1 ∈ s ∧ x.2 ∈ t ∧ x.1 * x.2 = a := by
simp only [mulAntidiagonal, Set.Finite.mem_toFinset, Set.mem_mulAntidiagonal]
1
2.718282
0
1
4
1,150
import Mathlib.Order.Cover import Mathlib.Order.Interval.Finset.Defs #align_import data.finset.locally_finite from "leanprover-community/mathlib"@"442a83d738cb208d3600056c489be16900ba701d" assert_not_exists MonoidWithZero assert_not_exists Finset.sum open Function OrderDual open FinsetInterval variable {ι α : T...
Mathlib/Order/Interval/Finset/Basic.lean
94
95
theorem Ioo_eq_empty_iff [DenselyOrdered α] : Ioo a b = ∅ ↔ ¬a < b := by
rw [← coe_eq_empty, coe_Ioo, Set.Ioo_eq_empty_iff]
1
2.718282
0
0
12
11
import Mathlib.MeasureTheory.Measure.Content import Mathlib.MeasureTheory.Group.Prod import Mathlib.Topology.Algebra.Group.Compact #align_import measure_theory.measure.haar.basic from "leanprover-community/mathlib"@"fd5edc43dc4f10b85abfe544b88f82cf13c5f844" noncomputable section open Set Inv Function Topological...
Mathlib/MeasureTheory/Measure/Haar/Basic.lean
128
129
theorem prehaar_nonneg (K₀ : PositiveCompacts G) {U : Set G} (K : Compacts G) : 0 ≤ prehaar (K₀ : Set G) U K := by
apply div_nonneg <;> norm_cast <;> apply zero_le
1
2.718282
0
0.428571
7
407
import Mathlib.Data.Complex.Module import Mathlib.Data.Complex.Order import Mathlib.Data.Complex.Exponential import Mathlib.Analysis.RCLike.Basic import Mathlib.Topology.Algebra.InfiniteSum.Module import Mathlib.Topology.Instances.RealVectorSpace #align_import analysis.complex.basic from "leanprover-community/mathlib...
Mathlib/Analysis/Complex/Basic.lean
149
150
theorem nndist_self_conj (z : ℂ) : nndist z (conj z) = 2 * Real.nnabs z.im := by
rw [nndist_comm, nndist_conj_self]
1
2.718282
0
0.222222
9
282
import Mathlib.Algebra.ContinuedFractions.Basic import Mathlib.Algebra.GroupWithZero.Basic #align_import algebra.continued_fractions.translations from "leanprover-community/mathlib"@"a7e36e48519ab281320c4d192da6a7b348ce40ad" namespace GeneralizedContinuedFraction section General variable {α : Type*} {g : Gen...
Mathlib/Algebra/ContinuedFractions/Translations.lean
45
46
theorem terminatedAt_iff_part_num_none : g.TerminatedAt n ↔ g.partialNumerators.get? n = none := by
rw [terminatedAt_iff_s_none, part_num_none_iff_s_none]
1
2.718282
0
0.052632
19
240
import Mathlib.CategoryTheory.Preadditive.AdditiveFunctor import Mathlib.CategoryTheory.Linear.Basic #align_import category_theory.linear.linear_functor from "leanprover-community/mathlib"@"829895f162a1f29d0133f4b3538f4cd1fb5bffd3" namespace CategoryTheory variable (R : Type*) [Semiring R] class Functor.Linear...
Mathlib/CategoryTheory/Linear/LinearFunctor.lean
53
54
theorem map_units_smul {X Y : C} (r : Rˣ) (f : X ⟶ Y) : F.map (r • f) = r • F.map f := by
apply map_smul
1
2.718282
0
0
1
0
import Mathlib.Analysis.SpecialFunctions.Pow.Real #align_import analysis.special_functions.pow.nnreal from "leanprover-community/mathlib"@"4fa54b337f7d52805480306db1b1439c741848c8" noncomputable section open scoped Classical open Real NNReal ENNReal ComplexConjugate open Finset Function Set namespace NNReal var...
Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean
97
97
theorem rpow_neg_one (x : ℝ≥0) : x ^ (-1 : ℝ) = x⁻¹ := by
simp [rpow_neg]
1
2.718282
0
0.4
5
399
import Mathlib.Algebra.Ring.Divisibility.Basic import Mathlib.Init.Data.Ordering.Lemmas import Mathlib.SetTheory.Ordinal.Principal import Mathlib.Tactic.NormNum #align_import set_theory.ordinal.notation from "leanprover-community/mathlib"@"b67044ba53af18680e1dd246861d9584e968495d" set_option linter.uppercaseLean3 ...
Mathlib/SetTheory/Ordinal/Notation.lean
150
150
theorem repr_ofNat (n : ℕ) : repr (ofNat n) = n := by
cases n <;> simp
1
2.718282
0
0.5
2
437
import Mathlib.Algebra.Lie.Matrix import Mathlib.LinearAlgebra.Matrix.SesquilinearForm import Mathlib.Tactic.NoncommRing #align_import algebra.lie.skew_adjoint from "leanprover-community/mathlib"@"075b3f7d19b9da85a0b54b3e33055a74fc388dec" universe u v w w₁ section SkewAdjointEndomorphisms open LinearMap (BilinF...
Mathlib/Algebra/Lie/SkewAdjoint.lean
84
86
theorem skewAdjointLieSubalgebraEquiv_symm_apply (f : skewAdjointLieSubalgebra B) : ↑((skewAdjointLieSubalgebraEquiv B e).symm f) = e.symm.lieConj f := by
simp [skewAdjointLieSubalgebraEquiv]
1
2.718282
0
1
6
968
import Mathlib.Order.Interval.Set.Basic import Mathlib.Order.Hom.Set #align_import data.set.intervals.order_iso from "leanprover-community/mathlib"@"d012cd09a9b256d870751284dd6a29882b0be105" open Set namespace OrderIso section Preorder variable {α β : Type*} [Preorder α] [Preorder β] @[simp] theorem preimage_I...
Mathlib/Order/Interval/Set/OrderIso.lean
63
64
theorem preimage_Ioo (e : α ≃o β) (a b : β) : e ⁻¹' Ioo a b = Ioo (e.symm a) (e.symm b) := by
simp [← Ioi_inter_Iio]
1
2.718282
0
0.285714
14
310
import Mathlib.Logic.UnivLE import Mathlib.SetTheory.Ordinal.Basic set_option autoImplicit true noncomputable section open Cardinal theorem univLE_iff_cardinal_le : UnivLE.{u, v} ↔ univ.{u, v+1} ≤ univ.{v, u+1} := by rw [← not_iff_not, UnivLE]; simp_rw [small_iff_lift_mk_lt_univ]; push_neg -- strange: simp_r...
Mathlib/SetTheory/Cardinal/UnivLE.lean
30
31
theorem univLE_total : UnivLE.{u, v} ∨ UnivLE.{v, u} := by
simp_rw [univLE_iff_cardinal_le]; apply le_total
1
2.718282
0
1
2
808
import Mathlib.Algebra.Homology.HomologicalComplex import Mathlib.CategoryTheory.DifferentialObject #align_import algebra.homology.differential_object from "leanprover-community/mathlib"@"b535c2d5d996acd9b0554b76395d9c920e186f4f" open CategoryTheory CategoryTheory.Limits open scoped Classical noncomputable secti...
Mathlib/Algebra/Homology/DifferentialObject.lean
61
62
theorem eqToHom_f' {X Y : DifferentialObject ℤ (GradedObjectWithShift b V)} (f : X ⟶ Y) {x y : β} (h : x = y) : X.objEqToHom h ≫ f.f y = f.f x ≫ Y.objEqToHom h := by
cases h; simp
1
2.718282
0
0
3
170
import Mathlib.Algebra.ModEq import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Order.Archimedean import Mathlib.Algebra.Periodic import Mathlib.Data.Int.SuccPred import Mathlib.GroupTheory.QuotientGroup import Mathlib.Order.Circular import Mathlib.Data.List.TFAE import Mathlib.Data.Set.Lattice #align_import a...
Mathlib/Algebra/Order/ToIntervalMod.lean
123
124
theorem toIcoDiv_zsmul_sub_self (a b : α) : toIcoDiv hp a b • p - b = -toIcoMod hp a b := by
rw [toIcoMod, neg_sub]
1
2.718282
0
0.2
5
281
import Mathlib.Order.ConditionallyCompleteLattice.Basic import Mathlib.Order.RelIso.Basic #align_import order.ord_continuous from "leanprover-community/mathlib"@"207cfac9fcd06138865b5d04f7091e46d9320432" universe u v w x variable {α : Type u} {β : Type v} {γ : Type w} {ι : Sort x} open Function OrderDual Set ...
Mathlib/Order/OrdContinuous.lean
102
103
theorem lt_iff (hf : LeftOrdContinuous f) (h : Injective f) {x y} : f x < f y ↔ x < y := by
simp only [lt_iff_le_not_le, hf.le_iff h]
1
2.718282
0
0.4
5
395
import Mathlib.Analysis.NormedSpace.PiLp import Mathlib.Analysis.InnerProductSpace.PiL2 #align_import analysis.matrix from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open scoped NNReal Matrix namespace Matrix variable {R l m n α β : Type*} [Fintype l] [Fintyp...
Mathlib/Analysis/Matrix.lean
102
104
theorem nnnorm_lt_iff {r : ℝ≥0} (hr : 0 < r) {A : Matrix m n α} : ‖A‖₊ < r ↔ ∀ i j, ‖A i j‖₊ < r := by
simp_rw [nnnorm_def, pi_nnnorm_lt_iff hr]
1
2.718282
0
0.533333
15
509
import Mathlib.Data.Finsupp.Encodable import Mathlib.LinearAlgebra.Pi import Mathlib.LinearAlgebra.Span import Mathlib.Data.Set.Countable #align_import linear_algebra.finsupp from "leanprover-community/mathlib"@"9d684a893c52e1d6692a504a118bfccbae04feeb" noncomputable section open Set LinearMap Submodule namespa...
Mathlib/LinearAlgebra/Finsupp.lean
287
289
theorem span_single_image (s : Set M) (a : α) : Submodule.span R (single a '' s) = (Submodule.span R s).map (lsingle a : M →ₗ[R] α →₀ M) := by
rw [← span_image]; rfl
1
2.718282
0
1
9
1,040
import Mathlib.SetTheory.Game.Ordinal import Mathlib.SetTheory.Ordinal.NaturalOps #align_import set_theory.game.birthday from "leanprover-community/mathlib"@"a347076985674932c0e91da09b9961ed0a79508c" universe u open Ordinal namespace SetTheory open scoped NaturalOps PGame namespace PGame noncomputable def b...
Mathlib/SetTheory/Game/Birthday.lean
111
111
theorem birthday_star : birthday star = 1 := by
rw [birthday_def]; simp
1
2.718282
0
0.4
10
387
import Mathlib.Analysis.Convex.Topology import Mathlib.Analysis.NormedSpace.Pointwise import Mathlib.Analysis.Seminorm import Mathlib.Analysis.LocallyConvex.Bounded import Mathlib.Analysis.RCLike.Basic #align_import analysis.convex.gauge from "leanprover-community/mathlib"@"373b03b5b9d0486534edbe94747f23cb3712f93d" ...
Mathlib/Analysis/Convex/Gauge.lean
134
135
theorem gauge_neg_set_neg (x : E) : gauge (-s) (-x) = gauge s x := by
simp_rw [gauge_def', smul_neg, neg_mem_neg]
1
2.718282
0
1.090909
11
1,185
import Mathlib.GroupTheory.Coxeter.Length import Mathlib.Data.ZMod.Parity namespace CoxeterSystem open List Matrix Function variable {B : Type*} variable {W : Type*} [Group W] variable {M : CoxeterMatrix B} (cs : CoxeterSystem M W) local prefix:100 "s" => cs.simple local prefix:100 "π" => cs.wordProd local prefi...
Mathlib/GroupTheory/Coxeter/Inversion.lean
80
80
theorem isReflection_inv : cs.IsReflection t⁻¹ := by
rwa [ht.inv]
1
2.718282
0
1.111111
9
1,198
import Mathlib.Analysis.SpecialFunctions.ImproperIntegrals import Mathlib.Analysis.Calculus.ParametricIntegral import Mathlib.MeasureTheory.Measure.Haar.NormedSpace #align_import analysis.mellin_transform from "leanprover-community/mathlib"@"917c3c072e487b3cccdbfeff17e75b40e45f66cb" open MeasureTheory Set Filter A...
Mathlib/Analysis/MellinTransform.lean
47
50
theorem MellinConvergent.const_smul {f : ℝ → E} {s : ℂ} (hf : MellinConvergent f s) {𝕜 : Type*} [NontriviallyNormedField 𝕜] [NormedSpace 𝕜 E] [SMulCommClass ℂ 𝕜 E] (c : 𝕜) : MellinConvergent (fun t => c • f t) s := by
simpa only [MellinConvergent, smul_comm] using hf.smul c
1
2.718282
0
1.333333
12
1,415
import Mathlib.Algebra.GradedMonoid import Mathlib.Algebra.Order.Monoid.Canonical.Defs import Mathlib.Algebra.MvPolynomial.Basic #align_import ring_theory.mv_polynomial.weighted_homogeneous from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section open Set Function Fins...
Mathlib/RingTheory/MvPolynomial/WeightedHomogeneous.lean
89
91
theorem weightedTotalDegree'_zero (w : σ → M) : weightedTotalDegree' w (0 : MvPolynomial σ R) = ⊥ := by
simp only [weightedTotalDegree', support_zero, Finset.sup_empty]
1
2.718282
0
1.125
8
1,208
import Mathlib.Algebra.Group.Equiv.Basic import Mathlib.Algebra.Group.Aut import Mathlib.Data.ZMod.Defs import Mathlib.Tactic.Ring #align_import algebra.quandle from "leanprover-community/mathlib"@"28aa996fc6fb4317f0083c4e6daf79878d81be33" open MulOpposite universe u v class Shelf (α : Type u) where act : ...
Mathlib/Algebra/Quandle.lean
283
283
theorem self_act_act_eq {x y : R} : (x ◃ x) ◃ y = x ◃ y := by
rw [← right_inv x y, ← self_distrib]
1
2.718282
0
1.285714
7
1,357
import Mathlib.MeasureTheory.Decomposition.SignedHahn import Mathlib.MeasureTheory.Measure.MutuallySingular #align_import measure_theory.decomposition.jordan from "leanprover-community/mathlib"@"70a4f2197832bceab57d7f41379b2592d1110570" noncomputable section open scoped Classical MeasureTheory ENNReal NNReal va...
Mathlib/MeasureTheory/Decomposition/Jordan.lean
158
160
theorem real_smul_posPart_neg (r : ℝ) (hr : r < 0) : (r • j).posPart = (-r).toNNReal • j.negPart := by
rw [real_smul_def, ← smul_negPart, if_neg (not_le.2 hr), neg_posPart]
1
2.718282
0
0.333333
6
360
import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Algebra.Order.Group.Int import Mathlib.Algebra.Order.Ring.Nat import Mathlib.Algebra.Ring.Rat import Mathlib.Data.PNat.Defs #align_import data.rat.lemmas from "leanprover-community/mathlib"@"550b58538991c8977703fdeb7c9d51a5aa27df11" namespace Rat o...
Mathlib/Data/Rat/Lemmas.lean
98
101
theorem mul_den (q₁ q₂ : ℚ) : (q₁ * q₂).den = q₁.den * q₂.den / Nat.gcd (q₁.num * q₂.num).natAbs (q₁.den * q₂.den) := by
rw [mul_def, normalize_eq]
1
2.718282
0
1.333333
12
1,389
import Mathlib.Order.Filter.Cofinite import Mathlib.Order.ZornAtoms #align_import order.filter.ultrafilter from "leanprover-community/mathlib"@"8631e2d5ea77f6c13054d9151d82b83069680cb1" universe u v variable {α : Type u} {β : Type v} {γ : Type*} open Set Filter Function open scoped Classical open Filter inst...
Mathlib/Order/Filter/Ultrafilter.lean
135
135
theorem compl_mem_iff_not_mem : sᶜ ∈ f ↔ s ∉ f := by
rw [← compl_not_mem_iff, compl_compl]
1
2.718282
0
0
2
56
import Mathlib.Algebra.Ring.Defs import Mathlib.Algebra.Group.Ext local macro:max "local_hAdd[" type:term ", " inst:term "]" : term => `(term| (letI := $inst; HAdd.hAdd : $type → $type → $type)) local macro:max "local_hMul[" type:term ", " inst:term "]" : term => `(term| (letI := $inst; HMul.hMul : $type → $typ...
Mathlib/Algebra/Ring/Ext.lean
519
520
theorem toRing_injective : Function.Injective (@toRing R) := by
rintro ⟨⟩ ⟨⟩ _; congr
1
2.718282
0
0.4
10
397
import Mathlib.Topology.Algebra.Module.WeakDual import Mathlib.Analysis.Normed.Field.Basic import Mathlib.Analysis.LocallyConvex.WithSeminorms #align_import analysis.locally_convex.weak_dual from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" variable {𝕜 E F ι : Type*} open Topology ...
Mathlib/Analysis/LocallyConvex/WeakDual.lean
68
70
theorem toSeminorm_ball_zero {f : E →ₗ[𝕜] 𝕜} {r : ℝ} : Seminorm.ball f.toSeminorm 0 r = { x : E | ‖f x‖ < r } := by
simp only [Seminorm.ball_zero_eq, toSeminorm_apply]
1
2.718282
0
0.5
2
443
import Mathlib.Algebra.MvPolynomial.Derivation import Mathlib.Algebra.MvPolynomial.Variables #align_import data.mv_polynomial.pderiv from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section universe u v namespace MvPolynomial open Set Function Finsupp variable {R : ...
Mathlib/Algebra/MvPolynomial/PDeriv.lean
89
91
theorem pderiv_X [DecidableEq σ] (i j : σ) : pderiv i (X j : MvPolynomial σ R) = Pi.single (f := fun j => _) i 1 j := by
rw [pderiv_def, mkDerivation_X]
1
2.718282
0
0.222222
9
283
import Mathlib.Algebra.Polynomial.Degree.Definitions import Mathlib.Algebra.Polynomial.Induction #align_import data.polynomial.eval from "leanprover-community/mathlib"@"728baa2f54e6062c5879a3e397ac6bac323e506f" set_option linter.uppercaseLean3 false noncomputable section open Finset AddMonoidAlgebra open Polyn...
Mathlib/Algebra/Polynomial/Eval.lean
77
78
theorem eval₂_monomial {n : ℕ} {r : R} : (monomial n r).eval₂ f x = f r * x ^ n := by
simp [eval₂_eq_sum]
1
2.718282
0
0.6
15
534
import Mathlib.Dynamics.BirkhoffSum.Basic import Mathlib.Algebra.Module.Basic open Finset section birkhoffAverage variable (R : Type*) {α M : Type*} [DivisionSemiring R] [AddCommMonoid M] [Module R M] def birkhoffAverage (f : α → α) (g : α → M) (n : ℕ) (x : α) : M := (n : R)⁻¹ • birkhoffSum f g n x theorem bir...
Mathlib/Dynamics/BirkhoffSum/Average.lean
68
70
theorem birkhoffAverage_congr_ring' (S : Type*) [DivisionSemiring S] [Module S M] : birkhoffAverage (α := α) (M := M) R = birkhoffAverage S := by
ext; apply birkhoffAverage_congr_ring
1
2.718282
0
0.2
5
276
import Mathlib.Data.Set.Basic #align_import order.well_founded from "leanprover-community/mathlib"@"2c84c2c5496117349007d97104e7bbb471381592" variable {α β γ : Type*} namespace WellFounded variable {r r' : α → α → Prop} #align well_founded_relation.r WellFoundedRelation.rel protected theorem isAsymm (h : Well...
Mathlib/Order/WellFounded.lean
82
89
theorem wellFounded_iff_has_min {r : α → α → Prop} : WellFounded r ↔ ∀ s : Set α, s.Nonempty → ∃ m ∈ s, ∀ x ∈ s, ¬r x m := by
refine ⟨fun h => h.has_min, fun h => ⟨fun x => ?_⟩⟩ by_contra hx obtain ⟨m, hm, hm'⟩ := h {x | ¬Acc r x} ⟨x, hx⟩ refine hm ⟨_, fun y hy => ?_⟩ by_contra hy' exact hm' y hy' hy
6
403.428793
2
2
1
2,400
import Mathlib.Data.Multiset.Basic #align_import data.multiset.range from "leanprover-community/mathlib"@"0a0ec35061ed9960bf0e7ffb0335f44447b58977" open List Nat namespace Multiset -- range def range (n : ℕ) : Multiset ℕ := List.range n #align multiset.range Multiset.range theorem coe_range (n : ℕ) : ↑(List...
Mathlib/Data/Multiset/Range.lean
73
75
theorem range_add_eq_union (a b : ℕ) : range (a + b) = range a ∪ (range b).map (a + ·) := by
rw [range_add, add_eq_union_iff_disjoint] apply range_disjoint_map_add
2
7.389056
1
1
3
851
import Mathlib.CategoryTheory.Adjunction.Unique import Mathlib.CategoryTheory.Adjunction.FullyFaithful import Mathlib.CategoryTheory.Sites.Sheaf import Mathlib.CategoryTheory.Limits.Preserves.Finite universe v₁ v₂ u₁ u₂ namespace CategoryTheory open Limits variable {C : Type u₁} [Category.{v₁} C] (J : Grothendiec...
Mathlib/CategoryTheory/Sites/Sheafification.lean
96
97
theorem sheafifyMap_id (P : Cᵒᵖ ⥤ D) : sheafifyMap J (𝟙 P) = 𝟙 (sheafify J P) := by
simp [sheafifyMap, sheafify]
1
2.718282
0
0.666667
3
614
import Mathlib.MeasureTheory.Function.LpSeminorm.Basic import Mathlib.MeasureTheory.Integral.MeanInequalities #align_import measure_theory.function.lp_seminorm from "leanprover-community/mathlib"@"c4015acc0a223449d44061e27ddac1835a3852b9" open Filter open scoped ENNReal Topology namespace MeasureTheory variable ...
Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean
26
33
theorem snorm'_add_le {f g : α → E} (hf : AEStronglyMeasurable f μ) (hg : AEStronglyMeasurable g μ) (hq1 : 1 ≤ q) : snorm' (f + g) q μ ≤ snorm' f q μ + snorm' g q μ := calc (∫⁻ a, (‖(f + g) a‖₊ : ℝ≥0∞) ^ q ∂μ) ^ (1 / q) ≤ (∫⁻ a, ((fun a => (‖f a‖₊ : ℝ≥0∞)) + fun a => (‖g a‖₊ : ℝ≥0∞)) a ^ q ∂μ) ^ (1 / ...
gcongr with a simp only [Pi.add_apply, ← ENNReal.coe_add, ENNReal.coe_le_coe, nnnorm_add_le] _ ≤ snorm' f q μ + snorm' g q μ := ENNReal.lintegral_Lp_add_le hf.ennnorm hg.ennnorm hq1
3
20.085537
1
1.5
8
1,656
import Mathlib.Analysis.NormedSpace.HahnBanach.Extension import Mathlib.Analysis.NormedSpace.RCLike import Mathlib.Analysis.LocallyConvex.Polar #align_import analysis.normed_space.dual from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section open scoped Classical open ...
Mathlib/Analysis/NormedSpace/Dual.lean
87
88
theorem double_dual_bound (x : E) : ‖(inclusionInDoubleDual 𝕜 E) x‖ ≤ ‖x‖ := by
simpa using ContinuousLinearMap.le_of_opNorm_le _ (inclusionInDoubleDual_norm_le 𝕜 E) x
1
2.718282
0
0.666667
3
610
import Mathlib.Algebra.Group.Commute.Basic import Mathlib.GroupTheory.GroupAction.Basic import Mathlib.Dynamics.PeriodicPts import Mathlib.Data.Set.Pointwise.SMul namespace MulAction open Pointwise variable {α : Type*} variable {G : Type*} [Group G] [MulAction G α] variable {M : Type*} [Monoid M] [MulAction M α] ...
Mathlib/GroupTheory/GroupAction/FixedPoints.lean
124
126
theorem set_mem_fixedBy_iff (s : Set α) (g : G) : s ∈ fixedBy (Set α) g ↔ ∀ x, g • x ∈ s ↔ x ∈ s := by
simp_rw [mem_fixedBy, ← eq_inv_smul_iff, Set.ext_iff, Set.mem_inv_smul_set_iff, Iff.comm]
1
2.718282
0
0.888889
9
774
import Mathlib.CategoryTheory.CofilteredSystem import Mathlib.Combinatorics.SimpleGraph.Subgraph #align_import combinatorics.simple_graph.finsubgraph from "leanprover-community/mathlib"@"c6ef6387ede9983aee397d442974e61f89dfd87b" open Set CategoryTheory universe u v variable {V : Type u} {W : Type v} {G : Simple...
Mathlib/Combinatorics/SimpleGraph/Finsubgraph.lean
93
95
theorem singletonFinsubgraph_le_adj_left {u v : V} {e : G.Adj u v} : singletonFinsubgraph u ≤ finsubgraphOfAdj e := by
simp [singletonFinsubgraph, finsubgraphOfAdj]
1
2.718282
0
0.666667
3
609
import Mathlib.Order.RelIso.Basic import Mathlib.Logic.Embedding.Set import Mathlib.Logic.Equiv.Set #align_import order.rel_iso.set from "leanprover-community/mathlib"@"ee0c179cd3c8a45aa5bffbf1b41d8dbede452865" open Function universe u v w variable {α β γ δ : Type*} {r : α → α → Prop} {s : β → β → Prop} {t : γ ...
Mathlib/Order/RelIso/Set.lean
111
112
theorem RelIso.preimage_eq_image_symm (e : r ≃r s) (t : Set β) : e ⁻¹' t = e.symm '' t := by
rw [e.symm.image_eq_preimage_symm]; rfl
1
2.718282
0
0
1
13
import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Algebra.Order.Ring.Int import Mathlib.Algebra.Ring.Divisibility.Basic import Mathlib.Data.Nat.Cast.Order #align_import algebra.order.ring.abs from "leanprover-community/mathlib"@"10b4e499f43088dd3bb7b5796184ad5216648ab1" #align_import data.nat.parity from "leanpr...
Mathlib/Algebra/Order/Ring/Abs.lean
201
202
theorem dvd_abs (a b : α) : a ∣ |b| ↔ a ∣ b := by
cases' abs_choice b with h h <;> simp only [h, dvd_neg]
1
2.718282
0
0
2
141
import Mathlib.Analysis.Complex.UpperHalfPlane.Topology import Mathlib.Analysis.SpecialFunctions.Arsinh import Mathlib.Geometry.Euclidean.Inversion.Basic #align_import analysis.complex.upper_half_plane.metric from "leanprover-community/mathlib"@"caa58cbf5bfb7f81ccbaca4e8b8ac4bc2b39cc1c" noncomputable section ope...
Mathlib/Analysis/Complex/UpperHalfPlane/Metric.lean
45
47
theorem sinh_half_dist (z w : ℍ) : sinh (dist z w / 2) = dist (z : ℂ) w / (2 * √(z.im * w.im)) := by
rw [dist_eq, mul_div_cancel_left₀ (arsinh _) two_ne_zero, sinh_arsinh]
1
2.718282
0
0.777778
9
689
import Mathlib.Data.Finset.Lattice #align_import combinatorics.set_family.compression.down from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" variable {α : Type*} [DecidableEq α] {𝒜 ℬ : Finset (Finset α)} {s : Finset α} {a : α} namespace Finset def nonMemberSubfamily (a : α) (𝒜 : ...
Mathlib/Combinatorics/SetFamily/Compression/Down.lean
86
88
theorem memberSubfamily_union (a : α) (𝒜 ℬ : Finset (Finset α)) : (𝒜 ∪ ℬ).memberSubfamily a = 𝒜.memberSubfamily a ∪ ℬ.memberSubfamily a := by
simp_rw [memberSubfamily, filter_union, image_union]
1
2.718282
0
1.3125
16
1,367
import Mathlib.Topology.Separation import Mathlib.Algebra.BigOperators.Finprod #align_import topology.algebra.infinite_sum.basic from "leanprover-community/mathlib"@"3b52265189f3fb43aa631edffce5d060fafaf82f" noncomputable section open Filter Function open scoped Topology variable {α β γ : Type*} section HasP...
Mathlib/Topology/Algebra/InfiniteSum/Defs.lean
174
175
theorem HasProd.unique {a₁ a₂ : α} [T2Space α] : HasProd f a₁ → HasProd f a₂ → a₁ = a₂ := by
classical exact tendsto_nhds_unique
1
2.718282
0
0.5
4
493
import Mathlib.Data.Set.Lattice import Mathlib.Init.Set import Mathlib.Control.Basic import Mathlib.Lean.Expr.ExtraRecognizers #align_import data.set.functor from "leanprover-community/mathlib"@"207cfac9fcd06138865b5d04f7091e46d9320432" universe u open Function namespace Set variable {α β : Type u} {s : Set α} ...
Mathlib/Data/Set/Functor.lean
155
156
theorem image_image_val_eq_restrict_image {δ : Type*} {f : α → δ} : f '' γ = β.restrict f '' γ := by
ext; simp
1
2.718282
0
0.285714
7
312
import Mathlib.Topology.Algebra.UniformConvergence #align_import topology.algebra.module.strong_topology from "leanprover-community/mathlib"@"8905e5ed90859939681a725b00f6063e65096d95" open scoped Topology UniformConvergence section General variable {𝕜₁ 𝕜₂ : Type*} [NormedField 𝕜₁] [NormedField 𝕜₂] (σ : 𝕜...
Mathlib/Topology/Algebra/Module/StrongTopology.lean
113
115
theorem uniformSpace_eq [UniformSpace F] [UniformAddGroup F] (𝔖 : Set (Set E)) : instUniformSpace σ F 𝔖 = UniformSpace.comap DFunLike.coe (UniformOnFun.uniformSpace E F 𝔖) := by
rw [instUniformSpace, UniformSpace.replaceTopology_eq]
1
2.718282
0
1
3
861
import Batteries.Tactic.SeqFocus namespace Ordering @[simp] theorem swap_swap {o : Ordering} : o.swap.swap = o := by cases o <;> rfl @[simp] theorem swap_inj {o₁ o₂ : Ordering} : o₁.swap = o₂.swap ↔ o₁ = o₂ := ⟨fun h => by simpa using congrArg swap h, congrArg _⟩ theorem swap_then (o₁ o₂ : Ordering) : (o₁.then...
.lake/packages/batteries/Batteries/Classes/Order.lean
26
27
theorem then_eq_gt {o₁ o₂ : Ordering} : o₁.then o₂ = gt ↔ o₁ = gt ∨ o₁ = eq ∧ o₂ = gt := by
cases o₁ <;> cases o₂ <;> decide
1
2.718282
0
0
5
214
import Mathlib.Algebra.Order.Monoid.Defs import Mathlib.Algebra.Order.Sub.Defs import Mathlib.Util.AssertExists #align_import algebra.order.group.defs from "leanprover-community/mathlib"@"b599f4e4e5cf1fbcb4194503671d3d9e569c1fce" open Function universe u variable {α : Type u} class OrderedAddCommGroup (α : Ty...
Mathlib/Algebra/Order/Group/Defs.lean
71
73
theorem OrderedCommGroup.to_contravariantClass_left_le (α : Type u) [OrderedCommGroup α] : ContravariantClass α α (· * ·) (· ≤ ·) where elim a b c bc := by
simpa using mul_le_mul_left' bc a⁻¹
1
2.718282
0
0.4
25
400
import Mathlib.Geometry.RingedSpace.PresheafedSpace import Mathlib.CategoryTheory.Limits.Final import Mathlib.Topology.Sheaves.Stalks #align_import algebraic_geometry.stalks from "leanprover-community/mathlib"@"d39590fc8728fbf6743249802486f8c91ffe07bc" noncomputable section universe v u v' u' open Opposite Cate...
Mathlib/Geometry/RingedSpace/Stalks.lean
56
59
theorem stalkMap_germ {X Y : PresheafedSpace.{_, _, v} C} (α : X ⟶ Y) (U : Opens Y) (x : (Opens.map α.base).obj U) : Y.presheaf.germ ⟨α.base x.1, x.2⟩ ≫ stalkMap α ↑x = α.c.app (op U) ≫ X.presheaf.germ x := by
rw [stalkMap, stalkFunctor_map_germ_assoc, stalkPushforward_germ]
1
2.718282
0
0.875
8
765
import Mathlib.Algebra.GroupWithZero.Units.Lemmas import Mathlib.Algebra.Order.BigOperators.Group.Finset import Mathlib.Data.Fintype.BigOperators #align_import data.sign from "leanprover-community/mathlib"@"2445c98ae4b87eabebdde552593519b9b6dc350c" -- Porting note (#11081): cannot automatically derive Fintype, adde...
Mathlib/Data/Sign.lean
165
165
theorem nonneg_iff_ne_neg_one {a : SignType} : 0 ≤ a ↔ a ≠ -1 := by
cases a <;> decide
1
2.718282
0
0
6
104
import Mathlib.Algebra.Order.Group.OrderIso import Mathlib.Algebra.Order.Monoid.OrderDual import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Order.Bounds.OrderIso import Mathlib.Order.ConditionallyCompleteLattice.Basic #align_import algebra.bounds from "leanprover-community/mathlib"@"dd71334db81d0bd444af1ee339a29...
Mathlib/Algebra/Bounds.lean
175
176
theorem ciSup_div (hf : BddAbove (range f)) (a : G) : (⨆ i, f i) / a = ⨆ i, f i / a := by
simp only [div_eq_mul_inv, ciSup_mul hf]
1
2.718282
0
0
2
199
import Mathlib.Algebra.Group.Support import Mathlib.Algebra.Order.Monoid.WithTop import Mathlib.Data.Nat.Cast.Field #align_import algebra.char_zero.lemmas from "leanprover-community/mathlib"@"acee671f47b8e7972a1eb6f4eed74b4b3abce829" open Function Set section AddMonoidWithOne variable {α M : Type*} [AddMonoidWith...
Mathlib/Algebra/CharZero/Lemmas.lean
132
133
theorem nat_mul_inj' {n : ℕ} {a b : R} (h : (n : R) * a = (n : R) * b) (w : n ≠ 0) : a = b := by
simpa [w] using nat_mul_inj h
1
2.718282
0
0.5
12
426
import Mathlib.Algebra.Order.Field.Basic import Mathlib.Combinatorics.SimpleGraph.Basic import Mathlib.Data.Rat.Cast.Order import Mathlib.Order.Partition.Finpartition import Mathlib.Tactic.GCongr import Mathlib.Tactic.NormNum import Mathlib.Tactic.Positivity import Mathlib.Tactic.Ring #align_import combinatorics.simp...
Mathlib/Combinatorics/SimpleGraph/Density.lean
66
67
theorem interedges_empty_left (t : Finset β) : interedges r ∅ t = ∅ := by
rw [interedges, Finset.empty_product, filter_empty]
1
2.718282
0
0.785714
14
695
import Mathlib.Data.List.Basic #align_import data.list.join from "leanprover-community/mathlib"@"18a5306c091183ac90884daa9373fa3b178e8607" -- Make sure we don't import algebra assert_not_exists Monoid variable {α β : Type*} namespace List attribute [simp] join -- Porting note (#10618): simp can prove this -- @...
Mathlib/Data/List/Join.lean
60
62
theorem join_filter_ne_nil [DecidablePred fun l : List α => l ≠ []] {L : List (List α)} : join (L.filter fun l => l ≠ []) = L.join := by
simp [join_filter_not_isEmpty, ← isEmpty_iff_eq_nil]
1
2.718282
0
0.9
10
782
import Mathlib.RingTheory.Localization.FractionRing import Mathlib.Algebra.Polynomial.RingDivision #align_import field_theory.ratfunc from "leanprover-community/mathlib"@"bf9bbbcf0c1c1ead18280b0d010e417b10abb1b6" noncomputable section open scoped Classical open scoped nonZeroDivisors Polynomial universe u v va...
Mathlib/FieldTheory/RatFunc/Defs.lean
154
155
theorem mk_eq_div' (p q : K[X]) : RatFunc.mk p q = ofFractionRing (algebraMap _ _ p / algebraMap _ _ q) := by
rw [RatFunc.mk]
1
2.718282
0
0.625
8
542
import Mathlib.Algebra.Polynomial.Expand import Mathlib.Algebra.Polynomial.Splits import Mathlib.Algebra.Squarefree.Basic import Mathlib.FieldTheory.Minpoly.Field import Mathlib.RingTheory.PowerBasis #align_import field_theory.separable from "leanprover-community/mathlib"@"92ca63f0fb391a9ca5f22d2409a6080e786d99f7" ...
Mathlib/FieldTheory/Separable.lean
82
83
theorem separable_C (r : R) : (C r).Separable ↔ IsUnit r := by
rw [separable_def, derivative_C, isCoprime_zero_right, isUnit_C]
1
2.718282
0
0.9
10
781
import Mathlib.Algebra.Polynomial.Degree.Definitions import Mathlib.Algebra.Polynomial.Eval import Mathlib.Algebra.Polynomial.Monic import Mathlib.Algebra.Polynomial.RingDivision import Mathlib.Tactic.Abel #align_import ring_theory.polynomial.pochhammer from "leanprover-community/mathlib"@"53b216bcc1146df1c4a0a868778...
Mathlib/RingTheory/Polynomial/Pochhammer.lean
120
121
theorem ascPochhammer_ne_zero_eval_zero {n : ℕ} (h : n ≠ 0) : (ascPochhammer S n).eval 0 = 0 := by
simp [ascPochhammer_eval_zero, h]
1
2.718282
0
0.96
25
796
import Mathlib.Algebra.Module.BigOperators import Mathlib.Data.Fintype.Perm import Mathlib.GroupTheory.Perm.Finite import Mathlib.GroupTheory.Perm.List #align_import group_theory.perm.cycle.basic from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" open Equiv Function Finset variable {...
Mathlib/GroupTheory/Perm/Cycle/Basic.lean
90
90
theorem sameCycle_one : SameCycle 1 x y ↔ x = y := by
simp [SameCycle]
1
2.718282
0
0
7
112
import Mathlib.MeasureTheory.Integral.IntervalIntegral import Mathlib.MeasureTheory.Integral.Average #align_import measure_theory.integral.interval_average from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" open MeasureTheory Set TopologicalSpace open scoped Interval variable {E : Ty...
Mathlib/MeasureTheory/Integral/IntervalAverage.lean
39
40
theorem interval_average_symm (f : ℝ → E) (a b : ℝ) : (⨍ x in a..b, f x) = ⨍ x in b..a, f x := by
rw [setAverage_eq, setAverage_eq, uIoc_comm]
1
2.718282
0
0.666667
3
621
import Mathlib.NumberTheory.NumberField.Embeddings #align_import number_theory.number_field.units from "leanprover-community/mathlib"@"00f91228655eecdcd3ac97a7fd8dbcb139fe990a" open scoped NumberField noncomputable section open NumberField Units variable (K : Type*) [Field K] namespace NumberField.Units secti...
Mathlib/NumberTheory/NumberField/Units/Basic.lean
78
79
theorem coe_pow (x : (𝓞 K)ˣ) (n : ℕ) : ((x ^ n : (𝓞 K)ˣ) : K) = (x : K) ^ n := by
rw [← map_pow, ← val_pow_eq_pow_val]
1
2.718282
0
0.666667
3
573