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import Mathlib.Data.Complex.Basic import Mathlib.MeasureTheory.Integral.CircleIntegral #align_import measure_theory.integral.circle_transform from "leanprover-community/mathlib"@"d11893b411025250c8e61ff2f12ccbd7ee35ab15" open Set MeasureTheory Metric Filter Function open scoped Interval Real noncomputable secti...
Mathlib/MeasureTheory/Integral/CircleTransform.lean
120
129
theorem abs_circleTransformBoundingFunction_le {R r : ℝ} (hr : r < R) (hr' : 0 ≤ r) (z : ℂ) : ∃ x : closedBall z r ×ˢ [[0, 2 * π]], ∀ y : closedBall z r ×ˢ [[0, 2 * π]], abs (circleTransformBoundingFunction R z y) ≤ abs (circleTransformBoundingFunction R z x) := by
have cts := continuousOn_abs_circleTransformBoundingFunction hr z have comp : IsCompact (closedBall z r ×ˢ [[0, 2 * π]]) := by apply_rules [IsCompact.prod, ProperSpace.isCompact_closedBall z r, isCompact_uIcc] have none : (closedBall z r ×ˢ [[0, 2 * π]]).Nonempty := (nonempty_closedBall.2 hr').prod nonem...
import Mathlib.Analysis.InnerProductSpace.Dual import Mathlib.Analysis.Calculus.FDeriv.Basic import Mathlib.Analysis.Calculus.Deriv.Basic open Topology InnerProductSpace Set noncomputable section variable {𝕜 F : Type*} [RCLike 𝕜] variable [NormedAddCommGroup F] [InnerProductSpace 𝕜 F] [CompleteSpace F] variabl...
Mathlib/Analysis/Calculus/Gradient/Basic.lean
138
140
theorem hasGradientWithinAt_univ : HasGradientWithinAt f f' univ x ↔ HasGradientAt f f' x := by
rw [hasGradientWithinAt_iff_hasFDerivWithinAt, hasGradientAt_iff_hasFDerivAt] exact hasFDerivWithinAt_univ
import Mathlib.Algebra.Module.Equiv import Mathlib.Algebra.Module.Hom import Mathlib.Algebra.Module.Prod import Mathlib.Algebra.Module.Submodule.Range import Mathlib.Data.Set.Finite import Mathlib.Order.ConditionallyCompleteLattice.Basic import Mathlib.Tactic.Abel #align_import linear_algebra.basic from "leanprover-c...
Mathlib/LinearAlgebra/Basic.lean
83
91
theorem isLinearMap_sub {R M : Type*} [Semiring R] [AddCommGroup M] [Module R M] : IsLinearMap R fun x : M × M => x.1 - x.2 := by
apply IsLinearMap.mk · intro x y -- porting note (#10745): was `simp [add_comm, add_left_comm, sub_eq_add_neg]` rw [Prod.fst_add, Prod.snd_add] abel · intro x y simp [smul_sub]
import Mathlib.Algebra.Polynomial.Reverse import Mathlib.Algebra.Regular.SMul #align_import data.polynomial.monic from "leanprover-community/mathlib"@"cbdf7b565832144d024caa5a550117c6df0204a5" noncomputable section open Finset open Polynomial namespace Polynomial universe u v y variable {R : Type u} {S : Typ...
Mathlib/Algebra/Polynomial/Monic.lean
360
363
theorem nextCoeff_map (p : R[X]) : (p.map f).nextCoeff = f p.nextCoeff := by
unfold nextCoeff rw [natDegree_map_eq_of_injective hf] split_ifs <;> simp [*]
import Mathlib.CategoryTheory.Limits.Types import Mathlib.CategoryTheory.Limits.Shapes.Products import Mathlib.CategoryTheory.Limits.Shapes.BinaryProducts import Mathlib.CategoryTheory.Limits.Shapes.Terminal import Mathlib.CategoryTheory.ConcreteCategory.Basic import Mathlib.Tactic.CategoryTheory.Elementwise import Ma...
Mathlib/CategoryTheory/Limits/Shapes/Types.lean
727
729
theorem pullbackIsoPullback_inv_snd_apply (x : (Types.pullbackCone f g).pt) : (pullback.snd : _ ⟶ Y) ((pullbackIsoPullback f g).inv x) = (fun p => (p.1 : X × Y).snd) x := by
rw [elementwise_of% pullbackIsoPullback_inv_snd]
import Mathlib.Geometry.RingedSpace.PresheafedSpace import Mathlib.Topology.Category.TopCat.Limits.Basic import Mathlib.Topology.Sheaves.Limits import Mathlib.CategoryTheory.ConcreteCategory.Elementwise #align_import algebraic_geometry.presheafed_space.has_colimits from "leanprover-community/mathlib"@"178a32653e369dc...
Mathlib/Geometry/RingedSpace/PresheafedSpace/HasColimits.lean
266
286
theorem desc_c_naturality (F : J ⥤ PresheafedSpace.{_, _, v} C) (s : Cocone F) {U V : (Opens s.pt.carrier)ᵒᵖ} (i : U ⟶ V) : s.pt.presheaf.map i ≫ descCApp F s V = descCApp F s U ≫ (colimit.desc (F ⋙ forget C) ((forget C).mapCocone s) _* (colimitCocone F).pt.presheaf).map i := by
dsimp [descCApp] refine limit_obj_ext (fun j => ?_) simp only [limit.lift_π, NatTrans.naturality, limit.lift_π_assoc, eqToHom_map, assoc, pushforwardObj_map, NatTrans.naturality_assoc, op_map, limitObjIsoLimitCompEvaluation_inv_π_app_assoc, limitObjIsoLimitCompEvaluation_inv_π_app] dsimp have w :...
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
184
189
theorem eval₂_mul_noncomm (hf : ∀ k, Commute (f <| q.coeff k) x) : eval₂ f x (p * q) = eval₂ f x p * eval₂ f x q := by
rcases p with ⟨p⟩; rcases q with ⟨q⟩ simp only [coeff] at hf simp only [← ofFinsupp_mul, eval₂_ofFinsupp] exact liftNC_mul _ _ p q fun {k n} _hn => (hf k).pow_right n
import Mathlib.Algebra.Field.ULift import Mathlib.Algebra.MvPolynomial.Cardinal import Mathlib.Data.Nat.Factorization.PrimePow import Mathlib.Data.Rat.Denumerable import Mathlib.FieldTheory.Finite.GaloisField import Mathlib.Logic.Equiv.TransferInstance import Mathlib.RingTheory.Localization.Cardinality import Mathlib....
Mathlib/FieldTheory/Cardinality.lean
53
57
theorem Fintype.nonempty_field_iff {α} [Fintype α] : Nonempty (Field α) ↔ IsPrimePow ‖α‖ := by
refine ⟨fun ⟨h⟩ => Fintype.isPrimePow_card_of_field, ?_⟩ rintro ⟨p, n, hp, hn, hα⟩ haveI := Fact.mk hp.nat_prime exact ⟨(Fintype.equivOfCardEq ((GaloisField.card p n hn.ne').trans hα)).symm.field⟩
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Reverse import Mathlib.Algebra.Polynomial.Inductions import Mathlib.RingTheory.Localization.Basic #align_import data.polynomial.laurent from "leanprover-community/mathlib"@"831c494092374cfe9f50591ed0ac81a25efc5b86" open Polynomial Func...
Mathlib/Algebra/Polynomial/Laurent.lean
531
533
theorem degree_T [Nontrivial R] (n : ℤ) : (T n : R[T;T⁻¹]).degree = n := by
rw [← one_mul (T n), ← map_one C] exact degree_C_mul_T n 1 (one_ne_zero : (1 : R) ≠ 0)
import Mathlib.Topology.ContinuousOn import Mathlib.Data.Set.BoolIndicator open Set Filter Topology TopologicalSpace Classical universe u v variable {X : Type u} {Y : Type v} {ι : Type*} variable [TopologicalSpace X] [TopologicalSpace Y] {s t : Set X} section Clopen protected theorem IsClopen.isOpen (hs : IsClo...
Mathlib/Topology/Clopen.lean
30
34
theorem isClopen_iff_frontier_eq_empty : IsClopen s ↔ frontier s = ∅ := by
rw [IsClopen, ← closure_eq_iff_isClosed, ← interior_eq_iff_isOpen, frontier, diff_eq_empty] refine ⟨fun h => (h.1.trans h.2.symm).subset, fun h => ?_⟩ exact ⟨(h.trans interior_subset).antisymm subset_closure, interior_subset.antisymm (subset_closure.trans h)⟩
import Mathlib.Data.List.Forall2 import Mathlib.Data.Set.Pairwise.Basic import Mathlib.Init.Data.Fin.Basic #align_import data.list.nodup from "leanprover-community/mathlib"@"c227d107bbada5d0d9d20287e3282c0a7f1651a0" universe u v open Nat Function variable {α : Type u} {β : Type v} {l l₁ l₂ : List α} {r : α → α ...
Mathlib/Data/List/Nodup.lean
206
208
theorem nodup_append {l₁ l₂ : List α} : Nodup (l₁ ++ l₂) ↔ Nodup l₁ ∧ Nodup l₂ ∧ Disjoint l₁ l₂ := by
simp only [Nodup, pairwise_append, disjoint_iff_ne]
import Mathlib.Analysis.Normed.Group.Seminorm import Mathlib.Order.LiminfLimsup import Mathlib.Topology.Instances.Rat import Mathlib.Topology.MetricSpace.Algebra import Mathlib.Topology.MetricSpace.IsometricSMul import Mathlib.Topology.Sequences #align_import analysis.normed.group.basic from "leanprover-community/mat...
Mathlib/Analysis/Normed/Group/Basic.lean
429
430
theorem inseparable_one_iff_norm {a : E} : Inseparable a 1 ↔ ‖a‖ = 0 := by
rw [Metric.inseparable_iff, dist_one_right]
import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Data.Fintype.Card #align_import data.multiset.fintype from "leanprover-community/mathlib"@"e3d9ab8faa9dea8f78155c6c27d62a621f4c152d" variable {α : Type*} [DecidableEq α] {m : Multiset α} def Multiset.ToType (m : Multiset α) : Type _ := (x : α) × Fi...
Mathlib/Data/Multiset/Fintype.lean
185
191
theorem Multiset.map_univ_coeEmbedding (m : Multiset α) : (Finset.univ : Finset m).map m.coeEmbedding = m.toEnumFinset := by
ext ⟨x, i⟩ simp only [Fin.exists_iff, Finset.mem_map, Finset.mem_univ, Multiset.coeEmbedding_apply, Prod.mk.inj_iff, exists_true_left, Multiset.exists_coe, Multiset.coe_mk, Fin.val_mk, exists_prop, exists_eq_right_right, exists_eq_right, Multiset.mem_toEnumFinset, iff_self_iff, true_and_iff]
import Mathlib.Data.Set.Prod #align_import data.set.n_ary from "leanprover-community/mathlib"@"5e526d18cea33550268dcbbddcb822d5cde40654" open Function namespace Set variable {α α' β β' γ γ' δ δ' ε ε' ζ ζ' ν : Type*} {f f' : α → β → γ} {g g' : α → β → γ → δ} variable {s s' : Set α} {t t' : Set β} {u u' : Set γ} {v...
Mathlib/Data/Set/NAry.lean
262
270
theorem image2_image2_image2_comm {f : ε → ζ → ν} {g : α → β → ε} {h : γ → δ → ζ} {f' : ε' → ζ' → ν} {g' : α → γ → ε'} {h' : β → δ → ζ'} (h_comm : ∀ a b c d, f (g a b) (h c d) = f' (g' a c) (h' b d)) : image2 f (image2 g s t) (image2 h u v) = image2 f' (image2 g' s u) (image2 h' t v) := by
ext; constructor · rintro ⟨_, ⟨a, ha, b, hb, rfl⟩, _, ⟨c, hc, d, hd, rfl⟩, rfl⟩ exact ⟨_, ⟨a, ha, c, hc, rfl⟩, _, ⟨b, hb, d, hd, rfl⟩, (h_comm _ _ _ _).symm⟩ · rintro ⟨_, ⟨a, ha, c, hc, rfl⟩, _, ⟨b, hb, d, hd, rfl⟩, rfl⟩ exact ⟨_, ⟨a, ha, b, hb, rfl⟩, _, ⟨c, hc, d, hd, rfl⟩, h_comm _ _ _ _⟩
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.LinearAlgebra.AffineSpace.Slope #align_import analysis.calculus.deriv.slope from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w noncomputable section open Topology Filter TopologicalSpace open Filter Set secti...
Mathlib/Analysis/Calculus/Deriv/Slope.lean
153
156
theorem isSeparable_range_deriv [SeparableSpace 𝕜] (f : 𝕜 → F) : IsSeparable (range (deriv f)) := by
rw [← derivWithin_univ] exact isSeparable_range_derivWithin _ _
import Mathlib.Algebra.Polynomial.Degree.TrailingDegree import Mathlib.Algebra.Polynomial.EraseLead import Mathlib.Algebra.Polynomial.Eval #align_import data.polynomial.reverse from "leanprover-community/mathlib"@"44de64f183393284a16016dfb2a48ac97382f2bd" namespace Polynomial open Polynomial Finsupp Finset open...
Mathlib/Algebra/Polynomial/Reverse.lean
299
301
theorem reverse_leadingCoeff (f : R[X]) : f.reverse.leadingCoeff = f.trailingCoeff := by
rw [leadingCoeff, reverse_natDegree, ← revAt_le f.natTrailingDegree_le_natDegree, coeff_reverse, revAt_invol, trailingCoeff]
import Mathlib.Data.SetLike.Basic import Mathlib.Data.Finset.Preimage import Mathlib.ModelTheory.Semantics #align_import model_theory.definability from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" universe u v w u₁ namespace Set variable {M : Type w} (A : Set M) (L : FirstOrder.Lang...
Mathlib/ModelTheory/Definability.lean
116
122
theorem Definable.union {f g : Set (α → M)} (hf : A.Definable L f) (hg : A.Definable L g) : A.Definable L (f ∪ g) := by
rcases hf with ⟨φ, hφ⟩ rcases hg with ⟨θ, hθ⟩ refine ⟨φ ⊔ θ, ?_⟩ ext rw [hφ, hθ, mem_setOf_eq, Formula.realize_sup, mem_union, mem_setOf_eq, mem_setOf_eq]
import Mathlib.Data.List.OfFn import Mathlib.Data.List.Nodup import Mathlib.Data.List.Infix #align_import data.list.sort from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" open List.Perm universe u namespace List section sort variable {α : Type u} (r : α → α → Prop) [DecidableRe...
Mathlib/Data/List/Sort.lean
273
275
theorem orderedInsert_count [DecidableEq α] (L : List α) (a b : α) : count a (L.orderedInsert r b) = count a L + if a = b then 1 else 0 := by
rw [(L.perm_orderedInsert r b).count_eq, count_cons]
import Mathlib.Topology.Basic #align_import topology.nhds_set from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Set Filter Topology variable {X Y : Type*} [TopologicalSpace X] [TopologicalSpace Y] {f : Filter X} {s t s₁ s₂ t₁ t₂ : Set X} {x : X} theorem nhdsSet_diagonal (X) [T...
Mathlib/Topology/NhdsSet.lean
63
64
theorem mem_nhdsSet_iff_exists : s ∈ 𝓝ˢ t ↔ ∃ U : Set X, IsOpen U ∧ t ⊆ U ∧ U ⊆ s := by
rw [← subset_interior_iff_mem_nhdsSet, subset_interior_iff]
import Mathlib.Analysis.Calculus.FDeriv.Pi import Mathlib.Analysis.Calculus.Deriv.Basic variable {𝕜 ι : Type*} [DecidableEq ι] [Fintype ι] [NontriviallyNormedField 𝕜]
Mathlib/Analysis/Calculus/Deriv/Pi.lean
15
22
theorem hasDerivAt_update (x : ι → 𝕜) (i : ι) (y : 𝕜) : HasDerivAt (Function.update x i) (Pi.single i (1 : 𝕜)) y := by
convert (hasFDerivAt_update x y).hasDerivAt ext z j rw [Pi.single, Function.update_apply] split_ifs with h · simp [h] · simp [Pi.single_eq_of_ne h]
import Mathlib.Topology.UniformSpace.UniformConvergenceTopology #align_import topology.uniform_space.equicontinuity from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" section open UniformSpace Filter Set Uniformity Topology UniformConvergence Function variable {ι κ X X' Y Z α α' β β'...
Mathlib/Topology/UniformSpace/Equicontinuity.lean
692
699
theorem Filter.HasBasis.uniformEquicontinuousOn_iff_left {p : κ → Prop} {s : κ → Set (β × β)} {F : ι → β → α} {S : Set β} (hβ : (𝓤 β ⊓ 𝓟 (S ×ˢ S)).HasBasis p s) : UniformEquicontinuousOn F S ↔ ∀ U ∈ 𝓤 α, ∃ k, p k ∧ ∀ x y, (x, y) ∈ s k → ∀ i, (F i x, F i y) ∈ U := by
rw [uniformEquicontinuousOn_iff_uniformContinuousOn, UniformContinuousOn, hβ.tendsto_iff (UniformFun.hasBasis_uniformity ι α)] simp only [Prod.forall] rfl
import Mathlib.MeasureTheory.Integral.Lebesgue import Mathlib.Analysis.MeanInequalities import Mathlib.Analysis.MeanInequalitiesPow import Mathlib.MeasureTheory.Function.SpecialFunctions.Basic #align_import measure_theory.integral.mean_inequalities from "leanprover-community/mathlib"@"13bf7613c96a9fd66a81b9020a82cad9...
Mathlib/MeasureTheory/Integral/MeanInequalities.lean
66
79
theorem lintegral_mul_le_one_of_lintegral_rpow_eq_one {p q : ℝ} (hpq : p.IsConjExponent q) {f g : α → ℝ≥0∞} (hf : AEMeasurable f μ) (hf_norm : ∫⁻ a, f a ^ p ∂μ = 1) (hg_norm : ∫⁻ a, g a ^ q ∂μ = 1) : (∫⁻ a, (f * g) a ∂μ) ≤ 1 := by
calc (∫⁻ a : α, (f * g) a ∂μ) ≤ ∫⁻ a : α, f a ^ p / ENNReal.ofReal p + g a ^ q / ENNReal.ofReal q ∂μ := lintegral_mono fun a => young_inequality (f a) (g a) hpq _ = 1 := by simp only [div_eq_mul_inv] rw [lintegral_add_left'] · rw [lintegral_mul_const'' _ (hf.pow_const p), lint...
import Mathlib.RingTheory.Derivation.ToSquareZero import Mathlib.RingTheory.Ideal.Cotangent import Mathlib.RingTheory.IsTensorProduct import Mathlib.Algebra.Exact import Mathlib.Algebra.MvPolynomial.PDeriv import Mathlib.Algebra.Polynomial.Derivation #align_import ring_theory.kaehler from "leanprover-community/mathli...
Mathlib/RingTheory/Kaehler.lean
592
596
theorem KaehlerDifferential.quotKerTotalEquiv_symm_comp_D : (KaehlerDifferential.quotKerTotalEquiv R S).symm.toLinearMap.compDer (KaehlerDifferential.D R S) = KaehlerDifferential.derivationQuotKerTotal R S := by
convert (KaehlerDifferential.derivationQuotKerTotal R S).liftKaehlerDifferential_comp
import Mathlib.Tactic.CategoryTheory.Coherence import Mathlib.CategoryTheory.Monoidal.Free.Coherence #align_import category_theory.monoidal.coherence_lemmas from "leanprover-community/mathlib"@"b8b8bf3ea0c625fa1f950034a184e07c67f7bcfe" open CategoryTheory Category Iso namespace CategoryTheory.MonoidalCategory v...
Mathlib/CategoryTheory/Monoidal/CoherenceLemmas.lean
30
32
theorem leftUnitor_tensor'' (X Y : C) : (α_ (𝟙_ C) X Y).hom ≫ (λ_ (X ⊗ Y)).hom = (λ_ X).hom ⊗ 𝟙 Y := by
coherence
import Mathlib.Data.Set.Subsingleton import Mathlib.Logic.Equiv.Defs import Mathlib.Algebra.Group.Defs #align_import data.part from "leanprover-community/mathlib"@"80c43012d26f63026d362c3aba28f3c3bafb07e6" open Function structure Part.{u} (α : Type u) : Type u where Dom : Prop get : Dom → α #align part...
Mathlib/Data/Part.lean
745
746
theorem inv_mem_inv [Inv α] (a : Part α) (ma : α) (ha : ma ∈ a) : ma⁻¹ ∈ a⁻¹ := by
simp [inv_def]; aesop
import Mathlib.Algebra.Category.ModuleCat.Abelian import Mathlib.CategoryTheory.Limits.Shapes.Images #align_import algebra.category.Module.images from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" open CategoryTheory open CategoryTheory.Limits universe u v namespace ModuleCat set_op...
Mathlib/Algebra/Category/ModuleCat/Images.lean
81
85
theorem image.lift_fac (F' : MonoFactorisation f) : image.lift F' ≫ F'.m = image.ι f := by
ext x change (F'.e ≫ F'.m) _ = _ rw [F'.fac, (Classical.indefiniteDescription _ x.2).2] rfl
import Mathlib.Algebra.Algebra.Subalgebra.Operations import Mathlib.Algebra.Ring.Fin import Mathlib.RingTheory.Ideal.Quotient #align_import ring_theory.ideal.quotient_operations from "leanprover-community/mathlib"@"b88d81c84530450a8989e918608e5960f015e6c8" universe u v w namespace Ideal open Function RingHom var...
Mathlib/RingTheory/Ideal/QuotientOperations.lean
182
185
theorem mem_quotient_iff_mem_sup {I J : Ideal R} {x : R} : Quotient.mk I x ∈ J.map (Quotient.mk I) ↔ x ∈ J ⊔ I := by
rw [← mem_comap, comap_map_of_surjective (Quotient.mk I) Quotient.mk_surjective, ← ker_eq_comap_bot, mk_ker]
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
96
104
theorem mem_of_pi_mem_pi [∀ i, NeBot (f i)] {I : Set ι} (h : I.pi s ∈ pi f) {i : ι} (hi : i ∈ I) : s i ∈ f i := by
rcases mem_pi.1 h with ⟨I', -, t, htf, hts⟩ refine mem_of_superset (htf i) fun x hx => ?_ have : ∀ i, (t i).Nonempty := fun i => nonempty_of_mem (htf i) choose g hg using this have : update g i x ∈ I'.pi t := fun j _ => by rcases eq_or_ne j i with (rfl | hne) <;> simp [*] simpa using hts this i hi
import Mathlib.Analysis.Normed.Group.Seminorm import Mathlib.Order.LiminfLimsup import Mathlib.Topology.Instances.Rat import Mathlib.Topology.MetricSpace.Algebra import Mathlib.Topology.MetricSpace.IsometricSMul import Mathlib.Topology.Sequences #align_import analysis.normed.group.basic from "leanprover-community/mat...
Mathlib/Analysis/Normed/Group/Basic.lean
673
676
theorem norm_le_mul_norm_add (u v : E) : ‖u‖ ≤ ‖u * v‖ + ‖v‖ := calc ‖u‖ = ‖u * v / v‖ := by
rw [mul_div_cancel_right] _ ≤ ‖u * v‖ + ‖v‖ := norm_div_le _ _
import Mathlib.LinearAlgebra.CliffordAlgebra.Basic import Mathlib.Data.ZMod.Basic import Mathlib.RingTheory.GradedAlgebra.Basic #align_import linear_algebra.clifford_algebra.grading from "leanprover-community/mathlib"@"34020e531ebc4e8aac6d449d9eecbcd1508ea8d0" namespace CliffordAlgebra variable {R M : Type*} [Co...
Mathlib/LinearAlgebra/CliffordAlgebra/Grading.lean
140
149
theorem iSup_ι_range_eq_top : ⨆ i : ℕ, LinearMap.range (ι Q) ^ i = ⊤ := by
rw [← (DirectSum.Decomposition.isInternal (evenOdd Q)).submodule_iSup_eq_top, eq_comm] calc -- Porting note: needs extra annotations, no longer unifies against the goal in the face of -- ambiguity ⨆ (i : ZMod 2) (j : { n : ℕ // ↑n = i }), LinearMap.range (ι Q) ^ (j : ℕ) = ⨆ i : Σ i : ZMod 2, { ...
import Mathlib.RingTheory.GradedAlgebra.HomogeneousIdeal #align_import ring_theory.graded_algebra.radical from "leanprover-community/mathlib"@"f1944b30c97c5eb626e498307dec8b022a05bd0a" open GradedRing DirectSum SetLike Finset variable {ι σ A : Type*} variable [CommRing A] variable [LinearOrderedCancelAddCommMono...
Mathlib/RingTheory/GradedAlgebra/Radical.lean
47
136
theorem Ideal.IsHomogeneous.isPrime_of_homogeneous_mem_or_mem {I : Ideal A} (hI : I.IsHomogeneous 𝒜) (I_ne_top : I ≠ ⊤) (homogeneous_mem_or_mem : ∀ {x y : A}, Homogeneous 𝒜 x → Homogeneous 𝒜 y → x * y ∈ I → x ∈ I ∨ y ∈ I) : Ideal.IsPrime I := ⟨I_ne_top, by intro x y hxy by_contra! rid ...
intro x hx rw [filter_nonempty_iff] contrapose! hx simp_rw [proj_apply] at hx rw [← sum_support_decompose 𝒜 x] exact Ideal.sum_mem _ hx set max₁ := set₁.max' (nonempty x rid₁) set max₂ := set₂.max' (nonempty y rid₂) have mem_max₁ : max₁ ∈ set₁ := max'_...
import Mathlib.Data.Finsupp.Basic import Mathlib.Data.List.AList #align_import data.finsupp.alist from "leanprover-community/mathlib"@"59694bd07f0a39c5beccba34bd9f413a160782bf" namespace Finsupp variable {α M : Type*} [Zero M] @[simps] noncomputable def toAList (f : α →₀ M) : AList fun _x : α => M := ⟨f.grap...
Mathlib/Data/Finsupp/AList.lean
48
49
theorem mem_toAlist {f : α →₀ M} {x : α} : x ∈ f.toAList ↔ f x ≠ 0 := by
classical rw [AList.mem_keys, ← List.mem_toFinset, toAList_keys_toFinset, mem_support_iff]
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
221
226
theorem QuasiSeparated.affine_openCover_iff {X Y : Scheme.{u}} (𝒰 : Scheme.OpenCover.{u} Y) [∀ i, IsAffine (𝒰.obj i)] (f : X ⟶ Y) : QuasiSeparated f ↔ ∀ i, QuasiSeparatedSpace (pullback f (𝒰.map i)).carrier := by
rw [quasiSeparated_eq_affineProperty, QuasiSeparated.affineProperty_isLocal.affine_openCover_iff f 𝒰] rfl
import Mathlib.FieldTheory.Perfect #align_import field_theory.perfect_closure from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" universe u v open Function section variable (K : Type u) [CommRing K] (p : ℕ) [Fact p.Prime] [CharP K p] @[mk_iff] inductive PerfectClosure.R : ℕ × K → ℕ...
Mathlib/FieldTheory/PerfectClosure.lean
403
407
theorem frobenius_mk (x : ℕ × K) : (frobenius (PerfectClosure K p) p : PerfectClosure K p → PerfectClosure K p) (mk K p x) = mk _ _ (x.1, x.2 ^ p) := by
simp only [frobenius_def] exact mk_pow K p x p
import Mathlib.Algebra.Group.Semiconj.Defs import Mathlib.Algebra.Ring.Defs #align_import algebra.ring.semiconj from "leanprover-community/mathlib"@"70d50ecfd4900dd6d328da39ab7ebd516abe4025" universe u v w x variable {α : Type u} {β : Type v} {γ : Type w} {R : Type x} open Function namespace SemiconjBy @[simp...
Mathlib/Algebra/Ring/Semiconj.lean
95
97
theorem sub_left (ha : SemiconjBy a x y) (hb : SemiconjBy b x y) : SemiconjBy (a - b) x y := by
simpa only [sub_eq_add_neg] using ha.add_left hb.neg_left
import Mathlib.Analysis.Calculus.Deriv.Inv import Mathlib.Analysis.NormedSpace.BallAction import Mathlib.Analysis.SpecialFunctions.ExpDeriv import Mathlib.Analysis.InnerProductSpace.Calculus import Mathlib.Analysis.InnerProductSpace.PiL2 import Mathlib.Geometry.Manifold.Algebra.LieGroup import Mathlib.Geometry.Manifol...
Mathlib/Geometry/Manifold/Instances/Sphere.lean
170
179
theorem contDiff_stereoInvFunAux : ContDiff ℝ ⊤ (stereoInvFunAux v) := by
have h₀ : ContDiff ℝ ⊤ fun w : E => ‖w‖ ^ 2 := contDiff_norm_sq ℝ have h₁ : ContDiff ℝ ⊤ fun w : E => (‖w‖ ^ 2 + 4)⁻¹ := by refine (h₀.add contDiff_const).inv ?_ intro x nlinarith have h₂ : ContDiff ℝ ⊤ fun w => (4 : ℝ) • w + (‖w‖ ^ 2 - 4) • v := by refine (contDiff_const.smul contDiff_id).add ?_...
import Lean.Elab.Tactic.Location import Mathlib.Logic.Basic import Mathlib.Init.Order.Defs import Mathlib.Tactic.Conv import Mathlib.Init.Set import Lean.Elab.Tactic.Location set_option autoImplicit true namespace Mathlib.Tactic.PushNeg open Lean Meta Elab.Tactic Parser.Tactic variable (p q : Prop) (s : α → Prop)...
Mathlib/Tactic/PushNeg.lean
47
48
theorem empty_ne_eq_nonempty (s : Set γ) : (∅ ≠ s) = s.Nonempty := by
rw [ne_comm, ne_empty_eq_nonempty]
import Mathlib.Analysis.SpecialFunctions.Pow.Asymptotics import Mathlib.NumberTheory.Liouville.Basic import Mathlib.Topology.Instances.Irrational #align_import number_theory.liouville.liouville_with from "leanprover-community/mathlib"@"0b9eaaa7686280fad8cce467f5c3c57ee6ce77f8" open Filter Metric Real Set open sc...
Mathlib/NumberTheory/Liouville/LiouvilleWith.lean
178
179
theorem nat_mul (h : LiouvilleWith p x) (hn : n ≠ 0) : LiouvilleWith p (n * x) := by
rw [mul_comm]; exact h.mul_nat hn
import Mathlib.CategoryTheory.Generator import Mathlib.CategoryTheory.Preadditive.Yoneda.Basic #align_import category_theory.preadditive.generator from "leanprover-community/mathlib"@"09f981f72d43749f1fa072deade828d9c1e185bb" universe v u open CategoryTheory Opposite namespace CategoryTheory variable {C : Type...
Mathlib/CategoryTheory/Preadditive/Generator.lean
54
59
theorem isSeparator_iff_faithful_preadditiveCoyoneda (G : C) : IsSeparator G ↔ (preadditiveCoyoneda.obj (op G)).Faithful := by
rw [isSeparator_iff_faithful_coyoneda_obj, ← whiskering_preadditiveCoyoneda, Functor.comp_obj, whiskeringRight_obj_obj] exact ⟨fun h => Functor.Faithful.of_comp _ (forget AddCommGroupCat), fun h => Functor.Faithful.comp _ _⟩
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.Analysis.Calculus.FDeriv.Mul import Mathlib.Analysis.Calculus.FDeriv.Add #align_import analysis.calculus.deriv.mul from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w noncomputable section open scoped Classical...
Mathlib/Analysis/Calculus/Deriv/Mul.lean
120
123
theorem HasDerivWithinAt.smul_const (hc : HasDerivWithinAt c c' s x) (f : F) : HasDerivWithinAt (fun y => c y • f) (c' • f) s x := by
have := hc.smul (hasDerivWithinAt_const x s f) rwa [smul_zero, zero_add] at this
import Mathlib.Init.Core import Mathlib.RingTheory.Polynomial.Cyclotomic.Roots import Mathlib.NumberTheory.NumberField.Basic import Mathlib.FieldTheory.Galois #align_import number_theory.cyclotomic.basic from "leanprover-community/mathlib"@"4b05d3f4f0601dca8abf99c4ec99187682ed0bba" open Polynomial Algebra FiniteD...
Mathlib/NumberTheory/Cyclotomic/Basic.lean
231
244
theorem iff_union_of_dvd (h : ∀ s ∈ S, n ∣ s) (hS : S.Nonempty) : IsCyclotomicExtension S A B ↔ IsCyclotomicExtension (S ∪ {n}) A B := by
refine ⟨fun H => of_union_of_dvd A B h hS, fun H => (iff_adjoin_eq_top _ A _).2 ⟨fun s hs => ?_, ?_⟩⟩ · exact H.exists_prim_root (subset_union_left hs) · rw [_root_.eq_top_iff, ← ((iff_adjoin_eq_top _ A B).1 H).2] refine adjoin_mono fun x hx => ?_ simp only [union_singleton, mem_insert_iff, mem_setOf...
import Mathlib.Topology.MetricSpace.Basic #align_import topology.metric_space.metrizable from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Set Filter Metric open scoped Filter Topology namespace TopologicalSpace variable {ι X Y : Type*} {π : ι → Type*} [TopologicalSpace X] [Top...
Mathlib/Topology/Metrizable/Basic.lean
133
137
theorem IsSeparable.secondCountableTopology [PseudoMetrizableSpace X] {s : Set X} (hs : IsSeparable s) : SecondCountableTopology s := by
letI := pseudoMetrizableSpacePseudoMetric X have := hs.separableSpace exact UniformSpace.secondCountable_of_separable s
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
83
84
theorem Ico_eq_empty_iff : Ico a b = ∅ ↔ ¬a < b := by
rw [← coe_eq_empty, coe_Ico, Set.Ico_eq_empty_iff]
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]
import Mathlib.Topology.UniformSpace.CompactConvergence import Mathlib.Topology.UniformSpace.Equicontinuity import Mathlib.Topology.UniformSpace.Equiv open Set Filter Uniformity Topology Function UniformConvergence variable {ι X Y α β : Type*} [TopologicalSpace X] [UniformSpace α] [UniformSpace β] variable {F : ι ...
Mathlib/Topology/UniformSpace/Ascoli.lean
354
364
theorem EquicontinuousOn.tendsto_uniformOnFun_iff_pi {𝔖 : Set (Set X)} (𝔖_compact : ∀ K ∈ 𝔖, IsCompact K) (𝔖_covers : ⋃₀ 𝔖 = univ) (F_eqcont : ∀ K ∈ 𝔖, EquicontinuousOn F K) (ℱ : Filter ι) (f : X → α) : Tendsto (UniformOnFun.ofFun 𝔖 ∘ F) ℱ (𝓝 <| UniformOnFun.ofFun 𝔖 f) ↔ Tendsto F ℱ (𝓝 f) := b...
rw [eq_univ_iff_forall] at 𝔖_covers let φ : ((⋃₀ 𝔖) → α) ≃ₜ (X → α) := Homeomorph.piCongrLeft (Y := fun _ ↦ α) (Equiv.subtypeUnivEquiv 𝔖_covers) rw [EquicontinuousOn.tendsto_uniformOnFun_iff_pi' 𝔖_compact F_eqcont, show restrict (⋃₀ 𝔖) ∘ F = φ.symm ∘ F by rfl, show restrict (⋃₀ 𝔖) f = φ.symm f by...
import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Data.List.MinMax import Mathlib.Algebra.Tropical.Basic import Mathlib.Order.ConditionallyCompleteLattice.Finset #align_import algebra.tropical.big_operators from "leanprover-community/mathlib"@"d6fad0e5bf2d6f48da9175d25c3dc5706b3834ce" variable {R S :...
Mathlib/Algebra/Tropical/BigOperators.lean
51
55
theorem trop_sum [AddCommMonoid R] (s : Finset S) (f : S → R) : trop (∑ i ∈ s, f i) = ∏ i ∈ s, trop (f i) := by
convert Multiset.trop_sum (s.val.map f) simp only [Multiset.map_map, Function.comp_apply] rfl
import Mathlib.Analysis.Calculus.ContDiff.Defs import Mathlib.Analysis.Calculus.FDeriv.Add import Mathlib.Analysis.Calculus.FDeriv.Mul import Mathlib.Analysis.Calculus.Deriv.Inverse #align_import analysis.calculus.cont_diff from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" noncomputab...
Mathlib/Analysis/Calculus/ContDiff/Basic.lean
201
206
theorem IsBoundedBilinearMap.contDiff (hb : IsBoundedBilinearMap 𝕜 b) : ContDiff 𝕜 n b := by
suffices h : ContDiff 𝕜 ∞ b from h.of_le le_top rw [contDiff_top_iff_fderiv] refine ⟨hb.differentiable, ?_⟩ simp only [hb.fderiv] exact hb.isBoundedLinearMap_deriv.contDiff
import Mathlib.Combinatorics.SetFamily.Shadow #align_import combinatorics.set_family.compression.uv from "leanprover-community/mathlib"@"6f8ab7de1c4b78a68ab8cf7dd83d549eb78a68a1" open Finset variable {α : Type*} theorem sup_sdiff_injOn [GeneralizedBooleanAlgebra α] (u v : α) : { x | Disjoint u x ∧ v ≤ x }....
Mathlib/Combinatorics/SetFamily/Compression/UV.lean
142
151
theorem compress_injOn : Set.InjOn (compress u v) ↑(s.filter (compress u v · ∉ s)) := by
intro a ha b hb hab rw [mem_coe, mem_filter] at ha hb rw [compress] at ha hab split_ifs at ha hab with has · rw [compress] at hb hab split_ifs at hb hab with hbs · exact sup_sdiff_injOn u v has hbs hab · exact (hb.2 hb.1).elim · exact (ha.2 ha.1).elim
import Mathlib.Algebra.Order.Sub.Defs import Mathlib.Data.Finset.Basic import Mathlib.Order.Interval.Finset.Defs open Function namespace Finset class HasAntidiagonal (A : Type*) [AddMonoid A] where antidiagonal : A → Finset (A × A) mem_antidiagonal {n} {a} : a ∈ antidiagonal n ↔ a.fst + a.snd = n exp...
Mathlib/Data/Finset/Antidiagonal.lean
169
174
theorem filter_snd_eq_antidiagonal (n m : A) [DecidablePred (· = m)] [Decidable (m ≤ n)] : filter (fun x : A × A ↦ x.snd = m) (antidiagonal n) = if m ≤ n then {(n - m, m)} else ∅ := by
have : (fun x : A × A ↦ (x.snd = m)) ∘ Prod.swap = fun x : A × A ↦ x.fst = m := by ext; simp rw [← map_swap_antidiagonal, filter_map] simp [this, filter_fst_eq_antidiagonal, apply_ite (Finset.map _)]
import Mathlib.Order.Filter.Lift import Mathlib.Topology.Defs.Filter #align_import topology.basic from "leanprover-community/mathlib"@"e354e865255654389cc46e6032160238df2e0f40" noncomputable section open Set Filter universe u v w x def TopologicalSpace.ofClosed {X : Type u} (T : Set (Set X)) (empty_mem : ∅ ∈...
Mathlib/Topology/Basic.lean
1,614
1,615
theorem ContinuousAt.comp_of_eq {g : Y → Z} (hg : ContinuousAt g y) (hf : ContinuousAt f x) (hy : f x = y) : ContinuousAt (g ∘ f) x := by
subst hy; exact hg.comp hf
import Mathlib.Topology.Algebra.Algebra import Mathlib.Topology.ContinuousFunction.Compact import Mathlib.Topology.UrysohnsLemma import Mathlib.Analysis.RCLike.Basic import Mathlib.Analysis.NormedSpace.Units import Mathlib.Topology.Algebra.Module.CharacterSpace #align_import topology.continuous_function.ideals from "...
Mathlib/Topology/ContinuousFunction/Ideals.lean
118
120
theorem not_mem_setOfIdeal {I : Ideal C(X, R)} {x : X} : x ∉ setOfIdeal I ↔ ∀ ⦃f : C(X, R)⦄, f ∈ I → f x = 0 := by
rw [← Set.mem_compl_iff, setOfIdeal, compl_compl, Set.mem_setOf]
import Mathlib.Combinatorics.SimpleGraph.Connectivity import Mathlib.Data.Nat.Lattice #align_import combinatorics.simple_graph.metric from "leanprover-community/mathlib"@"352ecfe114946c903338006dd3287cb5a9955ff2" namespace SimpleGraph variable {V : Type*} (G : SimpleGraph V) noncomputable def dist (u v : V)...
Mathlib/Combinatorics/SimpleGraph/Metric.lean
144
153
theorem Walk.isPath_of_length_eq_dist {u v : V} (p : G.Walk u v) (hp : p.length = G.dist u v) : p.IsPath := by
classical have : p.bypass = p := by apply Walk.bypass_eq_self_of_length_le calc p.length _ = G.dist u v := hp _ ≤ p.bypass.length := dist_le p.bypass rw [← this] apply Walk.bypass_isPath
import Mathlib.Algebra.Group.Basic import Mathlib.Algebra.Group.Pi.Basic import Mathlib.Order.Fin import Mathlib.Order.PiLex import Mathlib.Order.Interval.Set.Basic #align_import data.fin.tuple.basic from "leanprover-community/mathlib"@"ef997baa41b5c428be3fb50089a7139bf4ee886b" assert_not_exists MonoidWithZero un...
Mathlib/Data/Fin/Tuple/Basic.lean
645
651
theorem comp_snoc {α : Type*} {β : Type*} (g : α → β) (q : Fin n → α) (y : α) : g ∘ snoc q y = snoc (g ∘ q) (g y) := by
ext j by_cases h : j.val < n · simp [h, snoc, castSucc_castLT] · rw [eq_last_of_not_lt h] simp
import Mathlib.Data.Set.Lattice #align_import data.semiquot from "leanprover-community/mathlib"@"09597669f02422ed388036273d8848119699c22f" -- Porting note: removed universe parameter structure Semiquot (α : Type*) where mk' :: s : Set α val : Trunc s #align semiquot Semiquot namespace Semiquot vari...
Mathlib/Data/Semiquot.lean
115
117
theorem liftOn_ofMem (q : Semiquot α) (f : α → β) (h : ∀ a ∈ q, ∀ b ∈ q, f a = f b) (a : α) (aq : a ∈ q) : liftOn q f h = f a := by
revert h; rw [eq_mk_of_mem aq]; intro; rfl
import Mathlib.Algebra.Order.Group.Indicator import Mathlib.Analysis.Normed.Group.Basic #align_import analysis.normed_space.indicator_function from "leanprover-community/mathlib"@"17ef379e997badd73e5eabb4d38f11919ab3c4b3" variable {α E : Type*} [SeminormedAddCommGroup E] {s t : Set α} (f : α → E) (a : α) open Se...
Mathlib/Analysis/NormedSpace/IndicatorFunction.lean
34
37
theorem norm_indicator_le_of_subset (h : s ⊆ t) (f : α → E) (a : α) : ‖indicator s f a‖ ≤ ‖indicator t f a‖ := by
simp only [norm_indicator_eq_indicator_norm] exact indicator_le_indicator_of_subset ‹_› (fun _ => norm_nonneg _) _
import Mathlib.Data.List.Nodup import Mathlib.Data.List.Zip import Mathlib.Data.Nat.Defs import Mathlib.Data.List.Infix #align_import data.list.rotate from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" universe u variable {α : Type u} open Nat Function namespace List theorem rotate...
Mathlib/Data/List/Rotate.lean
427
433
theorem IsRotated.symm (h : l ~r l') : l' ~r l := by
obtain ⟨n, rfl⟩ := h cases' l with hd tl · exists 0 · use (hd :: tl).length * n - n rw [rotate_rotate, Nat.add_sub_cancel', rotate_length_mul] exact Nat.le_mul_of_pos_left _ (by simp)
import Mathlib.SetTheory.Ordinal.Arithmetic import Mathlib.Tactic.TFAE import Mathlib.Topology.Order.Monotone #align_import set_theory.ordinal.topology from "leanprover-community/mathlib"@"740acc0e6f9adf4423f92a485d0456fc271482da" noncomputable section universe u v open Cardinal Order Topology namespace Ordina...
Mathlib/SetTheory/Ordinal/Topology.lean
145
149
theorem mem_closed_iff_bsup (hs : IsClosed s) : a ∈ s ↔ ∃ (o : Ordinal) (_ho : o ≠ 0) (f : ∀ a < o, Ordinal), (∀ i hi, f i hi ∈ s) ∧ bsup.{u, u} o f = a := by
rw [← mem_closure_iff_bsup, hs.closure_eq]
import Mathlib.Data.Nat.Factorial.Basic import Mathlib.Order.Monotone.Basic #align_import data.nat.choose.basic from "leanprover-community/mathlib"@"2f3994e1b117b1e1da49bcfb67334f33460c3ce4" open Nat namespace Nat def choose : ℕ → ℕ → ℕ | _, 0 => 1 | 0, _ + 1 => 0 | n + 1, k + 1 => choose n k + choose n ...
Mathlib/Data/Nat/Choose/Basic.lean
332
333
theorem choose_le_succ (a c : ℕ) : choose a c ≤ choose a.succ c := by
cases c <;> simp [Nat.choose_succ_succ]
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Basic import Mathlib.RingTheory.Ideal.Maps import Mathlib.RingTheory.MvPowerSeries.Basic #align_import ring_theory.power_series.basic from "leanprover-community/mathlib"@"2d5739b61641ee4e7e53eca5688a08f66f2e6a60" noncomputable section ...
Mathlib/RingTheory/PowerSeries/Basic.lean
499
505
theorem eq_shift_mul_X_add_const (φ : R⟦X⟧) : φ = (mk fun p => coeff R (p + 1) φ) * X + C R (constantCoeff R φ) := by
ext (_ | n) · simp only [Nat.zero_eq, coeff_zero_eq_constantCoeff, map_add, map_mul, constantCoeff_X, mul_zero, coeff_zero_C, zero_add] · simp only [coeff_succ_mul_X, coeff_mk, LinearMap.map_add, coeff_C, n.succ_ne_zero, sub_zero, if_false, add_zero]
import Mathlib.Analysis.InnerProductSpace.Basic import Mathlib.Analysis.SpecialFunctions.Trigonometric.Inverse #align_import geometry.euclidean.angle.unoriented.basic from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" assert_not_exists HasFDerivAt assert_not_exists ConformalAt noncom...
Mathlib/Geometry/Euclidean/Angle/Unoriented/Basic.lean
352
355
theorem cos_eq_zero_iff_angle_eq_pi_div_two : cos (angle x y) = 0 ↔ angle x y = π / 2 := by
rw [← cos_pi_div_two] apply injOn_cos.eq_iff ⟨angle_nonneg x y, angle_le_pi x y⟩ constructor <;> linarith [pi_pos]
import Mathlib.Analysis.Calculus.FDeriv.Equiv import Mathlib.Analysis.Calculus.FormalMultilinearSeries #align_import analysis.calculus.cont_diff_def from "leanprover-community/mathlib"@"3a69562db5a458db8322b190ec8d9a8bbd8a5b14" noncomputable section open scoped Classical open NNReal Topology Filter local notatio...
Mathlib/Analysis/Calculus/ContDiff/Defs.lean
223
226
theorem HasFTaylorSeriesUpToOn.continuousOn (h : HasFTaylorSeriesUpToOn n f p s) : ContinuousOn f s := by
have := (h.cont 0 bot_le).congr fun x hx => (h.zero_eq' hx).symm rwa [← (continuousMultilinearCurryFin0 𝕜 E F).symm.comp_continuousOn_iff]
import Mathlib.Geometry.Euclidean.Angle.Oriented.Affine import Mathlib.Geometry.Euclidean.Angle.Unoriented.RightAngle #align_import geometry.euclidean.angle.oriented.right_angle from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open scoped EuclideanGeometry ope...
Mathlib/Geometry/Euclidean/Angle/Oriented/RightAngle.lean
416
423
theorem tan_oangle_sub_right_mul_norm_of_oangle_eq_pi_div_two {x y : V} (h : o.oangle x y = ↑(π / 2)) : Real.Angle.tan (o.oangle y (y - x)) * ‖y‖ = ‖x‖ := by
have hs : (o.oangle y (y - x)).sign = 1 := by rw [oangle_sign_sub_right_swap, h, Real.Angle.sign_coe_pi_div_two] rw [o.oangle_eq_angle_of_sign_eq_one hs, Real.Angle.tan_coe, InnerProductGeometry.tan_angle_sub_mul_norm_of_inner_eq_zero (o.inner_rev_eq_zero_of_oangle_eq_pi_div_two h) (Or.inl (o.r...
import Mathlib.Algebra.Quaternion import Mathlib.Tactic.Ring #align_import algebra.quaternion_basis from "leanprover-community/mathlib"@"3aa5b8a9ed7a7cabd36e6e1d022c9858ab8a8c2d" open Quaternion namespace QuaternionAlgebra structure Basis {R : Type*} (A : Type*) [CommRing R] [Ring A] [Algebra R A] (c₁ c₂ : R) ...
Mathlib/Algebra/QuaternionBasis.lean
120
122
theorem lift_add (x y : ℍ[R,c₁,c₂]) : q.lift (x + y) = q.lift x + q.lift y := by
simp only [lift, add_re, map_add, add_imI, add_smul, add_imJ, add_imK] abel
import Mathlib.Data.Real.Sqrt import Mathlib.Analysis.NormedSpace.Star.Basic import Mathlib.Analysis.NormedSpace.ContinuousLinearMap import Mathlib.Analysis.NormedSpace.Basic #align_import data.is_R_or_C.basic from "leanprover-community/mathlib"@"baa88307f3e699fa7054ef04ec79fa4f056169cb" section local notation "�...
Mathlib/Analysis/RCLike/Basic.lean
758
760
theorem abs_re_div_norm_le_one (z : K) : |re z / ‖z‖| ≤ 1 := by
rw [abs_div, abs_norm] exact div_le_one_of_le (abs_re_le_norm _) (norm_nonneg _)
import Mathlib.Topology.Order.ProjIcc import Mathlib.Topology.CompactOpen import Mathlib.Topology.UnitInterval #align_import topology.path_connected from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section open scoped Classical open Topology Filter unitInterval Set Fun...
Mathlib/Topology/Connected/PathConnected.lean
178
181
theorem symm_symm (γ : Path x y) : γ.symm.symm = γ := by
ext t show γ (σ (σ t)) = γ t rw [unitInterval.symm_symm]
import Mathlib.Algebra.CharP.Two import Mathlib.Data.Nat.Factorization.Basic import Mathlib.Data.Nat.Periodic import Mathlib.Data.ZMod.Basic import Mathlib.Tactic.Monotonicity #align_import data.nat.totient from "leanprover-community/mathlib"@"5cc2dfdd3e92f340411acea4427d701dc7ed26f8" open Finset namespace Nat ...
Mathlib/Data/Nat/Totient.lean
221
224
theorem totient_prime_pow {p : ℕ} (hp : p.Prime) {n : ℕ} (hn : 0 < n) : φ (p ^ n) = p ^ (n - 1) * (p - 1) := by
rcases exists_eq_succ_of_ne_zero (pos_iff_ne_zero.1 hn) with ⟨m, rfl⟩ exact totient_prime_pow_succ hp _
import Mathlib.MeasureTheory.MeasurableSpace.Defs import Mathlib.Order.Filter.CountableInter open Filter Set MeasurableSpace variable {α : Type*} (m : MeasurableSpace α) (l : Filter α) [CountableInterFilter l] {s t : Set α} def EventuallyMeasurableSpace : MeasurableSpace α where MeasurableSet' s := ∃ t, Measu...
Mathlib/MeasureTheory/Constructions/EventuallyMeasurable.lean
67
70
theorem EventuallyMeasurableSet.congr (ht : EventuallyMeasurableSet m l t) (hst : s =ᶠ[l] t) : EventuallyMeasurableSet m l s := by
rcases ht with ⟨t', ht', htt'⟩ exact ⟨t', ht', hst.trans htt'⟩
import Mathlib.Topology.Category.TopCat.Limits.Pullbacks import Mathlib.Geometry.RingedSpace.LocallyRingedSpace #align_import algebraic_geometry.open_immersion.basic from "leanprover-community/mathlib"@"533f62f4dd62a5aad24a04326e6e787c8f7e98b1" -- Porting note: due to `PresheafedSpace`, `SheafedSpace` and `Locally...
Mathlib/Geometry/RingedSpace/OpenImmersion.lean
399
412
theorem pullback_cone_of_left_condition : pullbackConeOfLeftFst f g ≫ f = Y.ofRestrict _ ≫ g := by
-- Porting note: `ext` did not pick up `NatTrans.ext` refine PresheafedSpace.Hom.ext _ _ ?_ <| NatTrans.ext _ _ <| funext fun U => ?_ · simpa using pullback.condition · induction U using Opposite.rec' -- Porting note: `NatTrans.comp_app` is not picked up by `dsimp` -- Perhaps see : https://github.com/l...
import Mathlib.AlgebraicGeometry.Properties #align_import algebraic_geometry.function_field from "leanprover-community/mathlib"@"d39590fc8728fbf6743249802486f8c91ffe07bc" -- Explicit universe annotations were used in this file to improve perfomance #12737 set_option linter.uppercaseLean3 false universe u v open...
Mathlib/AlgebraicGeometry/FunctionField.lean
141
155
theorem IsAffineOpen.primeIdealOf_genericPoint {X : Scheme} [IsIntegral X] {U : Opens X.carrier} (hU : IsAffineOpen U) [h : Nonempty U] : hU.primeIdealOf ⟨genericPoint X.carrier, ((genericPoint_spec X.carrier).mem_open_set_iff U.isOpen).mpr (by simpa using h)⟩ = genericPoint (Scheme.Spec...
haveI : IsAffine _ := hU delta IsAffineOpen.primeIdealOf convert genericPoint_eq_of_isOpenImmersion ((X.restrict U.openEmbedding).isoSpec.hom ≫ Scheme.Spec.map (X.presheaf.map (eqToHom U.openEmbedding_obj_top).op).op) -- Porting note: this was `ext1` apply Subtype.ext exact (genericPoint_...
import Mathlib.Order.BooleanAlgebra import Mathlib.Logic.Equiv.Basic #align_import order.symm_diff from "leanprover-community/mathlib"@"6eb334bd8f3433d5b08ba156b8ec3e6af47e1904" open Function OrderDual variable {ι α β : Type*} {π : ι → Type*} def symmDiff [Sup α] [SDiff α] (a b : α) : α := a \ b ⊔ b \ a #ali...
Mathlib/Order/SymmDiff.lean
371
371
theorem bihimp_bot : a ⇔ ⊥ = aᶜ := by
simp [bihimp]
import Mathlib.SetTheory.Ordinal.Arithmetic import Mathlib.SetTheory.Ordinal.Exponential #align_import set_theory.ordinal.fixed_point from "leanprover-community/mathlib"@"0dd4319a17376eda5763cd0a7e0d35bbaaa50e83" noncomputable section universe u v open Function Order namespace Ordinal section variable {ι ...
Mathlib/SetTheory/Ordinal/FixedPoint.lean
183
193
theorem derivFamily_fp {i} (H : IsNormal (f i)) (o : Ordinal.{max u v}) : f i (derivFamily.{u, v} f o) = derivFamily.{u, v} f o := by
induction' o using limitRecOn with o _ o l IH · rw [derivFamily_zero] exact nfpFamily_fp H 0 · rw [derivFamily_succ] exact nfpFamily_fp H _ · rw [derivFamily_limit _ l, IsNormal.bsup.{max u v, u, max u v} H (fun a _ => derivFamily f a) l.1] refine eq_of_forall_ge_iff fun c => ?_ simp (con...
import Mathlib.Data.List.Count import Mathlib.Data.List.Dedup import Mathlib.Data.List.InsertNth import Mathlib.Data.List.Lattice import Mathlib.Data.List.Permutation import Mathlib.Data.Nat.Factorial.Basic #align_import data.list.perm from "leanprover-community/mathlib"@"65a1391a0106c9204fe45bc73a039f056558cb83" ...
Mathlib/Data/List/Perm.lean
586
603
theorem Perm.drop_inter [DecidableEq α] {xs ys : List α} (n : ℕ) (h : xs ~ ys) (h' : ys.Nodup) : xs.drop n ~ ys.inter (xs.drop n) := by
by_cases h'' : n ≤ xs.length · let n' := xs.length - n have h₀ : n = xs.length - n' := by rwa [Nat.sub_sub_self] have h₁ : n' ≤ xs.length := Nat.sub_le .. have h₂ : xs.drop n = (xs.reverse.take n').reverse := by rw [reverse_take _ h₁, h₀, reverse_reverse] rw [h₂] apply (reverse_perm _).tr...
import Mathlib.LinearAlgebra.CliffordAlgebra.Contraction variable {R M : Type*} variable [CommRing R] [AddCommGroup M] [Module R M] {Q : QuadraticForm R M} namespace CliffordAlgebra variable (Q) def invertibleιOfInvertible (m : M) [Invertible (Q m)] : Invertible (ι Q m) where invOf := ι Q (⅟ (Q m) • m) invO...
Mathlib/LinearAlgebra/CliffordAlgebra/Inversion.lean
66
69
theorem isUnit_of_isUnit_ι {m : M} (h : IsUnit (ι Q m)) : IsUnit (Q m) := by
cases h.nonempty_invertible letI := invertibleOfInvertibleι Q m exact isUnit_of_invertible (Q m)
import Mathlib.CategoryTheory.Sites.CompatiblePlus import Mathlib.CategoryTheory.Sites.ConcreteSheafification #align_import category_theory.sites.compatible_sheafification from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" namespace CategoryTheory.GrothendieckTopology open CategoryThe...
Mathlib/CategoryTheory/Sites/CompatibleSheafification.lean
129
131
theorem toSheafify_comp_sheafifyCompIso_inv : J.toSheafify _ ≫ (J.sheafifyCompIso F P).inv = whiskerRight (J.toSheafify _) _ := by
rw [Iso.comp_inv_eq]; simp
import Mathlib.Algebra.GroupPower.IterateHom import Mathlib.Algebra.Ring.Divisibility.Basic import Mathlib.Data.List.Cycle import Mathlib.Data.Nat.Prime import Mathlib.Data.PNat.Basic import Mathlib.Dynamics.FixedPoints.Basic import Mathlib.GroupTheory.GroupAction.Group #align_import dynamics.periodic_pts from "leanp...
Mathlib/Dynamics/PeriodicPts.lean
182
184
theorem eq_of_apply_eq_same (hx : IsPeriodicPt f n x) (hy : IsPeriodicPt f n y) (hn : 0 < n) (h : f x = f y) : x = y := by
rw [← hx.eq, ← hy.eq, ← iterate_pred_comp_of_pos f hn, comp_apply, comp_apply, h]
import Mathlib.Algebra.MvPolynomial.Supported import Mathlib.RingTheory.Derivation.Basic #align_import data.mv_polynomial.derivation from "leanprover-community/mathlib"@"b608348ffaeb7f557f2fd46876037abafd326ff3" namespace MvPolynomial noncomputable section variable {σ R A : Type*} [CommSemiring R] [AddCommMonoi...
Mathlib/Algebra/MvPolynomial/Derivation.lean
65
68
theorem derivation_C_mul (D : Derivation R (MvPolynomial σ R) A) (a : R) (f : MvPolynomial σ R) : C (σ := σ) a • D f = a • D f := by
have : C (σ := σ) a • D f = D (C a * f) := by simp rw [this, C_mul', D.map_smul]
import Mathlib.GroupTheory.Sylow import Mathlib.GroupTheory.Transfer #align_import group_theory.schur_zassenhaus from "leanprover-community/mathlib"@"d57133e49cf06508700ef69030cd099917e0f0de" namespace Subgroup section SchurZassenhausAbelian open MulOpposite MulAction Subgroup.leftTransversals MemLeftTransversa...
Mathlib/GroupTheory/SchurZassenhaus.lean
48
62
theorem smul_diff_smul' [hH : Normal H] (g : Gᵐᵒᵖ) : diff (MonoidHom.id H) (g • α) (g • β) = ⟨g.unop⁻¹ * (diff (MonoidHom.id H) α β : H) * g.unop, hH.mem_comm ((congr_arg (· ∈ H) (mul_inv_cancel_left _ _)).mpr (SetLike.coe_mem _))⟩ := by
letI := H.fintypeQuotientOfFiniteIndex let ϕ : H →* H := { toFun := fun h => ⟨g.unop⁻¹ * h * g.unop, hH.mem_comm ((congr_arg (· ∈ H) (mul_inv_cancel_left _ _)).mpr (SetLike.coe_mem _))⟩ map_one' := by rw [Subtype.ext_iff, coe_mk, coe_one, mul_one, inv_mul_self] map_mul' := fun h₁ ...
import Mathlib.Order.Interval.Multiset #align_import data.nat.interval from "leanprover-community/mathlib"@"1d29de43a5ba4662dd33b5cfeecfc2a27a5a8a29" -- TODO -- assert_not_exists Ring open Finset Nat variable (a b c : ℕ) namespace Nat instance instLocallyFiniteOrder : LocallyFiniteOrder ℕ where finsetIcc a b...
Mathlib/Order/Interval/Finset/Nat.lean
174
174
theorem Ico_succ_singleton : Ico a (a + 1) = {a} := by
rw [Ico_succ_right, Icc_self]
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
734
759
theorem nf_repr_split' : ∀ {o o' m} [NF o], split' o = (o', m) → NF o' ∧ repr o = ω * repr o' + m | 0, o', m, _, p => by injection p; substs o' m; simp [NF.zero] | oadd e n a, o', m, h, p => by by_cases e0 : e = 0 <;> simp [e0, split, split'] at p ⊢ · rcases p with ⟨rfl, rfl⟩ simp [h.zero_of_zero e0, ...
have := mt repr_inj.1 e0 rw [← opow_add, Ordinal.add_sub_cancel_of_le (one_le_iff_ne_zero.2 this)] refine ⟨NF.oadd (by infer_instance) _ ?_, ?_⟩ · simp at this ⊢ refine IH₁.below_of_lt' ((Ordinal.mul_lt_mul_iff_left omega_pos).1 <| lt_of_le_of_lt (le_add_right ...
import Mathlib.LinearAlgebra.ExteriorAlgebra.Basic import Mathlib.LinearAlgebra.CliffordAlgebra.Fold import Mathlib.LinearAlgebra.CliffordAlgebra.Conjugation import Mathlib.LinearAlgebra.Dual #align_import linear_algebra.clifford_algebra.contraction from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2...
Mathlib/LinearAlgebra/CliffordAlgebra/Contraction.lean
219
224
theorem contractLeft_comm (x : CliffordAlgebra Q) : d⌋(d'⌋x) = -(d'⌋(d⌋x)) := by
induction' x using CliffordAlgebra.left_induction with r x y hx hy m x hx · simp_rw [contractLeft_algebraMap, map_zero, neg_zero] · rw [map_add, map_add, map_add, map_add, hx, hy, neg_add] · simp only [contractLeft_ι_mul, map_sub, LinearMap.map_smul] rw [neg_sub, sub_sub_eq_add_sub, hx, mul_neg, ← sub_eq_a...
import Mathlib.Analysis.Calculus.Deriv.AffineMap import Mathlib.Analysis.Calculus.Deriv.Slope import Mathlib.Analysis.Calculus.Deriv.Mul import Mathlib.Analysis.Calculus.Deriv.Comp import Mathlib.Analysis.Calculus.LocalExtr.Rolle import Mathlib.Analysis.Convex.Normed import Mathlib.Analysis.RCLike.Basic #align_import...
Mathlib/Analysis/Calculus/MeanValue.lean
599
604
theorem is_const_of_fderivWithin_eq_zero (hs : Convex ℝ s) (hf : DifferentiableOn 𝕜 f s) (hf' : ∀ x ∈ s, fderivWithin 𝕜 f s x = 0) (hx : x ∈ s) (hy : y ∈ s) : f x = f y := by
have bound : ∀ x ∈ s, ‖fderivWithin 𝕜 f s x‖ ≤ 0 := fun x hx => by simp only [hf' x hx, norm_zero, le_rfl] simpa only [(dist_eq_norm _ _).symm, zero_mul, dist_le_zero, eq_comm] using hs.norm_image_sub_le_of_norm_fderivWithin_le hf bound hx hy
import Mathlib.CategoryTheory.Comma.Over import Mathlib.CategoryTheory.DiscreteCategory import Mathlib.CategoryTheory.EpiMono import Mathlib.CategoryTheory.Limits.Shapes.Terminal #align_import category_theory.limits.shapes.binary_products from "leanprover-community/mathlib"@"fec1d95fc61c750c1ddbb5b1f7f48b8e811a80d7" ...
Mathlib/CategoryTheory/Limits/Shapes/BinaryProducts.lean
747
750
theorem prod.lift_fst_comp_snd_comp {W X Y Z : C} [HasBinaryProduct W Y] [HasBinaryProduct X Z] (g : W ⟶ X) (g' : Y ⟶ Z) : prod.lift (prod.fst ≫ g) (prod.snd ≫ g') = prod.map g g' := by
rw [← prod.lift_map] simp
import Mathlib.Analysis.Convex.Between import Mathlib.Analysis.Convex.Normed import Mathlib.Analysis.Normed.Group.AddTorsor #align_import analysis.convex.side from "leanprover-community/mathlib"@"a63928c34ec358b5edcda2bf7513c50052a5230f" variable {R V V' P P' : Type*} open AffineEquiv AffineMap namespace Affine...
Mathlib/Analysis/Convex/Side.lean
62
67
theorem WSameSide.map {s : AffineSubspace R P} {x y : P} (h : s.WSameSide x y) (f : P →ᵃ[R] P') : (s.map f).WSameSide (f x) (f y) := by
rcases h with ⟨p₁, hp₁, p₂, hp₂, h⟩ refine ⟨f p₁, mem_map_of_mem f hp₁, f p₂, mem_map_of_mem f hp₂, ?_⟩ simp_rw [← linearMap_vsub] exact h.map f.linear
import Mathlib.Order.RelClasses import Mathlib.Order.Interval.Set.Basic #align_import order.bounded from "leanprover-community/mathlib"@"aba57d4d3dae35460225919dcd82fe91355162f9" namespace Set variable {α : Type*} {r : α → α → Prop} {s t : Set α} theorem Bounded.mono (hst : s ⊆ t) (hs : Bounded r t) : Bounde...
Mathlib/Order/Bounded.lean
44
45
theorem unbounded_le_iff [LinearOrder α] : Unbounded (· ≤ ·) s ↔ ∀ a, ∃ b ∈ s, a < b := by
simp only [Unbounded, not_le]
import Mathlib.Analysis.InnerProductSpace.Orthogonal import Mathlib.Analysis.Normed.Group.AddTorsor #align_import geometry.euclidean.basic from "leanprover-community/mathlib"@"2de9c37fa71dde2f1c6feff19876dd6a7b1519f0" open Set open scoped RealInnerProductSpace variable {V P : Type*} [NormedAddCommGroup V] [InnerP...
Mathlib/Geometry/Euclidean/PerpBisector.lean
65
67
theorem midpoint_mem_perpBisector (p₁ p₂ : P) : midpoint ℝ p₁ p₂ ∈ perpBisector p₁ p₂ := by
simp [mem_perpBisector_iff_inner_eq_zero]
import Mathlib.Logic.Relation import Mathlib.Data.Option.Basic import Mathlib.Data.Seq.Seq #align_import data.seq.wseq from "leanprover-community/mathlib"@"a7e36e48519ab281320c4d192da6a7b348ce40ad" namespace Stream' open Function universe u v w def WSeq (α) := Seq (Option α) #align stream.wseq Stream'.WSeq ...
Mathlib/Data/Seq/WSeq.lean
1,804
1,807
theorem bind_assoc (s : WSeq α) (f : α → WSeq β) (g : β → WSeq γ) : bind (bind s f) g ~ʷ bind s fun x : α => bind (f x) g := by
simp only [bind, map_join]; erw [← map_comp f (map g), map_comp (map g ∘ f) join] apply join_join
import Mathlib.Data.Finsupp.Multiset import Mathlib.Data.Nat.GCD.BigOperators import Mathlib.Data.Nat.PrimeFin import Mathlib.NumberTheory.Padics.PadicVal import Mathlib.Order.Interval.Finset.Nat #align_import data.nat.factorization.basic from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" ...
Mathlib/Data/Nat/Factorization/Basic.lean
170
173
theorem factorization_eq_zero_of_remainder {p r : ℕ} (i : ℕ) (hr : ¬p ∣ r) : (p * i + r).factorization p = 0 := by
apply factorization_eq_zero_of_not_dvd rwa [← Nat.dvd_add_iff_right (Dvd.intro i rfl)]
import Mathlib.Algebra.Order.Sub.Defs import Mathlib.Data.Finset.Basic import Mathlib.Order.Interval.Finset.Defs open Function namespace Finset class HasAntidiagonal (A : Type*) [AddMonoid A] where antidiagonal : A → Finset (A × A) mem_antidiagonal {n} {a} : a ∈ antidiagonal n ↔ a.fst + a.snd = n exp...
Mathlib/Data/Finset/Antidiagonal.lean
80
82
theorem swap_mem_antidiagonal [AddCommMonoid A] [HasAntidiagonal A] {n : A} {xy : A × A}: xy.swap ∈ antidiagonal n ↔ xy ∈ antidiagonal n := by
simp [add_comm]
import Mathlib.Data.Real.NNReal import Mathlib.RingTheory.Valuation.Basic noncomputable section open Function Multiplicative open scoped NNReal variable {R : Type*} [Ring R] {Γ₀ : Type*} [LinearOrderedCommGroupWithZero Γ₀] namespace Valuation class RankOne (v : Valuation R Γ₀) where hom : Γ₀ →*₀ ℝ≥0 st...
Mathlib/RingTheory/Valuation/RankOne.lean
67
69
theorem unit_ne_one : unit v ≠ 1 := by
rw [Ne, ← Units.eq_iff, Units.val_one] exact ((nontrivial v).choose_spec ).2
import Mathlib.Algebra.Associated import Mathlib.Algebra.Star.Unitary import Mathlib.RingTheory.Int.Basic import Mathlib.RingTheory.PrincipalIdealDomain import Mathlib.Tactic.Ring #align_import number_theory.zsqrtd.basic from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" @[ext] struct...
Mathlib/NumberTheory/Zsqrtd/Basic.lean
442
443
theorem sqLe_smul {c d x y : ℕ} (n : ℕ) (xy : SqLe x c y d) : SqLe (n * x) c (n * y) d := by
simpa [SqLe, mul_left_comm, mul_assoc] using Nat.mul_le_mul_left (n * n) xy
import Mathlib.Analysis.InnerProductSpace.Adjoint #align_import analysis.inner_product_space.positive from "leanprover-community/mathlib"@"caa58cbf5bfb7f81ccbaca4e8b8ac4bc2b39cc1c" open InnerProductSpace RCLike ContinuousLinearMap open scoped InnerProduct ComplexConjugate namespace ContinuousLinearMap variable...
Mathlib/Analysis/InnerProductSpace/Positive.lean
101
106
theorem IsPositive.conj_orthogonalProjection (U : Submodule 𝕜 E) {T : E →L[𝕜] E} (hT : T.IsPositive) [CompleteSpace U] : (U.subtypeL ∘L orthogonalProjection U ∘L T ∘L U.subtypeL ∘L orthogonalProjection U).IsPositive := by
have := hT.conj_adjoint (U.subtypeL ∘L orthogonalProjection U) rwa [(orthogonalProjection_isSelfAdjoint U).adjoint_eq] at this
import Mathlib.Analysis.InnerProductSpace.Dual import Mathlib.Analysis.InnerProductSpace.Orientation import Mathlib.Data.Complex.Orientation import Mathlib.Tactic.LinearCombination #align_import analysis.inner_product_space.two_dim from "leanprover-community/mathlib"@"cd8fafa2fac98e1a67097e8a91ad9901cfde48af" non...
Mathlib/Analysis/InnerProductSpace/TwoDim.lean
334
345
theorem rightAngleRotation_map {F : Type*} [NormedAddCommGroup F] [InnerProductSpace ℝ F] [hF : Fact (finrank ℝ F = 2)] (φ : E ≃ₗᵢ[ℝ] F) (x : F) : (Orientation.map (Fin 2) φ.toLinearEquiv o).rightAngleRotation x = φ (o.rightAngleRotation (φ.symm x)) := by
apply ext_inner_right ℝ intro y rw [inner_rightAngleRotation_left] trans ⟪J (φ.symm x), φ.symm y⟫ · simp [o.areaForm_map] trans ⟪φ (J (φ.symm x)), φ (φ.symm y)⟫ · rw [φ.inner_map_map] · simp
import Mathlib.Algebra.Associated import Mathlib.Algebra.BigOperators.Finsupp #align_import algebra.big_operators.associated from "leanprover-community/mathlib"@"f7fc89d5d5ff1db2d1242c7bb0e9062ce47ef47c" variable {α β γ δ : Type*} -- the same local notation used in `Algebra.Associated` local infixl:50 " ~ᵤ " => ...
Mathlib/Algebra/BigOperators/Associated.lean
103
111
theorem Finset.prod_primes_dvd [CancelCommMonoidWithZero α] [Unique αˣ] {s : Finset α} (n : α) (h : ∀ a ∈ s, Prime a) (div : ∀ a ∈ s, a ∣ n) : (∏ p ∈ s, p) ∣ n := by
classical exact Multiset.prod_primes_dvd n (by simpa only [Multiset.map_id', Finset.mem_def] using h) (by simpa only [Multiset.map_id', Finset.mem_def] using div) (by simp only [Multiset.map_id', associated_eq_eq, Multiset.countP_eq_card_filter, ← s.val.count_eq_card_f...
import Mathlib.GroupTheory.Solvable import Mathlib.FieldTheory.PolynomialGaloisGroup import Mathlib.RingTheory.RootsOfUnity.Basic #align_import field_theory.abel_ruffini from "leanprover-community/mathlib"@"e3f4be1fcb5376c4948d7f095bec45350bfb9d1a" noncomputable section open scoped Classical Polynomial Intermedi...
Mathlib/FieldTheory/AbelRuffini.lean
157
194
theorem splits_X_pow_sub_one_of_X_pow_sub_C {F : Type*} [Field F] {E : Type*} [Field E] (i : F →+* E) (n : ℕ) {a : F} (ha : a ≠ 0) (h : (X ^ n - C a).Splits i) : (X ^ n - 1 : F[X]).Splits i := by
have ha' : i a ≠ 0 := mt ((injective_iff_map_eq_zero i).mp i.injective a) ha by_cases hn : n = 0 · rw [hn, pow_zero, sub_self] exact splits_zero i have hn' : 0 < n := pos_iff_ne_zero.mpr hn have hn'' : (X ^ n - C a).degree ≠ 0 := ne_of_eq_of_ne (degree_X_pow_sub_C hn' a) (mt WithBot.coe_eq_coe.mp hn)...
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.MeasureTheory.Constructions.BorelSpace.ContinuousLinearMap import Mathlib.MeasureTheory.Covering.BesicovitchVectorSpace import Mathlib.MeasureTheory.Measure.Lebesgue.EqHaar import Mathlib.Analysis.NormedSpace.Pointwise import Mathlib.MeasureTheory.Constructio...
Mathlib/MeasureTheory/Function/Jacobian.lean
282
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theorem addHaar_image_le_mul_of_det_lt (A : E →L[ℝ] E) {m : ℝ≥0} (hm : ENNReal.ofReal |A.det| < m) : ∀ᶠ δ in 𝓝[>] (0 : ℝ≥0), ∀ (s : Set E) (f : E → E), ApproximatesLinearOn f A s δ → μ (f '' s) ≤ m * μ s := by
apply nhdsWithin_le_nhds let d := ENNReal.ofReal |A.det| -- construct a small neighborhood of `A '' (closedBall 0 1)` with measure comparable to -- the determinant of `A`. obtain ⟨ε, hε, εpos⟩ : ∃ ε : ℝ, μ (closedBall 0 ε + A '' closedBall 0 1) < m * μ (closedBall 0 1) ∧ 0 < ε := by have HC : IsCompa...
import Mathlib.Data.Real.Sqrt import Mathlib.Analysis.NormedSpace.Star.Basic import Mathlib.Analysis.NormedSpace.ContinuousLinearMap import Mathlib.Analysis.NormedSpace.Basic #align_import data.is_R_or_C.basic from "leanprover-community/mathlib"@"baa88307f3e699fa7054ef04ec79fa4f056169cb" section local notation "�...
Mathlib/Analysis/RCLike/Basic.lean
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theorem is_real_TFAE (z : K) : TFAE [conj z = z, ∃ r : ℝ, (r : K) = z, ↑(re z) = z, im z = 0] := by
tfae_have 1 → 4 · intro h rw [← @ofReal_inj K, im_eq_conj_sub, h, sub_self, mul_zero, zero_div, ofReal_zero] tfae_have 4 → 3 · intro h conv_rhs => rw [← re_add_im z, h, ofReal_zero, zero_mul, add_zero] tfae_have 3 → 2 · exact fun h => ⟨_, h⟩ tfae_have 2 → 1 · exact fun ⟨r, hr⟩ => hr ▸ con...
import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.NormedSpace.OperatorNorm.NormedSpace import Mathlib.Data.Complex.Determinant #align_import analysis.complex.operator_norm from "leanprover-community/mathlib"@"468b141b14016d54b479eb7a0fff1e360b7e3cf6" open ContinuousLinearMap namespace Complex @[simp...
Mathlib/Analysis/Complex/OperatorNorm.lean
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theorem reCLM_norm : ‖reCLM‖ = 1 := le_antisymm (LinearMap.mkContinuous_norm_le _ zero_le_one _) <| calc 1 = ‖reCLM 1‖ := by
simp _ ≤ ‖reCLM‖ := unit_le_opNorm _ _ (by simp)
import Mathlib.Combinatorics.SimpleGraph.Finite import Mathlib.Combinatorics.SimpleGraph.Maps #align_import combinatorics.simple_graph.subgraph from "leanprover-community/mathlib"@"c6ef6387ede9983aee397d442974e61f89dfd87b" universe u v namespace SimpleGraph @[ext] structure Subgraph {V : Type u} (G : SimpleGra...
Mathlib/Combinatorics/SimpleGraph/Subgraph.lean
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theorem iInf_adj {f : ι → G.Subgraph} : (⨅ i, f i).Adj a b ↔ (∀ i, (f i).Adj a b) ∧ G.Adj a b := by
simp [iInf]
import Mathlib.CategoryTheory.Opposites #align_import category_theory.eq_to_hom from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" universe v₁ v₂ v₃ u₁ u₂ u₃ -- morphism levels before object levels. See note [CategoryTheory universes]. namespace CategoryTheory open Opposite variable ...
Mathlib/CategoryTheory/EqToHom.lean
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theorem congr_hom {F G : C ⥤ D} (h : F = G) {X Y} (f : X ⟶ Y) : F.map f = eqToHom (congr_obj h X) ≫ G.map f ≫ eqToHom (congr_obj h Y).symm := by
subst h; simp
import Mathlib.Logic.Pairwise import Mathlib.Order.CompleteBooleanAlgebra import Mathlib.Order.Directed import Mathlib.Order.GaloisConnection #align_import data.set.lattice from "leanprover-community/mathlib"@"b86832321b586c6ac23ef8cdef6a7a27e42b13bd" open Function Set universe u variable {α β γ : Type*} {ι ι' ι...
Mathlib/Data/Set/Lattice.lean
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theorem mem_iUnion₂ {x : γ} {s : ∀ i, κ i → Set γ} : (x ∈ ⋃ (i) (j), s i j) ↔ ∃ i j, x ∈ s i j := by
simp_rw [mem_iUnion]