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import Mathlib.NumberTheory.Padics.PadicIntegers import Mathlib.RingTheory.ZMod #align_import number_theory.padics.ring_homs from "leanprover-community/mathlib"@"565eb991e264d0db702722b4bde52ee5173c9950" noncomputable section open scoped Classical open Nat LocalRing Padic namespace PadicInt variable {p : ℕ} [h...
Mathlib/NumberTheory/Padics/RingHoms.lean
153
156
theorem zmod_congr_of_sub_mem_span (n : ℕ) (x : ℤ_[p]) (a b : ℕ) (ha : x - a ∈ (Ideal.span {(p : ℤ_[p]) ^ n})) (hb : x - b ∈ (Ideal.span {(p : ℤ_[p]) ^ n})) : (a : ZMod (p ^ n)) = b := by
simpa using zmod_congr_of_sub_mem_span_aux n x a b ha hb
import Batteries.Data.UnionFind.Basic namespace Batteries.UnionFind @[simp] theorem arr_empty : empty.arr = #[] := rfl @[simp] theorem parent_empty : empty.parent a = a := rfl @[simp] theorem rank_empty : empty.rank a = 0 := rfl @[simp] theorem rootD_empty : empty.rootD a = a := rfl @[simp] theorem arr_push {m : Un...
.lake/packages/batteries/Batteries/Data/UnionFind/Lemmas.lean
41
51
theorem parentD_linkAux {self} {x y : Fin self.size} : parentD (linkAux self x y) i = if x.1 = y then parentD self i else if (self.get y).rank < (self.get x).rank then if y = i then x else parentD self i else if x = i then y else parentD self i := by
dsimp only [linkAux]; split <;> [rfl; split] <;> [rw [parentD_set]; split] <;> rw [parentD_set] split <;> [(subst i; rwa [if_neg, parentD_eq]); rw [parentD_set]]
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Basic import Mathlib.Analysis.Normed.Group.AddCircle import Mathlib.Algebra.CharZero.Quotient import Mathlib.Topology.Instances.Sign #align_import analysis.special_functions.trigonometric.angle from "leanprover-community/mathlib"@"213b0cff7bc5ab6696ee07cceec80829...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Angle.lean
890
891
theorem sign_pi_sub (θ : Angle) : ((π : Angle) - θ).sign = θ.sign := by
simp [sign_antiperiodic.sub_eq']
import Mathlib.RingTheory.IntegralClosure import Mathlib.RingTheory.FractionalIdeal.Basic #align_import ring_theory.fractional_ideal from "leanprover-community/mathlib"@"ed90a7d327c3a5caf65a6faf7e8a0d63c4605df7" open IsLocalization Pointwise nonZeroDivisors namespace FractionalIdeal open Set Submodule variable...
Mathlib/RingTheory/FractionalIdeal/Operations.lean
684
686
theorem spanSingleton_zero : spanSingleton S (0 : P) = 0 := by
ext simp [Submodule.mem_span_singleton, eq_comm]
import Mathlib.Algebra.Group.Subgroup.Basic import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Star.Pi #align_import algebra.star.self_adjoint from "leanprover-community/mathlib"@"a6ece35404f60597c651689c1b46ead86de5ac1b" open Function variable {R A : Type*} def IsSelfAdjoint [Star R] (x : R) : Prop := ...
Mathlib/Algebra/Star/SelfAdjoint.lean
290
291
theorem smul {r : R} (hr : IsSelfAdjoint r) {x : A} (hx : IsSelfAdjoint x) : IsSelfAdjoint (r • x) := by
simp only [isSelfAdjoint_iff, star_smul, hr.star_eq, hx.star_eq]
import Mathlib.Order.Lattice import Mathlib.Data.List.Sort import Mathlib.Logic.Equiv.Fin import Mathlib.Logic.Equiv.Functor import Mathlib.Data.Fintype.Card import Mathlib.Order.RelSeries #align_import order.jordan_holder from "leanprover-community/mathlib"@"91288e351d51b3f0748f0a38faa7613fb0ae2ada" universe u ...
Mathlib/Order/JordanHolder.lean
173
177
theorem total {s : CompositionSeries X} {x y : X} (hx : x ∈ s) (hy : y ∈ s) : x ≤ y ∨ y ≤ x := by
rcases Set.mem_range.1 hx with ⟨i, rfl⟩ rcases Set.mem_range.1 hy with ⟨j, rfl⟩ rw [s.strictMono.le_iff_le, s.strictMono.le_iff_le] exact le_total i j
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
648
658
theorem nfp_mul_eq_opow_omega {a b : Ordinal} (hb : 0 < b) (hba : b ≤ (a^omega)) : nfp (a * ·) b = (a^omega.{u}) := by
rcases eq_zero_or_pos a with ha | ha · rw [ha, zero_opow omega_ne_zero] at hba ⊢ rw [Ordinal.le_zero.1 hba, nfp_zero_mul] rfl apply le_antisymm · apply nfp_le_fp (mul_isNormal ha).monotone hba rw [← opow_one_add, one_add_omega] rw [← nfp_mul_one ha] exact nfp_monotone (mul_isNormal ha).monotone...
import Mathlib.Algebra.Module.Submodule.Ker #align_import linear_algebra.basic from "leanprover-community/mathlib"@"9d684a893c52e1d6692a504a118bfccbae04feeb" variable {R : Type*} {R₂ : Type*} variable {M : Type*} {M₂ : Type*} namespace LinearMap section AddCommMonoid variable [Semiring R] [Semiring R₂] varia...
Mathlib/Algebra/Module/Submodule/EqLocus.lean
64
65
theorem eqLocus_eq_top {f g : F} : eqLocus f g = ⊤ ↔ f = g := by
simp [SetLike.ext_iff, DFunLike.ext_iff]
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
288
292
theorem is_left_invariant_index {K : Set G} (hK : IsCompact K) (g : G) {V : Set G} (hV : (interior V).Nonempty) : index ((fun h => g * h) '' K) V = index K V := by
refine le_antisymm (mul_left_index_le hK hV g) ?_ convert mul_left_index_le (hK.image <| continuous_mul_left g) hV g⁻¹ rw [image_image]; symm; convert image_id' _ with h; apply inv_mul_cancel_left
import Mathlib.Analysis.Quaternion import Mathlib.Analysis.NormedSpace.Exponential import Mathlib.Analysis.SpecialFunctions.Trigonometric.Series #align_import analysis.normed_space.quaternion_exponential from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" open scoped Quaternion Nat open...
Mathlib/Analysis/NormedSpace/QuaternionExponential.lean
39
55
theorem expSeries_even_of_imaginary {q : Quaternion ℝ} (hq : q.re = 0) (n : ℕ) : expSeries ℝ (Quaternion ℝ) (2 * n) (fun _ => q) = ↑((-1 : ℝ) ^ n * ‖q‖ ^ (2 * n) / (2 * n)!) := by
rw [expSeries_apply_eq] have hq2 : q ^ 2 = -normSq q := sq_eq_neg_normSq.mpr hq letI k : ℝ := ↑(2 * n)! calc k⁻¹ • q ^ (2 * n) = k⁻¹ • (-normSq q) ^ n := by rw [pow_mul, hq2] _ = k⁻¹ • ↑((-1 : ℝ) ^ n * ‖q‖ ^ (2 * n)) := ?_ _ = ↑((-1 : ℝ) ^ n * ‖q‖ ^ (2 * n) / k) := ?_ · congr 1 rw [neg_pow, n...
import Mathlib.Analysis.RCLike.Basic import Mathlib.Analysis.NormedSpace.OperatorNorm.Basic import Mathlib.Analysis.NormedSpace.Pointwise #align_import analysis.normed_space.is_R_or_C from "leanprover-community/mathlib"@"3f655f5297b030a87d641ad4e825af8d9679eb0b" open Metric variable {𝕜 : Type*} [RCLike 𝕜] {E :...
Mathlib/Analysis/NormedSpace/RCLike.lean
43
45
theorem norm_smul_inv_norm {x : E} (hx : x ≠ 0) : ‖(‖x‖⁻¹ : 𝕜) • x‖ = 1 := by
have : ‖x‖ ≠ 0 := by simp [hx] field_simp [norm_smul]
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
173
179
theorem count_injective_image [MeasurableSingletonClass α] [MeasurableSingletonClass β] {f : β → α} (hf : Function.Injective f) (s : Set β) : count (f '' s) = count s := by
by_cases hs : s.Finite · exact count_injective_image' hf hs.measurableSet (Finite.image f hs).measurableSet rw [count_apply_infinite hs] rw [← finite_image_iff hf.injOn] at hs rw [count_apply_infinite hs]
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
59
65
theorem map_id_c_app (F : J ⥤ PresheafedSpace.{_, _, v} C) (j) (U) : (F.map (𝟙 j)).c.app (op U) = (Pushforward.id (F.obj j).presheaf).inv.app (op U) ≫ (pushforwardEq (by simp) (F.obj j).presheaf).hom.app (op U) := by
cases U simp [PresheafedSpace.congr_app (F.map_id j)]
import Mathlib.Algebra.Group.Prod import Mathlib.Data.Set.Lattice #align_import data.nat.pairing from "leanprover-community/mathlib"@"207cfac9fcd06138865b5d04f7091e46d9320432" assert_not_exists MonoidWithZero open Prod Decidable Function namespace Nat -- Porting note: no pp_nodot --@[pp_nodot] def pair (a b : ...
Mathlib/Data/Nat/Pairing.lean
117
119
theorem right_le_pair (a b : ℕ) : b ≤ pair a b := by
by_cases h : a < b <;> simp [pair, h] exact le_trans (le_mul_self _) (Nat.le_add_right _ _)
import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Algebra.Ring.Pi import Mathlib.GroupTheory.GroupAction.Pi #align_import algebra.big_operators.pi from "leanprover-community/mathlib"@"fa2309577c7009ea243cffdf990cd6c84f0ad497" @[to_additive (attr := simp)] theorem Finset.prod_apply {α : Type*} {β : α...
Mathlib/Algebra/BigOperators/Pi.lean
81
84
theorem Finset.univ_prod_mulSingle [Fintype I] (f : ∀ i, Z i) : (∏ i, Pi.mulSingle i (f i)) = f := by
ext a simp
import Mathlib.Dynamics.Ergodic.MeasurePreserving import Mathlib.LinearAlgebra.Determinant import Mathlib.LinearAlgebra.Matrix.Diagonal import Mathlib.LinearAlgebra.Matrix.Transvection import Mathlib.MeasureTheory.Group.LIntegral import Mathlib.MeasureTheory.Integral.Marginal import Mathlib.MeasureTheory.Measure.Stiel...
Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean
113
114
theorem volume_closedBall (a r : ℝ) : volume (Metric.closedBall a r) = ofReal (2 * r) := by
rw [closedBall_eq_Icc, volume_Icc, ← sub_add, add_sub_cancel_left, two_mul]
import Mathlib.MeasureTheory.Group.Measure import Mathlib.MeasureTheory.Integral.IntegrableOn import Mathlib.MeasureTheory.Function.LocallyIntegrable open Asymptotics MeasureTheory Set Filter variable {α E F : Type*} [MeasurableSpace α] [NormedAddCommGroup E] [NormedAddCommGroup F] {f : α → E} {g : α → F} {a b :...
Mathlib/MeasureTheory/Integral/Asymptotics.lean
105
109
theorem LocallyIntegrable.integrable_of_isBigO_atTop [IsMeasurablyGenerated (atTop (α := α))] [OrderBot α] (hf : LocallyIntegrable f μ) (ho : f =O[atTop] g) (hg : IntegrableAtFilter g atTop μ) : Integrable f μ := by
refine integrable_iff_integrableAtFilter_atTop.mpr ⟨ho.integrableAtFilter ?_ hg, hf⟩ exact hf.aestronglyMeasurable.stronglyMeasurableAtFilter
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
573
577
theorem nfp_add_eq_mul_omega {a b} (hba : b ≤ a * omega) : nfp (a + ·) b = a * omega := by
apply le_antisymm (nfp_le_fp (add_isNormal a).monotone hba _) · rw [← nfp_add_zero] exact nfp_monotone (add_isNormal a).monotone (Ordinal.zero_le b) · dsimp; rw [← mul_one_add, one_add_omega]
import Mathlib.Order.ConditionallyCompleteLattice.Basic import Mathlib.Data.Int.LeastGreatest #align_import data.int.conditionally_complete_order from "leanprover-community/mathlib"@"1e05171a5e8cf18d98d9cf7b207540acb044acae" open Int noncomputable section open scoped Classical instance instConditionallyComplet...
Mathlib/Data/Int/ConditionallyCompleteOrder.lean
78
82
theorem csInf_eq_least_of_bdd {s : Set ℤ} [DecidablePred (· ∈ s)] (b : ℤ) (Hb : ∀ z ∈ s, b ≤ z) (Hinh : ∃ z : ℤ, z ∈ s) : sInf s = leastOfBdd b Hb Hinh := by
have : s.Nonempty ∧ BddBelow s := ⟨Hinh, b, Hb⟩ simp only [sInf, this, and_self, dite_true] convert (coe_leastOfBdd_eq Hb (Classical.choose_spec (⟨b, Hb⟩ : BddBelow s)) Hinh).symm
import Mathlib.Analysis.Convex.Slope import Mathlib.Analysis.SpecialFunctions.Pow.Real import Mathlib.Tactic.LinearCombination #align_import analysis.convex.specific_functions.basic from "leanprover-community/mathlib"@"8f9fea08977f7e450770933ee6abb20733b47c92" open Real Set NNReal theorem strictConvexOn_exp : St...
Mathlib/Analysis/Convex/SpecificFunctions/Basic.lean
127
133
theorem one_add_mul_self_le_rpow_one_add {s : ℝ} (hs : -1 ≤ s) {p : ℝ} (hp : 1 ≤ p) : 1 + p * s ≤ (1 + s) ^ p := by
rcases eq_or_lt_of_le hp with (rfl | hp) · simp by_cases hs' : s = 0 · simp [hs'] exact (one_add_mul_self_lt_rpow_one_add hs hs' hp).le
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
537
547
theorem dvd_iff_div_factorization_eq_tsub {d n : ℕ} (hd : d ≠ 0) (hdn : d ≤ n) : d ∣ n ↔ (n / d).factorization = n.factorization - d.factorization := by
refine ⟨factorization_div, ?_⟩ rcases eq_or_lt_of_le hdn with (rfl | hd_lt_n); · simp have h1 : n / d ≠ 0 := fun H => Nat.lt_asymm hd_lt_n ((Nat.div_eq_zero_iff hd.bot_lt).mp H) intro h rw [dvd_iff_le_div_mul n d] by_contra h2 cases' exists_factorization_lt_of_lt (mul_ne_zero h1 hd) (not_le.mp h2) with p...
import Mathlib.Analysis.Convex.Side import Mathlib.Geometry.Euclidean.Angle.Oriented.Rotation import Mathlib.Geometry.Euclidean.Angle.Unoriented.Affine #align_import geometry.euclidean.angle.oriented.affine from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
808
834
theorem _root_.AffineSubspace.SSameSide.oangle_sign_eq {s : AffineSubspace ℝ P} {p₁ p₂ p₃ p₄ : P} (hp₁ : p₁ ∈ s) (hp₂ : p₂ ∈ s) (hp₃p₄ : s.SSameSide p₃ p₄) : (∡ p₁ p₄ p₂).sign = (∡ p₁ p₃ p₂).sign := by
by_cases h : p₁ = p₂; · simp [h] let sp : Set (P × P × P) := (fun p : P => (p₁, p, p₂)) '' {p | s.SSameSide p₃ p} have hc : IsConnected sp := (isConnected_setOf_sSameSide hp₃p₄.2.1 hp₃p₄.nonempty).image _ (continuous_const.prod_mk (Continuous.Prod.mk_left _)).continuousOn have hf : ContinuousOn (fun p : P ...
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
772
774
theorem prod.map_comp_id {X Y Z W : C} (f : X ⟶ Y) (g : Y ⟶ Z) [HasBinaryProduct X W] [HasBinaryProduct Z W] [HasBinaryProduct Y W] : prod.map (f ≫ g) (𝟙 W) = prod.map f (𝟙 W) ≫ prod.map g (𝟙 W) := by
simp
import Mathlib.Data.Set.Function import Mathlib.Logic.Relation import Mathlib.Logic.Pairwise #align_import data.set.pairwise.basic from "leanprover-community/mathlib"@"c4c2ed622f43768eff32608d4a0f8a6cec1c047d" open Function Order Set variable {α β γ ι ι' : Type*} {r p q : α → α → Prop} section Pairwise variabl...
Mathlib/Data/Set/Pairwise/Basic.lean
100
109
theorem Nonempty.pairwise_iff_exists_forall [IsEquiv α r] {s : Set ι} (hs : s.Nonempty) : s.Pairwise (r on f) ↔ ∃ z, ∀ x ∈ s, r (f x) z := by
constructor · rcases hs with ⟨y, hy⟩ refine fun H => ⟨f y, fun x hx => ?_⟩ rcases eq_or_ne x y with (rfl | hne) · apply IsRefl.refl · exact H hx hy hne · rintro ⟨z, hz⟩ x hx y hy _ exact @IsTrans.trans α r _ (f x) z (f y) (hz _ hx) (IsSymm.symm _ _ <| hz _ hy)
import Mathlib.CategoryTheory.Limits.Types import Mathlib.CategoryTheory.IsConnected import Mathlib.CategoryTheory.Limits.Final import Mathlib.CategoryTheory.Conj universe w v u namespace CategoryTheory.Limits.Types variable (C : Type u) [Category.{v} C] def constPUnitFunctor : C ⥤ Type w := (Functor.const C).o...
Mathlib/CategoryTheory/Limits/IsConnected.lean
97
104
theorem isConnected_iff_colimit_constPUnitFunctor_iso_pUnit [HasColimit (constPUnitFunctor.{w} C)] : IsConnected C ↔ Nonempty (colimit (constPUnitFunctor.{w} C) ≅ PUnit) := by
refine ⟨fun _ => ⟨colimitConstPUnitIsoPUnit.{w} C⟩, fun ⟨h⟩ => ?_⟩ have : Nonempty C := nonempty_of_nonempty_colimit <| Nonempty.map h.inv inferInstance refine zigzag_isConnected <| fun c d => ?_ refine zigzag_of_eqvGen_quot_rel _ (constPUnitFunctor C) ⟨c, PUnit.unit⟩ ⟨d, PUnit.unit⟩ ?_ exact colimit_eq <| h...
import Mathlib.Analysis.NormedSpace.Exponential import Mathlib.Analysis.Matrix import Mathlib.LinearAlgebra.Matrix.ZPow import Mathlib.LinearAlgebra.Matrix.Hermitian import Mathlib.LinearAlgebra.Matrix.Symmetric import Mathlib.Topology.UniformSpace.Matrix #align_import analysis.normed_space.matrix_exponential from "l...
Mathlib/Analysis/NormedSpace/MatrixExponential.lean
182
187
theorem exp_neg (A : Matrix m m 𝔸) : exp 𝕂 (-A) = (exp 𝕂 A)⁻¹ := by
rw [nonsing_inv_eq_ring_inverse] letI : SeminormedRing (Matrix m m 𝔸) := Matrix.linftyOpSemiNormedRing letI : NormedRing (Matrix m m 𝔸) := Matrix.linftyOpNormedRing letI : NormedAlgebra 𝕂 (Matrix m m 𝔸) := Matrix.linftyOpNormedAlgebra exact (Ring.inverse_exp _ A).symm
import Mathlib.SetTheory.Ordinal.Arithmetic #align_import set_theory.ordinal.exponential from "leanprover-community/mathlib"@"b67044ba53af18680e1dd246861d9584e968495d" noncomputable section open Function Cardinal Set Equiv Order open scoped Classical open Cardinal Ordinal universe u v w namespace Ordinal in...
Mathlib/SetTheory/Ordinal/Exponential.lean
311
316
theorem lt_opow_succ_log_self {b : Ordinal} (hb : 1 < b) (x : Ordinal) : x < b ^ succ (log b x) := by
rcases eq_or_ne x 0 with (rfl | hx) · apply opow_pos _ (zero_lt_one.trans hb) · rw [succ_log_def hb hx] exact csInf_mem (log_nonempty hb)
import Mathlib.Algebra.BigOperators.Group.List import Mathlib.Data.Vector.Defs import Mathlib.Data.List.Nodup import Mathlib.Data.List.OfFn import Mathlib.Data.List.InsertNth import Mathlib.Control.Applicative import Mathlib.Control.Traversable.Basic #align_import data.vector.basic from "leanprover-community/mathlib"...
Mathlib/Data/Vector/Basic.lean
106
108
theorem head_map {β : Type*} (v : Vector α (n + 1)) (f : α → β) : (v.map f).head = f v.head := by
obtain ⟨a, v', h⟩ := Vector.exists_eq_cons v rw [h, map_cons, head_cons, head_cons]
import Mathlib.Data.Int.ModEq import Mathlib.GroupTheory.QuotientGroup #align_import algebra.modeq from "leanprover-community/mathlib"@"a07d750983b94c530ab69a726862c2ab6802b38c" namespace AddCommGroup variable {α : Type*} section AddCommGroup variable [AddCommGroup α] {p a a₁ a₂ b b₁ b₂ c : α} {n : ℕ} {z : ℤ} ...
Mathlib/Algebra/ModEq.lean
279
279
theorem sub_modEq_zero : a - b ≡ 0 [PMOD p] ↔ a ≡ b [PMOD p] := by
simp [sub_modEq_iff_modEq_add]
import Mathlib.Algebra.Ring.Idempotents import Mathlib.RingTheory.Finiteness import Mathlib.Order.Basic #align_import ring_theory.ideal.idempotent_fg from "leanprover-community/mathlib"@"25cf7631da8ddc2d5f957c388bf5e4b25a77d8dc" namespace Ideal
Mathlib/RingTheory/Ideal/IdempotentFG.lean
20
35
theorem isIdempotentElem_iff_of_fg {R : Type*} [CommRing R] (I : Ideal R) (h : I.FG) : IsIdempotentElem I ↔ ∃ e : R, IsIdempotentElem e ∧ I = R ∙ e := by
constructor · intro e obtain ⟨r, hr, hr'⟩ := Submodule.exists_mem_and_smul_eq_self_of_fg_of_le_smul I I h (by rw [smul_eq_mul] exact e.ge) simp_rw [smul_eq_mul] at hr' refine ⟨r, hr' r hr, antisymm ?_ ((Submodule.span_singleton_le_iff_mem _ _).mpr hr)⟩ intro x hx ...
import Mathlib.Data.Finsupp.Multiset import Mathlib.Order.Bounded import Mathlib.SetTheory.Cardinal.PartENat import Mathlib.SetTheory.Ordinal.Principal import Mathlib.Tactic.Linarith #align_import set_theory.cardinal.ordinal from "leanprover-community/mathlib"@"7c2ce0c2da15516b4e65d0c9e254bb6dc93abd1f" noncomputa...
Mathlib/SetTheory/Cardinal/Ordinal.lean
111
112
theorem alephIdx_le {a b} : alephIdx a ≤ alephIdx b ↔ a ≤ b := by
rw [← not_lt, ← not_lt, alephIdx_lt]
import Mathlib.Algebra.Group.Commute.Defs import Mathlib.Algebra.Group.Hom.Instances import Mathlib.Data.Set.Function import Mathlib.Logic.Pairwise #align_import algebra.group.pi from "leanprover-community/mathlib"@"e4bc74cbaf429d706cb9140902f7ca6c431e75a4" assert_not_exists AddMonoidWithOne assert_not_exists Mono...
Mathlib/Algebra/Group/Pi/Lemmas.lean
350
354
theorem Pi.mulSingle_apply_commute [∀ i, MulOneClass <| f i] (x : ∀ i, f i) (i j : I) : Commute (mulSingle i (x i)) (mulSingle j (x j)) := by
obtain rfl | hij := Decidable.eq_or_ne i j · rfl · exact Pi.mulSingle_commute hij _ _
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
215
217
theorem Right.inv_le_one_iff : a⁻¹ ≤ 1 ↔ 1 ≤ a := by
rw [← mul_le_mul_iff_right a] simp
import Mathlib.Analysis.Calculus.FDeriv.Linear import Mathlib.Analysis.Calculus.FDeriv.Comp #align_import analysis.calculus.fderiv.prod from "leanprover-community/mathlib"@"e354e865255654389cc46e6032160238df2e0f40" open Filter Asymptotics ContinuousLinearMap Set Metric open scoped Classical open Topology NNReal ...
Mathlib/Analysis/Calculus/FDeriv/Prod.lean
427
431
theorem hasFDerivAtFilter_pi' : HasFDerivAtFilter Φ Φ' x L ↔ ∀ i, HasFDerivAtFilter (fun x => Φ x i) ((proj i).comp Φ') x L := by
simp only [hasFDerivAtFilter_iff_isLittleO, ContinuousLinearMap.coe_pi] exact isLittleO_pi
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
83
87
theorem ascPochhammer_map (f : S →+* T) (n : ℕ) : (ascPochhammer S n).map f = ascPochhammer T n := by
induction' n with n ih · simp · simp [ih, ascPochhammer_succ_left, map_comp]
import Mathlib.Order.Lattice #align_import order.min_max from "leanprover-community/mathlib"@"70d50ecfd4900dd6d328da39ab7ebd516abe4025" universe u v variable {α : Type u} {β : Type v} attribute [simp] max_eq_left max_eq_right min_eq_left min_eq_right section variable [LinearOrder α] [LinearOrder β] {f : α → β...
Mathlib/Order/MinMax.lean
271
272
theorem Antitone.map_max (hf : Antitone f) : f (max a b) = min (f a) (f b) := by
rcases le_total a b with h | h <;> simp [h, hf h]
import Mathlib.Data.PFunctor.Multivariate.Basic #align_import data.pfunctor.multivariate.W from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" universe u v namespace MvPFunctor open TypeVec open MvFunctor variable {n : ℕ} (P : MvPFunctor.{u} (n + 1)) inductive WPath : P.last.W → F...
Mathlib/Data/PFunctor/Multivariate/W.lean
310
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theorem wDest'_wMk' {α : TypeVec n} (x : P (α.append1 (P.W α))) : P.wDest' (P.wMk' x) = x := by
cases' x with a f; rw [wMk', wDest'_wMk, split_dropFun_lastFun]
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
103
104
theorem image2_union_left : image2 f (s ∪ s') t = image2 f s t ∪ image2 f s' t := by
simp_rw [← image_prod, union_prod, image_union]
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
239
241
theorem self_distrib_inv {x y z : R} : x ◃⁻¹ y ◃⁻¹ z = (x ◃⁻¹ y) ◃⁻¹ x ◃⁻¹ z := by
rw [← left_cancel (x ◃⁻¹ y), right_inv, ← left_cancel x, right_inv, self_distrib] repeat' rw [right_inv]
import Mathlib.MeasureTheory.Measure.VectorMeasure import Mathlib.MeasureTheory.Function.AEEqOfIntegral #align_import measure_theory.measure.with_density_vector_measure from "leanprover-community/mathlib"@"d1bd9c5df2867c1cb463bc6364446d57bdd9f7f1" noncomputable section open scoped Classical MeasureTheory NNReal ...
Mathlib/MeasureTheory/Measure/WithDensityVectorMeasure.lean
69
76
theorem withDensityᵥ_neg : μ.withDensityᵥ (-f) = -μ.withDensityᵥ f := by
by_cases hf : Integrable f μ · ext1 i hi rw [VectorMeasure.neg_apply, withDensityᵥ_apply hf hi, ← integral_neg, withDensityᵥ_apply hf.neg hi] rfl · rw [withDensityᵥ, withDensityᵥ, dif_neg hf, dif_neg, neg_zero] rwa [integrable_neg_iff]
import Mathlib.NumberTheory.NumberField.Basic import Mathlib.RingTheory.Localization.NormTrace #align_import number_theory.number_field.norm from "leanprover-community/mathlib"@"00f91228655eecdcd3ac97a7fd8dbcb139fe990a" open scoped NumberField open Finset NumberField Algebra FiniteDimensional namespace RingOfIn...
Mathlib/NumberTheory/NumberField/Norm.lean
72
85
theorem isUnit_norm_of_isGalois [IsGalois K L] {x : 𝓞 L} : IsUnit (norm K x) ↔ IsUnit x := by
classical refine ⟨fun hx => ?_, IsUnit.map _⟩ replace hx : IsUnit (algebraMap (𝓞 K) (𝓞 L) <| norm K x) := hx.map (algebraMap (𝓞 K) <| 𝓞 L) refine @isUnit_of_mul_isUnit_right (𝓞 L) _ ⟨(univ \ {AlgEquiv.refl}).prod fun σ : L ≃ₐ[K] L => σ x, prod_mem fun σ _ => x.2.map (σ : L →+* L).toIntAlgHom⟩ _ ...
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring import Mathlib.Algebra.Order.Group.Indicator import Mathlib.Order.LiminfLimsup import Mathlib.Order.Filter.Archimedean import Mathlib.Order.Filter.CountableInter import Mathlib.Topology.Algebra.Group.Basic import Mathlib.Data.Set.La...
Mathlib/Topology/Algebra/Order/LiminfLimsup.lean
568
578
theorem limsup_eq_tendsto_sum_indicator_atTop (R : Type*) [StrictOrderedSemiring R] [Archimedean R] (s : ℕ → Set α) : limsup s atTop = { ω | Tendsto (fun n ↦ ∑ k ∈ Finset.range n, (s (k + 1)).indicator (1 : α → R) ω) atTop atTop } := by
rw [limsup_eq_tendsto_sum_indicator_nat_atTop s] ext ω simp only [Set.mem_setOf_eq] rw [(_ : (fun n ↦ ∑ k ∈ Finset.range n, (s (k + 1)).indicator (1 : α → R) ω) = fun n ↦ ↑(∑ k ∈ Finset.range n, (s (k + 1)).indicator (1 : α → ℕ) ω))] · exact tendsto_natCast_atTop_iff.symm · ext n simp only [Set.ind...
import Mathlib.LinearAlgebra.FiniteDimensional import Mathlib.MeasureTheory.Group.Pointwise import Mathlib.MeasureTheory.Measure.Lebesgue.Basic import Mathlib.MeasureTheory.Measure.Haar.Basic import Mathlib.MeasureTheory.Measure.Doubling import Mathlib.MeasureTheory.Constructions.BorelSpace.Metric #align_import measu...
Mathlib/MeasureTheory/Measure/Lebesgue/EqHaar.lean
142
155
theorem addHaar_eq_zero_of_disjoint_translates_aux {E : Type*} [NormedAddCommGroup E] [NormedSpace ℝ E] [MeasurableSpace E] [BorelSpace E] [FiniteDimensional ℝ E] (μ : Measure E) [IsAddHaarMeasure μ] {s : Set E} (u : ℕ → E) (sb : IsBounded s) (hu : IsBounded (range u)) (hs : Pairwise (Disjoint on fun n => {...
by_contra h apply lt_irrefl ∞ calc ∞ = ∑' _ : ℕ, μ s := (ENNReal.tsum_const_eq_top_of_ne_zero h).symm _ = ∑' n : ℕ, μ ({u n} + s) := by congr 1; ext1 n; simp only [image_add_left, measure_preimage_add, singleton_add] _ = μ (⋃ n, {u n} + s) := Eq.symm <| measure_iUnion hs fun n => by simpa...
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
207
207
theorem log_nonpos_iff (hx : 0 < x) : log x ≤ 0 ↔ x ≤ 1 := by
rw [← not_lt, log_pos_iff hx, not_lt]
import Mathlib.Analysis.Calculus.Deriv.ZPow import Mathlib.Analysis.SpecialFunctions.Sqrt import Mathlib.Analysis.SpecialFunctions.Log.Deriv import Mathlib.Analysis.SpecialFunctions.Trigonometric.Deriv import Mathlib.Analysis.Convex.Deriv #align_import analysis.convex.specific_functions.deriv from "leanprover-communi...
Mathlib/Analysis/Convex/SpecificFunctions/Deriv.lean
115
119
theorem hasDerivAt_sqrt_mul_log {x : ℝ} (hx : x ≠ 0) : HasDerivAt (fun x => √x * log x) ((2 + log x) / (2 * √x)) x := by
convert (hasDerivAt_sqrt hx).mul (hasDerivAt_log hx) using 1 rw [add_div, div_mul_cancel_left₀ two_ne_zero, ← div_eq_mul_inv, sqrt_div_self', add_comm, one_div, one_div, ← div_eq_inv_mul]
import Mathlib.Topology.Separation import Mathlib.Topology.UniformSpace.Basic import Mathlib.Topology.UniformSpace.Cauchy #align_import topology.uniform_space.uniform_convergence from "leanprover-community/mathlib"@"2705404e701abc6b3127da906f40bae062a169c9" noncomputable section open Topology Uniformity Filter S...
Mathlib/Topology/UniformSpace/UniformConvergence.lean
766
775
theorem tendstoLocallyUniformlyOn_iff_filter : TendstoLocallyUniformlyOn F f p s ↔ ∀ x ∈ s, TendstoUniformlyOnFilter F f p (𝓝[s] x) := by
simp only [TendstoUniformlyOnFilter, eventually_prod_iff] constructor · rintro h x hx u hu obtain ⟨s, hs1, hs2⟩ := h u hu x hx exact ⟨_, hs2, _, eventually_of_mem hs1 fun x => id, fun hi y hy => hi y hy⟩ · rintro h u hu x hx obtain ⟨pa, hpa, pb, hpb, h⟩ := h x hx u hu exact ⟨pb, hpb, eventually...
import Mathlib.Logic.Equiv.Defs #align_import data.erased from "leanprover-community/mathlib"@"10b4e499f43088dd3bb7b5796184ad5216648ab1" universe u def Erased (α : Sort u) : Sort max 1 u := Σ's : α → Prop, ∃ a, (fun b => a = b) = s #align erased Erased namespace Erased @[inline] def mk {α} (a : α) : Erased...
Mathlib/Data/Erased.lean
131
131
theorem map_out {α β} {f : α → β} (a : Erased α) : (a.map f).out = f a.out := by
simp [map]
import Mathlib.Combinatorics.SimpleGraph.Subgraph import Mathlib.Data.List.Rotate #align_import combinatorics.simple_graph.connectivity from "leanprover-community/mathlib"@"b99e2d58a5e6861833fa8de11e51a81144258db4" open Function universe u v w namespace SimpleGraph variable {V : Type u} {V' : Type v} {V'' : Typ...
Mathlib/Combinatorics/SimpleGraph/Connectivity.lean
639
642
theorem subset_support_append_right {V : Type u} {G : SimpleGraph V} {u v w : V} (p : G.Walk u v) (q : G.Walk v w) : q.support ⊆ (p.append q).support := by
intro h simp (config := { contextual := true }) only [mem_support_append_iff, or_true_iff, imp_true_iff]
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
167
172
theorem Definable.preimage_comp (f : α → β) {s : Set (α → M)} (h : A.Definable L s) : A.Definable L ((fun g : β → M => g ∘ f) ⁻¹' s) := by
obtain ⟨φ, rfl⟩ := h refine ⟨φ.relabel f, ?_⟩ ext simp only [Set.preimage_setOf_eq, mem_setOf_eq, Formula.realize_relabel]
import Mathlib.Algebra.DirectSum.Module import Mathlib.Algebra.Module.Submodule.Basic #align_import algebra.direct_sum.decomposition from "leanprover-community/mathlib"@"4e861f25ba5ceef42ba0712d8ffeb32f38ad6441" variable {ι R M σ : Type*} open DirectSum namespace DirectSum section AddCommMonoid variable [Deci...
Mathlib/Algebra/DirectSum/Decomposition.lean
127
128
theorem decompose_coe {i : ι} (x : ℳ i) : decompose ℳ (x : M) = DirectSum.of _ i x := by
rw [← decompose_symm_of _, Equiv.apply_symm_apply]
import Mathlib.Probability.Martingale.Convergence import Mathlib.Probability.Martingale.OptionalStopping import Mathlib.Probability.Martingale.Centering #align_import probability.martingale.borel_cantelli from "leanprover-community/mathlib"@"2196ab363eb097c008d4497125e0dde23fb36db2" open Filter open scoped NNRea...
Mathlib/Probability/Martingale/BorelCantelli.lean
270
274
theorem Martingale.ae_not_tendsto_atTop_atBot [IsFiniteMeasure μ] (hf : Martingale f ℱ μ) (hbdd : ∀ᵐ ω ∂μ, ∀ i, |f (i + 1) ω - f i ω| ≤ R) : ∀ᵐ ω ∂μ, ¬Tendsto (fun n => f n ω) atTop atBot := by
filter_upwards [hf.bddAbove_range_iff_bddBelow_range hbdd] with ω hω htop using unbounded_of_tendsto_atBot htop (hω.1 <| bddAbove_range_of_tendsto_atTop_atBot htop)
import Mathlib.Topology.Algebra.GroupWithZero import Mathlib.Topology.Order.OrderClosed #align_import topology.algebra.with_zero_topology from "leanprover-community/mathlib"@"3e0c4d76b6ebe9dfafb67d16f7286d2731ed6064" open Topology Filter TopologicalSpace Filter Set Function namespace WithZeroTopology variable {α...
Mathlib/Topology/Algebra/WithZeroTopology.lean
142
144
theorem isClosed_iff {s : Set Γ₀} : IsClosed s ↔ (0 : Γ₀) ∈ s ∨ ∃ γ, γ ≠ 0 ∧ s ⊆ Ici γ := by
simp only [← isOpen_compl_iff, isOpen_iff, mem_compl_iff, not_not, ← compl_Ici, compl_subset_compl]
import Mathlib.LinearAlgebra.FreeModule.PID import Mathlib.LinearAlgebra.FreeModule.Finite.Basic import Mathlib.LinearAlgebra.BilinearForm.DualLattice import Mathlib.RingTheory.DedekindDomain.Basic import Mathlib.RingTheory.Localization.Module import Mathlib.RingTheory.Trace #align_import ring_theory.dedekind_domain....
Mathlib/RingTheory/DedekindDomain/IntegralClosure.lean
65
83
theorem IsIntegralClosure.isLocalization [Algebra.IsAlgebraic K L] : IsLocalization (Algebra.algebraMapSubmonoid C A⁰) L := by
haveI : IsDomain C := (IsIntegralClosure.equiv A C L (integralClosure A L)).toMulEquiv.isDomain (integralClosure A L) haveI : NoZeroSMulDivisors A L := NoZeroSMulDivisors.trans A K L haveI : NoZeroSMulDivisors A C := IsIntegralClosure.noZeroSMulDivisors A L refine ⟨?_, fun z => ?_, fun {x y} h => ⟨1, ?_⟩⟩ ...
import Mathlib.Analysis.NormedSpace.Basic import Mathlib.Analysis.Normed.Group.Hom import Mathlib.Data.Real.Sqrt import Mathlib.RingTheory.Ideal.QuotientOperations import Mathlib.Topology.MetricSpace.HausdorffDistance #align_import analysis.normed.group.quotient from "leanprover-community/mathlib"@"2196ab363eb097c008...
Mathlib/Analysis/Normed/Group/Quotient.lean
187
190
theorem QuotientAddGroup.norm_lt_iff {S : AddSubgroup M} {x : M ⧸ S} {r : ℝ} : ‖x‖ < r ↔ ∃ m : M, ↑m = x ∧ ‖m‖ < r := by
rw [isGLB_lt_iff (isGLB_quotient_norm _), exists_mem_image] rfl
import Mathlib.Tactic.CategoryTheory.Reassoc #align_import category_theory.isomorphism from "leanprover-community/mathlib"@"8350c34a64b9bc3fc64335df8006bffcadc7baa6" universe v u -- morphism levels before object levels. See note [CategoryTheory universes]. namespace CategoryTheory open Category structure Iso {...
Mathlib/CategoryTheory/Iso.lean
248
250
theorem hom_eq_inv (α : X ≅ Y) (β : Y ≅ X) : α.hom = β.inv ↔ β.hom = α.inv := by
erw [inv_eq_inv α.symm β, eq_comm] rfl
import Mathlib.Data.SetLike.Fintype import Mathlib.Algebra.Divisibility.Prod import Mathlib.RingTheory.Nakayama import Mathlib.RingTheory.SimpleModule import Mathlib.Tactic.RSuffices #align_import ring_theory.artinian from "leanprover-community/mathlib"@"210657c4ea4a4a7b234392f70a3a2a83346dfa90" open Set Filter Po...
Mathlib/RingTheory/Artinian.lean
396
411
theorem isArtinian_of_fg_of_artinian {R M} [Ring R] [AddCommGroup M] [Module R M] (N : Submodule R M) [IsArtinianRing R] (hN : N.FG) : IsArtinian R N := by
let ⟨s, hs⟩ := hN haveI := Classical.decEq M haveI := Classical.decEq R have : ∀ x ∈ s, x ∈ N := fun x hx => hs ▸ Submodule.subset_span hx refine @isArtinian_of_surjective _ ((↑s : Set M) →₀ R) N _ _ _ _ _ ?_ ?_ isArtinian_finsupp · exact Finsupp.total (↑s : Set M) N R (fun i => ⟨i, hs ▸ subset_span i.2⟩) ...
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
300
307
theorem exists_eq_pow_mul_of_isAffineOpen (X : Scheme) (U : Opens X.carrier) (hU : IsAffineOpen U) (f : X.presheaf.obj (op U)) (x : X.presheaf.obj (op <| X.basicOpen f)) : ∃ (n : ℕ) (y : X.presheaf.obj (op U)), y |_ X.basicOpen f = (f |_ X.basicOpen f) ^ n * x := by
have := (hU.isLocalization_basicOpen f).2 obtain ⟨⟨y, _, n, rfl⟩, d⟩ := this x use n, y delta TopCat.Presheaf.restrictOpen TopCat.Presheaf.restrict simpa [mul_comm x] using d.symm
import Batteries.Tactic.Init import Batteries.Tactic.Alias import Batteries.Tactic.Lint.Misc instance {f : α → β} [DecidablePred p] : DecidablePred (p ∘ f) := inferInstanceAs <| DecidablePred fun x => p (f x) @[deprecated] alias proofIrrel := proof_irrel theorem Function.id_def : @id α = fun x => x := rfl al...
.lake/packages/batteries/Batteries/Logic.lean
142
143
theorem congr_eqRec {β : α → Sort _} (f : (x : α) → β x → γ) (h : x = x') (y : β x) : f x' (Eq.rec y h) = f x y := by
cases h; rfl
import Mathlib.Algebra.Group.Hom.Defs import Mathlib.Data.Set.Lattice import Mathlib.Data.SetLike.Basic #align_import group_theory.subsemigroup.basic from "leanprover-community/mathlib"@"feb99064803fd3108e37c18b0f77d0a8344677a3" assert_not_exists MonoidWithZero -- Only needed for notation variable {M : Type*} {N ...
Mathlib/Algebra/Group/Subsemigroup/Basic.lean
283
286
theorem subsingleton_of_subsingleton [Subsingleton (Subsemigroup M)] : Subsingleton M := by
constructor; intro x y have : ∀ a : M, a ∈ (⊥ : Subsemigroup M) := by simp [Subsingleton.elim (⊥ : Subsemigroup M) ⊤] exact absurd (this x) not_mem_bot
import Mathlib.Algebra.Order.Group.Nat import Mathlib.Data.List.Rotate import Mathlib.GroupTheory.Perm.Support #align_import group_theory.perm.list from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" namespace List variable {α β : Type*} section FormPerm variable [DecidableEq α] (l :...
Mathlib/GroupTheory/Perm/List.lean
156
158
theorem formPerm_apply_get_length (x : α) (xs : List α) : formPerm (x :: xs) ((x :: xs).get (Fin.mk xs.length (by simp))) = x := by
rw [get_cons_length, formPerm_apply_getLast]; rfl;
import Mathlib.MeasureTheory.Measure.ProbabilityMeasure import Mathlib.MeasureTheory.Measure.Lebesgue.Basic import Mathlib.MeasureTheory.Integral.Layercake import Mathlib.MeasureTheory.Integral.BoundedContinuousFunction #align_import measure_theory.measure.portmanteau from "leanprover-community/mathlib"@"fd5edc43dc4f...
Mathlib/MeasureTheory/Measure/Portmanteau.lean
172
183
theorem limsup_measure_closed_le_iff_liminf_measure_open_ge {ι : Type*} {L : Filter ι} {μ : Measure Ω} {μs : ι → Measure Ω} [IsProbabilityMeasure μ] [∀ i, IsProbabilityMeasure (μs i)] : (∀ F, IsClosed F → (L.limsup fun i => μs i F) ≤ μ F) ↔ ∀ G, IsOpen G → μ G ≤ L.liminf fun i => μs i G := by
constructor · intro h G G_open exact le_measure_liminf_of_limsup_measure_compl_le G_open.measurableSet (h Gᶜ (isClosed_compl_iff.mpr G_open)) · intro h F F_closed exact limsup_measure_le_of_le_liminf_measure_compl F_closed.measurableSet (h Fᶜ (isOpen_compl_iff.mpr F_closed))
import Mathlib.Algebra.Group.Fin import Mathlib.LinearAlgebra.Matrix.Symmetric #align_import linear_algebra.matrix.circulant from "leanprover-community/mathlib"@"3e068ece210655b7b9a9477c3aff38a492400aa1" variable {α β m n R : Type*} namespace Matrix open Function open Matrix def circulant [Sub n] (v : n → α)...
Mathlib/LinearAlgebra/Matrix/Circulant.lean
166
169
theorem circulant_single_one (α n) [Zero α] [One α] [DecidableEq n] [AddGroup n] : circulant (Pi.single 0 1 : n → α) = (1 : Matrix n n α) := by
ext i j simp [one_apply, Pi.single_apply, sub_eq_zero]
import Mathlib.RingTheory.EisensteinCriterion import Mathlib.RingTheory.Polynomial.ScaleRoots #align_import ring_theory.polynomial.eisenstein.basic from "leanprover-community/mathlib"@"2032a878972d5672e7c27c957e7a6e297b044973" universe u v w z variable {R : Type u} open Ideal Algebra Finset open Polynomial na...
Mathlib/RingTheory/Polynomial/Eisenstein/Basic.lean
128
138
theorem pow_natDegree_le_of_root_of_monic_mem {x : R} (hroot : IsRoot f x) (hmo : f.Monic) : ∀ i, f.natDegree ≤ i → x ^ i ∈ 𝓟 := by
intro i hi obtain ⟨k, hk⟩ := exists_add_of_le hi rw [hk, pow_add] suffices x ^ f.natDegree ∈ 𝓟 by exact mul_mem_right (x ^ k) 𝓟 this rw [IsRoot.def, eval_eq_sum_range, Finset.range_add_one, Finset.sum_insert Finset.not_mem_range_self, Finset.sum_range, hmo.coeff_natDegree, one_mul] at * rw [eq_ne...
import Mathlib.LinearAlgebra.Span import Mathlib.LinearAlgebra.BilinearMap #align_import algebra.module.submodule.bilinear from "leanprover-community/mathlib"@"6010cf523816335f7bae7f8584cb2edaace73940" universe uι u v open Set open Pointwise namespace Submodule variable {ι : Sort uι} {R M N P : Type*} variabl...
Mathlib/Algebra/Module/Submodule/Bilinear.lean
129
132
theorem image2_subset_map₂ (f : M →ₗ[R] N →ₗ[R] P) (p : Submodule R M) (q : Submodule R N) : Set.image2 (fun m n => f m n) (↑p : Set M) (↑q : Set N) ⊆ (↑(map₂ f p q) : Set P) := by
rintro _ ⟨i, hi, j, hj, rfl⟩ exact apply_mem_map₂ _ hi hj
import Mathlib.Analysis.Calculus.MeanValue import Mathlib.MeasureTheory.Integral.DominatedConvergence import Mathlib.MeasureTheory.Integral.SetIntegral import Mathlib.Analysis.NormedSpace.HahnBanach.SeparatingDual #align_import analysis.calculus.parametric_integral from "leanprover-community/mathlib"@"8f9fea08977f7e4...
Mathlib/Analysis/Calculus/ParametricIntegral.lean
75
155
theorem hasFDerivAt_integral_of_dominated_loc_of_lip' {F' : α → H →L[𝕜] E} (ε_pos : 0 < ε) (hF_meas : ∀ x ∈ ball x₀ ε, AEStronglyMeasurable (F x) μ) (hF_int : Integrable (F x₀) μ) (hF'_meas : AEStronglyMeasurable F' μ) (h_lipsch : ∀ᵐ a ∂μ, ∀ x ∈ ball x₀ ε, ‖F x a - F x₀ a‖ ≤ bound a * ‖x - x₀‖) (bound_...
have x₀_in : x₀ ∈ ball x₀ ε := mem_ball_self ε_pos have nneg : ∀ x, 0 ≤ ‖x - x₀‖⁻¹ := fun x ↦ inv_nonneg.mpr (norm_nonneg _) set b : α → ℝ := fun a ↦ |bound a| have b_int : Integrable b μ := bound_integrable.norm have b_nonneg : ∀ a, 0 ≤ b a := fun a ↦ abs_nonneg _ replace h_lipsch : ∀ᵐ a ∂μ, ∀ x ∈ ball x₀...
import Mathlib.MeasureTheory.Function.L1Space import Mathlib.MeasureTheory.Function.SimpleFuncDense #align_import measure_theory.function.simple_func_dense_lp from "leanprover-community/mathlib"@"5a2df4cd59cb31e97a516d4603a14bed5c2f9425" noncomputable section set_option linter.uppercaseLean3 false open Set Func...
Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean
325
337
theorem memℒp_of_finite_measure_preimage (p : ℝ≥0∞) {f : α →ₛ E} (hf : ∀ y, y ≠ 0 → μ (f ⁻¹' {y}) < ∞) : Memℒp f p μ := by
by_cases hp0 : p = 0 · rw [hp0, memℒp_zero_iff_aestronglyMeasurable]; exact f.aestronglyMeasurable by_cases hp_top : p = ∞ · rw [hp_top]; exact memℒp_top f μ refine ⟨f.aestronglyMeasurable, ?_⟩ rw [snorm_eq_snorm' hp0 hp_top, f.snorm'_eq] refine ENNReal.rpow_lt_top_of_nonneg (by simp) (ENNReal.sum_lt_top...
import Mathlib.Algebra.CharZero.Defs import Mathlib.Algebra.Group.Pi.Basic import Mathlib.Algebra.Group.Units import Mathlib.Algebra.GroupWithZero.NeZero import Mathlib.Algebra.Order.Group.Defs import Mathlib.Algebra.Order.GroupWithZero.Unbundled import Mathlib.Algebra.Order.Monoid.Canonical.Defs import Mathlib.Algebr...
Mathlib/Algebra/Order/Ring/Defs.lean
360
366
theorem mul_le_mul_of_nonpos_right (h : b ≤ a) (hc : c ≤ 0) : a * c ≤ b * c := by
obtain ⟨d, hcd⟩ := exists_add_of_le hc refine le_of_add_le_add_right (a := b * d + a * d) ?_ calc _ = b * d := by rw [add_left_comm, ← mul_add, ← hcd, mul_zero, add_zero] _ ≤ a * d := mul_le_mul_of_nonneg_right h <| hcd.trans_le <| add_le_of_nonpos_left hc _ = _ := by rw [← add_assoc, ← mul_add, ← hc...
import Mathlib.LinearAlgebra.Span import Mathlib.RingTheory.Ideal.IsPrimary import Mathlib.RingTheory.Ideal.QuotientOperations import Mathlib.RingTheory.Noetherian #align_import ring_theory.ideal.associated_prime from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" variable {R : Type*} [...
Mathlib/RingTheory/Ideal/AssociatedPrime.lean
74
78
theorem not_isAssociatedPrime_of_subsingleton [Subsingleton M] : ¬IsAssociatedPrime I M := by
rintro ⟨hI, x, hx⟩ apply hI.ne_top rwa [Subsingleton.elim x 0, Submodule.span_singleton_eq_bot.mpr rfl, Submodule.annihilator_bot] at hx
import Mathlib.Probability.Martingale.Basic #align_import probability.martingale.centering from "leanprover-community/mathlib"@"bea6c853b6edbd15e9d0941825abd04d77933ed0" open TopologicalSpace Filter open scoped NNReal ENNReal MeasureTheory ProbabilityTheory namespace MeasureTheory variable {Ω E : Type*} {m0 : ...
Mathlib/Probability/Martingale/Centering.lean
167
171
theorem predictablePart_bdd_difference {R : ℝ≥0} {f : ℕ → Ω → ℝ} (ℱ : Filtration ℕ m0) (hbdd : ∀ᵐ ω ∂μ, ∀ i, |f (i + 1) ω - f i ω| ≤ R) : ∀ᵐ ω ∂μ, ∀ i, |predictablePart f ℱ μ (i + 1) ω - predictablePart f ℱ μ i ω| ≤ R := by
simp_rw [predictablePart, Finset.sum_apply, Finset.sum_range_succ_sub_sum] exact ae_all_iff.2 fun i => ae_bdd_condexp_of_ae_bdd <| ae_all_iff.1 hbdd i
import Mathlib.Analysis.SpecialFunctions.Complex.Circle import Mathlib.Geometry.Euclidean.Angle.Oriented.Basic #align_import geometry.euclidean.angle.oriented.rotation from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" noncomputable section open FiniteDimensional Complex open scoped ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Rotation.lean
198
200
theorem neg_rotation_neg_pi_div_two (x : V) : -o.rotation (-π / 2 : ℝ) x = o.rotation (π / 2 : ℝ) x := by
rw [neg_rotation, ← Real.Angle.coe_add, neg_div, ← sub_eq_add_neg, sub_half]
import Mathlib.Topology.Bases import Mathlib.Order.Filter.CountableInter import Mathlib.Topology.Compactness.SigmaCompact open Set Filter Topology TopologicalSpace universe u v variable {X : Type u} {Y : Type v} {ι : Type*} variable [TopologicalSpace X] [TopologicalSpace Y] {s t : Set X} section Lindelof def I...
Mathlib/Topology/Compactness/Lindelof.lean
223
228
theorem IsLindelof.inter_iInter_nonempty {ι : Type v} (hs : IsLindelof s) (t : ι → Set X) (htc : ∀ i, IsClosed (t i)) (hst : ∀ u : Set ι, u.Countable ∧ (s ∩ ⋂ i ∈ u, t i).Nonempty) : (s ∩ ⋂ i, t i).Nonempty := by
contrapose! hst rcases hs.elim_countable_subfamily_closed t htc hst with ⟨u, ⟨_, husub⟩⟩ exact ⟨u, fun _ ↦ husub⟩
import Mathlib.MeasureTheory.Function.AEEqOfIntegral import Mathlib.MeasureTheory.Function.ConditionalExpectation.AEMeasurable #align_import measure_theory.function.conditional_expectation.unique from "leanprover-community/mathlib"@"d8bbb04e2d2a44596798a9207ceefc0fb236e41e" set_option linter.uppercaseLean3 false ...
Mathlib/MeasureTheory/Function/ConditionalExpectation/Unique.lean
130
169
theorem ae_eq_of_forall_setIntegral_eq_of_sigmaFinite' (hm : m ≤ m0) [SigmaFinite (μ.trim hm)] {f g : α → F'} (hf_int_finite : ∀ s, MeasurableSet[m] s → μ s < ∞ → IntegrableOn f s μ) (hg_int_finite : ∀ s, MeasurableSet[m] s → μ s < ∞ → IntegrableOn g s μ) (hfg_eq : ∀ s : Set α, MeasurableSet[m] s → μ s < ∞ ...
rw [← ae_eq_trim_iff_of_aeStronglyMeasurable' hm hfm hgm] have hf_mk_int_finite : ∀ s, MeasurableSet[m] s → μ.trim hm s < ∞ → @IntegrableOn _ _ m _ (hfm.mk f) s (μ.trim hm) := by intro s hs hμs rw [trim_measurableSet_eq hm hs] at hμs -- Porting note: `rw [IntegrableOn]` fails with -- synthesize...
import Mathlib.MeasureTheory.Measure.Typeclasses import Mathlib.MeasureTheory.Measure.MutuallySingular import Mathlib.MeasureTheory.MeasurableSpace.CountablyGenerated open Function Set open scoped ENNReal Classical noncomputable section variable {α β δ : Type*} [MeasurableSpace α] [MeasurableSpace β] {s : Set α} ...
Mathlib/MeasureTheory/Measure/Dirac.lean
45
49
theorem dirac_apply_of_mem {a : α} (h : a ∈ s) : dirac a s = 1 := by
have : ∀ t : Set α, a ∈ t → t.indicator (1 : α → ℝ≥0∞) a = 1 := fun t ht => indicator_of_mem ht 1 refine le_antisymm (this univ trivial ▸ ?_) (this s h ▸ le_dirac_apply) rw [← dirac_apply' a MeasurableSet.univ] exact measure_mono (subset_univ s)
import Mathlib.Topology.Constructions #align_import topology.continuous_on from "leanprover-community/mathlib"@"d4f691b9e5f94cfc64639973f3544c95f8d5d494" open Set Filter Function Topology Filter variable {α : Type*} {β : Type*} {γ : Type*} {δ : Type*} variable [TopologicalSpace α] @[simp] theorem nhds_bind_nhdsW...
Mathlib/Topology/ContinuousOn.lean
577
579
theorem continuousAt_prod_of_discrete_right [DiscreteTopology β] {f : α × β → γ} {x : α × β} : ContinuousAt f x ↔ ContinuousAt (f ⟨·, x.2⟩) x.1 := by
simp_rw [← continuousWithinAt_univ]; exact continuousWithinAt_prod_of_discrete_right
import Mathlib.SetTheory.Ordinal.Arithmetic namespace OrdinalApprox universe u variable {α : Type u} variable [CompleteLattice α] (f : α →o α) (x : α) open Function fixedPoints Cardinal Order OrderHom set_option linter.unusedVariables false in def lfpApprox (a : Ordinal.{u}) : α := sSup ({ f (lfpApprox b) | ...
Mathlib/SetTheory/Ordinal/FixedPointApproximants.lean
77
85
theorem lfpApprox_monotone : Monotone (lfpApprox f x) := by
unfold Monotone; intros a b h; unfold lfpApprox refine sSup_le_sSup ?h apply sup_le_sup_right simp only [exists_prop, Set.le_eq_subset, Set.setOf_subset_setOf, forall_exists_index, and_imp, forall_apply_eq_imp_iff₂] intros a' h' use a' exact ⟨lt_of_lt_of_le h' h, rfl⟩
import Mathlib.MeasureTheory.Integral.IntegrableOn import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.MeasureTheory.Function.LocallyIntegrable import Mathlib.Topology.MetricSpace.ThickenedIndicator import Mathlib.Topology.ContinuousFunction.Compact import Mathlib.Analysis.NormedSpace.HahnBanach.SeparatingDua...
Mathlib/MeasureTheory/Integral/SetIntegral.lean
621
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theorem norm_setIntegral_le_of_norm_le_const_ae {C : ℝ} (hs : μ s < ∞) (hC : ∀ᵐ x ∂μ.restrict s, ‖f x‖ ≤ C) : ‖∫ x in s, f x ∂μ‖ ≤ C * (μ s).toReal := by
rw [← Measure.restrict_apply_univ] at * haveI : IsFiniteMeasure (μ.restrict s) := ⟨hs⟩ exact norm_integral_le_of_norm_le_const hC
import Mathlib.CategoryTheory.Category.Basic import Mathlib.CategoryTheory.Functor.Basic import Mathlib.CategoryTheory.Groupoid import Mathlib.Tactic.NthRewrite import Mathlib.CategoryTheory.PathCategory import Mathlib.CategoryTheory.Quotient import Mathlib.Combinatorics.Quiver.Symmetric #align_import category_theory...
Mathlib/CategoryTheory/Groupoid/FreeGroupoid.lean
120
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theorem congr_reverse_comp {X Y : Paths <| Quiver.Symmetrify V} (p : X ⟶ Y) : Quot.mk (@Quotient.CompClosure _ _ redStep _ _) (p.reverse ≫ p) = Quot.mk (@Quotient.CompClosure _ _ redStep _ _) (𝟙 Y) := by
nth_rw 2 [← Quiver.Path.reverse_reverse p] apply congr_comp_reverse
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
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138
theorem symmDiff_of_le {a b : α} (h : a ≤ b) : a ∆ b = b \ a := by
rw [symmDiff, sdiff_eq_bot_iff.2 h, bot_sup_eq]
import Mathlib.Algebra.Order.Ring.Defs import Mathlib.Algebra.Group.Int import Mathlib.Data.Nat.Dist import Mathlib.Data.Ordmap.Ordnode import Mathlib.Tactic.Abel import Mathlib.Tactic.Linarith #align_import data.ordmap.ordset from "leanprover-community/mathlib"@"47b51515e69f59bca5cf34ef456e6000fe205a69" variable...
Mathlib/Data/Ordmap/Ordset.lean
812
817
theorem Raised.right {l x₁ x₂ r₁ r₂} (H : Raised (size r₁) (size r₂)) : Raised (size (@node' α l x₁ r₁)) (size (@node' α l x₂ r₂)) := by
rw [node', size_node, size_node]; generalize size r₂ = m at H ⊢ rcases H with (rfl | rfl) · exact Or.inl rfl · exact Or.inr rfl
import Mathlib.LinearAlgebra.Dimension.Finrank import Mathlib.LinearAlgebra.InvariantBasisNumber #align_import linear_algebra.dimension from "leanprover-community/mathlib"@"47a5f8186becdbc826190ced4312f8199f9db6a5" noncomputable section universe u v w w' variable {R : Type u} {M : Type v} [Ring R] [AddCommGroup...
Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean
109
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theorem Basis.le_span'' {ι : Type*} [Fintype ι] (b : Basis ι R M) {w : Set M} [Fintype w] (s : span R w = ⊤) : Fintype.card ι ≤ Fintype.card w := by
-- We construct a surjective linear map `(w → R) →ₗ[R] (ι → R)`, -- by expressing a linear combination in `w` as a linear combination in `ι`. fapply card_le_of_surjective' R · exact b.repr.toLinearMap.comp (Finsupp.total w M R (↑)) · apply Surjective.comp (g := b.repr.toLinearMap) · apply LinearEquiv.sur...
import Mathlib.Analysis.Convex.Side import Mathlib.Geometry.Euclidean.Angle.Oriented.Rotation import Mathlib.Geometry.Euclidean.Angle.Unoriented.Affine #align_import geometry.euclidean.angle.oriented.affine from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
614
617
theorem _root_.Sbtw.oangle_eq_add_pi_left {p₁ p₁' p₂ p₃ : P} (h : Sbtw ℝ p₁ p₂ p₁') (hp₃p₂ : p₃ ≠ p₂) : ∡ p₁ p₂ p₃ = ∡ p₁' p₂ p₃ + π := by
rw [← h.oangle₁₂₃_eq_pi, oangle_add_swap h.left_ne h.right_ne hp₃p₂]
import Mathlib.Analysis.Calculus.FDeriv.Basic import Mathlib.Analysis.NormedSpace.OperatorNorm.NormedSpace #align_import analysis.calculus.deriv.basic from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w noncomputable section open scoped Classical Topology Filter ENNReal ...
Mathlib/Analysis/Calculus/Deriv/Basic.lean
246
249
theorem deriv_zero_of_not_differentiableAt (h : ¬DifferentiableAt 𝕜 f x) : deriv f x = 0 := by
unfold deriv rw [fderiv_zero_of_not_differentiableAt h] simp
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
777
782
theorem dist_div_sin_oangle_left_of_oangle_eq_pi_div_two {p₁ p₂ p₃ : P} (h : ∡ p₁ p₂ p₃ = ↑(π / 2)) : dist p₃ p₂ / Real.Angle.sin (∡ p₃ p₁ p₂) = dist p₁ p₃ := by
have hs : (∡ p₃ p₁ p₂).sign = 1 := by rw [← oangle_rotate_sign, h, Real.Angle.sign_coe_pi_div_two] rw [oangle_eq_angle_of_sign_eq_one hs, angle_comm, Real.Angle.sin_coe, dist_comm p₁ p₃, dist_div_sin_angle_of_angle_eq_pi_div_two (angle_rev_eq_pi_div_two_of_oangle_eq_pi_div_two h) (Or.inl (right_ne_of_oan...
import Mathlib.Algebra.BigOperators.Fin import Mathlib.Algebra.Order.BigOperators.Group.Finset import Mathlib.Data.Finset.Sort import Mathlib.Data.Set.Subsingleton #align_import combinatorics.composition from "leanprover-community/mathlib"@"92ca63f0fb391a9ca5f22d2409a6080e786d99f7" open List variable {n : ℕ} ...
Mathlib/Combinatorics/Enumerative/Composition.lean
489
490
theorem ones_blocksFun (n : ℕ) (i : Fin (ones n).length) : (ones n).blocksFun i = 1 := by
simp only [blocksFun, ones, blocks, i.2, List.get_replicate]
import Mathlib.Algebra.Order.Ring.Int import Mathlib.Data.Nat.Cast.Order import Mathlib.Order.UpperLower.Basic open Set namespace Nat @[simp] theorem range_cast_int : range ((↑) : ℕ → ℤ) = Ici 0 := Subset.antisymm (range_subset_iff.2 Int.ofNat_nonneg) CanLift.prf theorem image_cast_int_Icc (a b : ℕ) : (↑) '' I...
Mathlib/Data/Nat/Cast/SetInterval.lean
40
41
theorem image_cast_int_Iio (a : ℕ) : (↑) '' Iio a = Ico (0 : ℤ) a := by
rw [← Ico_bot, image_cast_int_Ico]; rfl
import Mathlib.Analysis.Asymptotics.AsymptoticEquivalent import Mathlib.Analysis.Normed.Group.Lemmas import Mathlib.Analysis.NormedSpace.AddTorsor import Mathlib.Analysis.NormedSpace.AffineIsometry import Mathlib.Analysis.NormedSpace.OperatorNorm.NormedSpace import Mathlib.Analysis.NormedSpace.RieszLemma import Mathli...
Mathlib/Analysis/NormedSpace/FiniteDimension.lean
223
229
theorem LinearMap.exists_antilipschitzWith [FiniteDimensional 𝕜 E] (f : E →ₗ[𝕜] F) (hf : LinearMap.ker f = ⊥) : ∃ K > 0, AntilipschitzWith K f := by
cases subsingleton_or_nontrivial E · exact ⟨1, zero_lt_one, AntilipschitzWith.of_subsingleton⟩ · rw [LinearMap.ker_eq_bot] at hf let e : E ≃L[𝕜] LinearMap.range f := (LinearEquiv.ofInjective f hf).toContinuousLinearEquiv exact ⟨_, e.nnnorm_symm_pos, e.antilipschitz⟩
import Mathlib.Topology.MetricSpace.PseudoMetric #align_import topology.metric_space.basic from "leanprover-community/mathlib"@"c8f305514e0d47dfaa710f5a52f0d21b588e6328" open Set Filter Bornology open scoped NNReal Uniformity universe u v w variable {α : Type u} {β : Type v} {X ι : Type*} variable [PseudoMetricS...
Mathlib/Topology/MetricSpace/Basic.lean
77
78
theorem dist_ne_zero {x y : γ} : dist x y ≠ 0 ↔ x ≠ y := by
simpa only [not_iff_not] using dist_eq_zero
import Mathlib.FieldTheory.Separable import Mathlib.RingTheory.IntegralDomain import Mathlib.Algebra.CharP.Reduced import Mathlib.Tactic.ApplyFun #align_import field_theory.finite.basic from "leanprover-community/mathlib"@"12a85fac627bea918960da036049d611b1a3ee43" variable {K : Type*} {R : Type*} local notation ...
Mathlib/FieldTheory/Finite/Basic.lean
115
139
theorem card_cast_subgroup_card_ne_zero [Ring K] [NoZeroDivisors K] [Nontrivial K] (G : Subgroup Kˣ) [Fintype G] : (Fintype.card G : K) ≠ 0 := by
let n := Fintype.card G intro nzero have ⟨p, char_p⟩ := CharP.exists K have hd : p ∣ n := (CharP.cast_eq_zero_iff K p n).mp nzero cases CharP.char_is_prime_or_zero K p with | inr pzero => exact (Fintype.card_pos).ne' <| Nat.eq_zero_of_zero_dvd <| pzero ▸ hd | inl pprime => have fact_pprime := Fac...
import Mathlib.Order.Filter.Lift import Mathlib.Topology.Separation import Mathlib.Order.Interval.Set.Monotone #align_import topology.filter from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" open Set Filter TopologicalSpace open Filter Topology variable {ι : Sort*} {α β X Y : Type*}...
Mathlib/Topology/Filter.lean
105
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theorem HasBasis.nhds' {l : Filter α} {p : ι → Prop} {s : ι → Set α} (h : HasBasis l p s) : HasBasis (𝓝 l) p fun i => { l' | s i ∈ l' } := by
simpa only [Iic_principal] using h.nhds
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
633
638
theorem Filter.HasBasis.equicontinuousAt_iff_left {p : κ → Prop} {s : κ → Set X} {F : ι → X → α} {x₀ : X} (hX : (𝓝 x₀).HasBasis p s) : EquicontinuousAt F x₀ ↔ ∀ U ∈ 𝓤 α, ∃ k, p k ∧ ∀ x ∈ s k, ∀ i, (F i x₀, F i x) ∈ U := by
rw [equicontinuousAt_iff_continuousAt, ContinuousAt, hX.tendsto_iff (UniformFun.hasBasis_nhds ι α _)] rfl
import Mathlib.Analysis.SpecialFunctions.ExpDeriv #align_import analysis.ODE.gronwall from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" variable {E : Type*} [NormedAddCommGroup E] [NormedSpace ℝ E] {F : Type*} [NormedAddCommGroup F] [NormedSpace ℝ F] open Metric Set Asymptotics Fil...
Mathlib/Analysis/ODE/Gronwall.lean
207
219
theorem dist_le_of_trajectories_ODE_of_mem (hf : ContinuousOn f (Icc a b)) (hf' : ∀ t ∈ Ico a b, HasDerivWithinAt f (v t (f t)) (Ici t) t) (hfs : ∀ t ∈ Ico a b, f t ∈ s t) (hg : ContinuousOn g (Icc a b)) (hg' : ∀ t ∈ Ico a b, HasDerivWithinAt g (v t (g t)) (Ici t) t) (hgs : ∀ t ∈ Ico a b, g t ∈ s t)...
have f_bound : ∀ t ∈ Ico a b, dist (v t (f t)) (v t (f t)) ≤ 0 := by intros; rw [dist_self] have g_bound : ∀ t ∈ Ico a b, dist (v t (g t)) (v t (g t)) ≤ 0 := by intros; rw [dist_self] intro t ht have := dist_le_of_approx_trajectories_ODE_of_mem hv hf hf' f_bound hfs hg hg' g_bound hgs ha t ht rwa [zero_a...
import Mathlib.Analysis.Normed.Group.Pointwise import Mathlib.Analysis.NormedSpace.Real #align_import analysis.normed_space.pointwise from "leanprover-community/mathlib"@"bc91ed7093bf098d253401e69df601fc33dde156" open Metric Set open Pointwise Topology variable {𝕜 E : Type*} variable [NormedField 𝕜] sectio...
Mathlib/Analysis/NormedSpace/Pointwise.lean
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theorem smul_unitBall_of_pos {r : ℝ} (hr : 0 < r) : r • ball (0 : E) 1 = ball (0 : E) r := by
rw [smul_unitBall hr.ne', Real.norm_of_nonneg hr.le]
import Mathlib.Geometry.Manifold.MFDeriv.Atlas noncomputable section open scoped Manifold open Set section UniqueMDiff variable {𝕜 : Type*} [NontriviallyNormedField 𝕜] {E : Type*} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type*} [TopologicalSpace H] {I : ModelWithCorners 𝕜 E H} {M : Type*} [Topolog...
Mathlib/Geometry/Manifold/MFDeriv/UniqueDifferential.lean
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theorem UniqueMDiffOn.uniqueDiffOn_target_inter (hs : UniqueMDiffOn I s) (x : M) : UniqueDiffOn 𝕜 ((extChartAt I x).target ∩ (extChartAt I x).symm ⁻¹' s) := by
-- this is just a reformulation of `UniqueMDiffOn.uniqueMDiffOn_preimage`, using as `e` -- the local chart at `x`. apply UniqueMDiffOn.uniqueDiffOn rw [← PartialEquiv.image_source_inter_eq', inter_comm, extChartAt_source] exact (hs.inter (chartAt H x).open_source).image_denseRange' (fun y hy ↦ hasMFDeriv...
import Mathlib.Algebra.Order.Group.Basic import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Combinatorics.Enumerative.DoubleCounting import Mathlib.Data.Finset.Pointwise import Mathlib.Tactic.GCongr #align_import combinatorics.additive.pluennecke_ruzsa from "leanprover-community/mathlib"@"4aab2abced69a9e579b1e6dc...
Mathlib/Combinatorics/Additive/PluenneckeRuzsa.lean
92
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theorem mul_pluennecke_petridis (C : Finset α) (hA : ∀ A' ⊆ A, (A * B).card * A'.card ≤ (A' * B).card * A.card) : (A * B * C).card * A.card ≤ (A * B).card * (A * C).card := by
induction' C using Finset.induction_on with x C _ ih · simp set A' := A ∩ (A * C / {x}) with hA' set C' := insert x C with hC' have h₀ : A' * {x} = A * {x} ∩ (A * C) := by rw [hA', inter_mul_singleton, (isUnit_singleton x).div_mul_cancel] have h₁ : A * B * C' = A * B * C ∪ (A * B * {x}) \ (A' * B * {x}...
import Mathlib.RingTheory.Polynomial.Hermite.Basic import Mathlib.Analysis.Calculus.Deriv.Add import Mathlib.Analysis.Calculus.Deriv.Polynomial import Mathlib.Analysis.SpecialFunctions.Exp import Mathlib.Analysis.SpecialFunctions.ExpDeriv #align_import ring_theory.polynomial.hermite.gaussian from "leanprover-communit...
Mathlib/RingTheory/Polynomial/Hermite/Gaussian.lean
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theorem deriv_gaussian_eq_hermite_mul_gaussian (n : ℕ) (x : ℝ) : deriv^[n] (fun y => Real.exp (-(y ^ 2 / 2))) x = (-1 : ℝ) ^ n * aeval x (hermite n) * Real.exp (-(x ^ 2 / 2)) := by
rw [mul_assoc] induction' n with n ih generalizing x · rw [Function.iterate_zero_apply, pow_zero, one_mul, hermite_zero, C_1, map_one, one_mul] · replace ih : deriv^[n] _ = _ := _root_.funext ih have deriv_gaussian : deriv (fun y => Real.exp (-(y ^ 2 / 2))) x = -x * Real.exp (-(x ^ 2 / 2)) := by ...
import Mathlib.Algebra.QuadraticDiscriminant import Mathlib.Analysis.Convex.SpecificFunctions.Deriv import Mathlib.Analysis.SpecialFunctions.Pow.Complex #align_import analysis.special_functions.trigonometric.complex from "leanprover-community/mathlib"@"8f9fea08977f7e450770933ee6abb20733b47c92" noncomputable secti...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean
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theorem cos_eq_one_iff {x : ℂ} : cos x = 1 ↔ ∃ k : ℤ, k * (2 * π) = x := by
rw [← cos_zero, eq_comm, cos_eq_cos_iff] simp [mul_assoc, mul_left_comm, eq_comm]
import Mathlib.Topology.Algebra.Polynomial import Mathlib.Topology.ContinuousFunction.Algebra import Mathlib.Topology.UnitInterval import Mathlib.Algebra.Star.Subalgebra #align_import topology.continuous_function.polynomial from "leanprover-community/mathlib"@"a148d797a1094ab554ad4183a4ad6f130358ef64" variable {R...
Mathlib/Topology/ContinuousFunction/Polynomial.lean
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theorem aeval_continuousMap_apply (g : R[X]) (f : C(α, R)) (x : α) : ((Polynomial.aeval f) g) x = g.eval (f x) := by
refine Polynomial.induction_on' g ?_ ?_ · intro p q hp hq simp [hp, hq] · intro n a simp [Pi.pow_apply]
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 edgeSet_sInf (s : Set G.Subgraph) : (sInf s).edgeSet = (⋂ G' ∈ s, edgeSet G') ∩ G.edgeSet := by
ext e induction e using Sym2.ind simp
import Mathlib.CategoryTheory.NatIso #align_import category_theory.bicategory.basic from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" namespace CategoryTheory universe w v u open Category Iso -- intended to be used with explicit universe parameters @[nolint checkUnivs] class Bicate...
Mathlib/CategoryTheory/Bicategory/Basic.lean
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theorem leftUnitor_naturality {f g : a ⟶ b} (η : f ⟶ g) : 𝟙 a ◁ η ≫ (λ_ g).hom = (λ_ f).hom ≫ η := by
simp
import Mathlib.Analysis.Convex.Side import Mathlib.Geometry.Euclidean.Angle.Oriented.Rotation import Mathlib.Geometry.Euclidean.Angle.Unoriented.Affine #align_import geometry.euclidean.angle.oriented.affine from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
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theorem oangle_sign_eq_zero_iff_collinear {p₁ p₂ p₃ : P} : (∡ p₁ p₂ p₃).sign = 0 ↔ Collinear ℝ ({p₁, p₂, p₃} : Set P) := by
rw [Real.Angle.sign_eq_zero_iff, oangle_eq_zero_or_eq_pi_iff_collinear]