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import Mathlib.Algebra.CharP.Defs import Mathlib.RingTheory.Multiplicity import Mathlib.RingTheory.PowerSeries.Basic #align_import ring_theory.power_series.basic from "leanprover-community/mathlib"@"2d5739b61641ee4e7e53eca5688a08f66f2e6a60" noncomputable section open Polynomial open Finset (antidiagonal mem_anti...
Mathlib/RingTheory/PowerSeries/Order.lean
134
139
theorem order_eq_nat {φ : R⟦X⟧} {n : ℕ} : order φ = n ↔ coeff R n φ ≠ 0 ∧ ∀ i, i < n → coeff R i φ = 0 := by
classical rcases eq_or_ne φ 0 with (rfl | hφ) · simpa [(coeff R _).map_zero] using (PartENat.natCast_ne_top _).symm simp [order, dif_neg hφ, Nat.find_eq_iff]
import Mathlib.Algebra.Polynomial.Eval import Mathlib.LinearAlgebra.Dimension.Constructions #align_import algebra.linear_recurrence from "leanprover-community/mathlib"@"039a089d2a4b93c761b234f3e5f5aeb752bac60f" noncomputable section open Finset open Polynomial structure LinearRecurrence (α : Type*) [CommSemir...
Mathlib/Algebra/LinearRecurrence.lean
92
95
theorem mkSol_eq_init (init : Fin E.order → α) : ∀ n : Fin E.order, E.mkSol init n = init n := by
intro n rw [mkSol] simp only [n.is_lt, dif_pos, Fin.mk_val, Fin.eta]
import Mathlib.CategoryTheory.GlueData import Mathlib.Topology.Category.TopCat.Limits.Pullbacks import Mathlib.Topology.Category.TopCat.Opens import Mathlib.Tactic.Generalize import Mathlib.CategoryTheory.Elementwise #align_import topology.gluing from "leanprover-community/mathlib"@"178a32653e369dce2da68dc6b2694e385d...
Mathlib/Topology/Gluing.lean
488
499
theorem fromOpenSubsetsGlue_injective : Function.Injective (fromOpenSubsetsGlue U) := by
intro x y e obtain ⟨i, ⟨x, hx⟩, rfl⟩ := (ofOpenSubsets U).ι_jointly_surjective x obtain ⟨j, ⟨y, hy⟩, rfl⟩ := (ofOpenSubsets U).ι_jointly_surjective y -- Porting note: now it is `erw`, it was `rw` -- see the porting note on `ι_fromOpenSubsetsGlue` erw [ι_fromOpenSubsetsGlue_apply, ι_fromOpenSubsetsGlue_appl...
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.BigOperators import Mathlib.Algebra.Polynomial.Degree.Lemmas import Mathlib.Algebra.Polynomial.Div #align_import data.polynomial.ring_division from "leanprover-community/mathlib"@"8efcf8022aac8e01df8d302dcebdbc25d6a886c8" noncomputable ...
Mathlib/Algebra/Polynomial/RingDivision.lean
166
169
theorem eq_zero_of_dvd_of_degree_lt {p q : R[X]} (h₁ : p ∣ q) (h₂ : degree q < degree p) : q = 0 := by
by_contra hc exact (lt_iff_not_ge _ _).mp h₂ (degree_le_of_dvd h₁ hc)
import Mathlib.Algebra.ContinuedFractions.Computation.Basic import Mathlib.Algebra.ContinuedFractions.Translations #align_import algebra.continued_fractions.computation.translations from "leanprover-community/mathlib"@"a7e36e48519ab281320c4d192da6a7b348ce40ad" namespace GeneralizedContinuedFraction open Generali...
Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean
209
212
theorem of_terminatedAt_n_iff_succ_nth_intFractPair_stream_eq_none : (of v).TerminatedAt n ↔ IntFractPair.stream v (n + 1) = none := by
rw [of_terminatedAt_iff_intFractPair_seq1_terminatedAt, Stream'.Seq.TerminatedAt, IntFractPair.get?_seq1_eq_succ_get?_stream]
import Mathlib.AlgebraicTopology.SimplexCategory import Mathlib.CategoryTheory.Comma.Arrow import Mathlib.CategoryTheory.Limits.FunctorCategory import Mathlib.CategoryTheory.Opposites #align_import algebraic_topology.simplicial_object from "leanprover-community/mathlib"@"5ed51dc37c6b891b79314ee11a50adc2b1df6fd6" o...
Mathlib/AlgebraicTopology/SimplicialObject.lean
131
134
theorem δ_comp_δ_self {n} {i : Fin (n + 2)} : X.δ (Fin.castSucc i) ≫ X.δ i = X.δ i.succ ≫ X.δ i := by
dsimp [δ] simp only [← X.map_comp, ← op_comp, SimplexCategory.δ_comp_δ_self]
import Mathlib.Algebra.CharP.ExpChar import Mathlib.Algebra.GeomSum import Mathlib.Algebra.MvPolynomial.CommRing import Mathlib.Algebra.MvPolynomial.Equiv import Mathlib.RingTheory.Polynomial.Content import Mathlib.RingTheory.UniqueFactorizationDomain #align_import ring_theory.polynomial.basic from "leanprover-commun...
Mathlib/RingTheory/Polynomial/Basic.lean
233
236
theorem span_of_finite_le_degreeLT {s : Set R[X]} (s_fin : s.Finite) : ∃ n : ℕ, Submodule.span R s ≤ degreeLT R n := by
rcases span_le_degreeLE_of_finite s_fin with ⟨n, _⟩ exact ⟨n + 1, by rwa [degreeLT_succ_eq_degreeLE]⟩
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
200
200
theorem log_nonneg_iff (hx : 0 < x) : 0 ≤ log x ↔ 1 ≤ x := by
rw [← not_lt, log_neg_iff hx, not_lt]
import Mathlib.Algebra.Group.Support import Mathlib.Order.WellFoundedSet #align_import ring_theory.hahn_series from "leanprover-community/mathlib"@"a484a7d0eade4e1268f4fb402859b6686037f965" set_option linter.uppercaseLean3 false open Finset Function open scoped Classical noncomputable section @[ext] structure ...
Mathlib/RingTheory/HahnSeries/Basic.lean
283
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theorem coeff_eq_zero_of_lt_orderTop {x : HahnSeries Γ R} {i : Γ} (hi : i < x.orderTop) : x.coeff i = 0 := by
rcases eq_or_ne x 0 with (rfl | hx) · exact zero_coeff contrapose! hi rw [← mem_support] at hi rw [orderTop_of_ne hx, WithTop.coe_lt_coe] exact Set.IsWF.not_lt_min _ _ hi
import Mathlib.MeasureTheory.PiSystem import Mathlib.Order.OmegaCompletePartialOrder import Mathlib.Topology.Constructions import Mathlib.MeasureTheory.MeasurableSpace.Basic open Set namespace MeasureTheory variable {ι : Type _} {α : ι → Type _} section cylinder def cylinder (s : Finset ι) (S : Set (∀ i : s, α...
Mathlib/MeasureTheory/Constructions/Cylinders.lean
213
215
theorem diff_cylinder_same (s : Finset ι) (S T : Set (∀ i : s, α i)) : cylinder s S \ cylinder s T = cylinder s (S \ T) := by
ext1 f; simp only [mem_diff, mem_cylinder]
import Mathlib.Algebra.MonoidAlgebra.Degree import Mathlib.Algebra.MvPolynomial.Rename import Mathlib.Algebra.Order.BigOperators.Ring.Finset #align_import data.mv_polynomial.variables from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section open Set Function Finsupp Ad...
Mathlib/Algebra/MvPolynomial/Degrees.lean
197
211
theorem degrees_rename (f : σ → τ) (φ : MvPolynomial σ R) : (rename f φ).degrees ⊆ φ.degrees.map f := by
classical intro i rw [mem_degrees, Multiset.mem_map] rintro ⟨d, hd, hi⟩ obtain ⟨x, rfl, hx⟩ := coeff_rename_ne_zero _ _ _ hd simp only [Finsupp.mapDomain, Finsupp.mem_support_iff] at hi rw [sum_apply, Finsupp.sum] at hi contrapose! hi rw [Finset.sum_eq_zero] intro j hj simp only [exists_prop, mem...
import Mathlib.Analysis.Calculus.Deriv.Add #align_import analysis.calculus.local_extr from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v open Filter Set open scoped Topology Classical section Module variable {E : Type u} [NormedAddCommGroup E] [NormedSpace ℝ E] {f : E ...
Mathlib/Analysis/Calculus/LocalExtr/Basic.lean
155
157
theorem IsLocalMinOn.hasFDerivWithinAt_nonneg {s : Set E} (h : IsLocalMinOn f s a) (hf : HasFDerivWithinAt f f' s a) {y} (hy : y ∈ posTangentConeAt s a) : 0 ≤ f' y := by
simpa using h.neg.hasFDerivWithinAt_nonpos hf.neg hy
import Mathlib.Algebra.Order.Ring.Int import Mathlib.Algebra.Ring.Rat #align_import data.rat.order from "leanprover-community/mathlib"@"a59dad53320b73ef180174aae867addd707ef00e" assert_not_exists Field assert_not_exists Finset assert_not_exists Set.Icc assert_not_exists GaloisConnection namespace Rat variable {a...
Mathlib/Algebra/Order/Ring/Rat.lean
50
59
theorem ofScientific_nonneg (m : ℕ) (s : Bool) (e : ℕ) : 0 ≤ Rat.ofScientific m s e := by
rw [Rat.ofScientific] cases s · rw [if_neg (by decide)] refine num_nonneg.mp ?_ rw [num_natCast] exact Int.natCast_nonneg _ · rw [if_pos rfl, normalize_eq_mkRat] exact Rat.mkRat_nonneg (Int.natCast_nonneg _) _
import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Algebra.MonoidAlgebra.Basic import Mathlib.Data.Finset.Sort #align_import data.polynomial.basic from "leanprover-community/mathlib"@"949dc57e616a621462062668c9f39e4e17b64b69" set_option linter.uppercaseLean3 false noncomputable section structure ...
Mathlib/Algebra/Polynomial/Basic.lean
195
199
theorem ofFinsupp_pow (a) (n : ℕ) : (⟨a ^ n⟩ : R[X]) = ⟨a⟩ ^ n := by
change _ = npowRec n _ induction n with | zero => simp [npowRec] | succ n n_ih => simp [npowRec, n_ih, pow_succ]
import Mathlib.Data.Multiset.Nodup import Mathlib.Data.List.NatAntidiagonal #align_import data.multiset.nat_antidiagonal from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" namespace Multiset namespace Nat def antidiagonal (n : ℕ) : Multiset (ℕ × ℕ) := List.Nat.antidiagonal n #align...
Mathlib/Data/Multiset/NatAntidiagonal.lean
36
37
theorem mem_antidiagonal {n : ℕ} {x : ℕ × ℕ} : x ∈ antidiagonal n ↔ x.1 + x.2 = n := by
rw [antidiagonal, mem_coe, List.Nat.mem_antidiagonal]
import Mathlib.CategoryTheory.Adjunction.FullyFaithful import Mathlib.CategoryTheory.Conj import Mathlib.CategoryTheory.Functor.ReflectsIso #align_import category_theory.adjunction.reflective from "leanprover-community/mathlib"@"239d882c4fb58361ee8b3b39fb2091320edef10a" universe v₁ v₂ v₃ u₁ u₂ u₃ noncomputable s...
Mathlib/CategoryTheory/Adjunction/Reflective.lean
165
168
theorem unitCompPartialBijective_natural [Reflective i] (A : C) {B B' : C} (h : B ⟶ B') (hB : B ∈ i.essImage) (hB' : B' ∈ i.essImage) (f : A ⟶ B) : (unitCompPartialBijective A hB') (f ≫ h) = unitCompPartialBijective A hB f ≫ h := by
rw [← Equiv.eq_symm_apply, unitCompPartialBijective_symm_natural A h, Equiv.symm_apply_apply]
import Mathlib.Data.List.Nodup #align_import data.list.duplicate from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" variable {α : Type*} namespace List inductive Duplicate (x : α) : List α → Prop | cons_mem {l : List α} : x ∈ l → Duplicate x (x :: l) | cons_duplicate {y : α} {l ...
Mathlib/Data/List/Duplicate.lean
106
113
theorem Duplicate.mono_sublist {l' : List α} (hx : x ∈+ l) (h : l <+ l') : x ∈+ l' := by
induction' h with l₁ l₂ y _ IH l₁ l₂ y h IH · exact hx · exact (IH hx).duplicate_cons _ · rw [duplicate_cons_iff] at hx ⊢ rcases hx with (⟨rfl, hx⟩ | hx) · simp [h.subset hx] · simp [IH hx]
import Mathlib.Algebra.BigOperators.GroupWithZero.Finset import Mathlib.Data.Finite.Card import Mathlib.GroupTheory.Finiteness import Mathlib.GroupTheory.GroupAction.Quotient #align_import group_theory.index from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" namespace Subgroup open Ca...
Mathlib/GroupTheory/Index.lean
319
321
theorem card_dvd_of_surjective {G H : Type*} [Group G] [Group H] [Fintype G] [Fintype H] (f : G →* H) (hf : Function.Surjective f) : Fintype.card H ∣ Fintype.card G := by
simp only [← Nat.card_eq_fintype_card, nat_card_dvd_of_surjective f hf]
import Mathlib.MeasureTheory.Integral.Lebesgue #align_import measure_theory.measure.giry_monad from "leanprover-community/mathlib"@"56f4cd1ef396e9fd389b5d8371ee9ad91d163625" noncomputable section open scoped Classical open ENNReal open scoped Classical open Set Filter variable {α β : Type*} namespace MeasureT...
Mathlib/MeasureTheory/Measure/GiryMonad.lean
163
167
theorem bind_zero_right (m : Measure α) : bind m (0 : α → Measure β) = 0 := by
ext1 s hs simp only [bind, hs, join_apply, coe_zero, Pi.zero_apply] rw [lintegral_map (measurable_coe hs) measurable_zero] simp only [Pi.zero_apply, coe_zero, lintegral_const, zero_mul]
import Mathlib.Logic.Nonempty import Mathlib.Init.Set import Mathlib.Logic.Basic #align_import logic.function.basic from "leanprover-community/mathlib"@"29cb56a7b35f72758b05a30490e1f10bd62c35c1" open Function universe u v w namespace Function section variable {α β γ : Sort*} {f : α → β} @[reducible, simp] de...
Mathlib/Logic/Function/Basic.lean
749
751
theorem extend_apply' (g : α → γ) (e' : β → γ) (b : β) (hb : ¬∃ a, f a = b) : extend f g e' b = e' b := by
simp [Function.extend_def, hb]
import Mathlib.LinearAlgebra.FreeModule.PID import Mathlib.MeasureTheory.Group.FundamentalDomain import Mathlib.MeasureTheory.Measure.Lebesgue.EqHaar import Mathlib.RingTheory.Localization.Module #align_import algebra.module.zlattice from "leanprover-community/mathlib"@"a3e83f0fa4391c8740f7d773a7a9b74e311ae2a3" n...
Mathlib/Algebra/Module/Zlattice/Basic.lean
145
146
theorem repr_fract_apply (m : E) (i : ι) : b.repr (fract b m) i = Int.fract (b.repr m i) := by
rw [fract, map_sub, Finsupp.coe_sub, Pi.sub_apply, repr_floor_apply, Int.fract]
import Mathlib.Algebra.Module.BigOperators import Mathlib.Data.Fintype.BigOperators import Mathlib.LinearAlgebra.AffineSpace.AffineMap import Mathlib.LinearAlgebra.AffineSpace.AffineSubspace import Mathlib.LinearAlgebra.Finsupp import Mathlib.Tactic.FinCases #align_import linear_algebra.affine_space.combination from ...
Mathlib/LinearAlgebra/AffineSpace/Combination.lean
464
466
theorem affineCombination_eq_linear_combination (s : Finset ι) (p : ι → V) (w : ι → k) (hw : ∑ i ∈ s, w i = 1) : s.affineCombination k p w = ∑ i ∈ s, w i • p i := by
simp [s.affineCombination_eq_weightedVSubOfPoint_vadd_of_sum_eq_one w p hw 0]
import Mathlib.Algebra.Polynomial.Cardinal import Mathlib.RingTheory.Algebraic #align_import algebra.algebraic_card from "leanprover-community/mathlib"@"40494fe75ecbd6d2ec61711baa630cf0a7b7d064" universe u v open Cardinal Polynomial Set open Cardinal Polynomial namespace Algebraic theorem infinite_of_charZero...
Mathlib/Algebra/AlgebraicCard.lean
45
54
theorem cardinal_mk_lift_le_mul : Cardinal.lift.{u} #{ x : A // IsAlgebraic R x } ≤ Cardinal.lift.{v} #R[X] * ℵ₀ := by
rw [← mk_uLift, ← mk_uLift] choose g hg₁ hg₂ using fun x : { x : A | IsAlgebraic R x } => x.coe_prop refine lift_mk_le_lift_mk_mul_of_lift_mk_preimage_le g fun f => ?_ rw [lift_le_aleph0, le_aleph0_iff_set_countable] suffices MapsTo (↑) (g ⁻¹' {f}) (f.rootSet A) from this.countable_of_injOn Subtype.coe_i...
import Mathlib.Algebra.MonoidAlgebra.Degree import Mathlib.Algebra.MvPolynomial.Rename import Mathlib.Algebra.Order.BigOperators.Ring.Finset #align_import data.mv_polynomial.variables from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section open Set Function Finsupp Ad...
Mathlib/Algebra/MvPolynomial/Degrees.lean
219
225
theorem degrees_rename_of_injective {p : MvPolynomial σ R} {f : σ → τ} (h : Function.Injective f) : degrees (rename f p) = (degrees p).map f := by
classical simp only [degrees, Multiset.map_finset_sup p.support Finsupp.toMultiset f h, support_rename_of_injective h, Finset.sup_image] refine Finset.sup_congr rfl fun x _ => ?_ exact (Finsupp.toMultiset_map _ _).symm
import Mathlib.Algebra.Lie.Submodule import Mathlib.Algebra.Lie.OfAssociative import Mathlib.LinearAlgebra.Isomorphisms #align_import algebra.lie.quotient from "leanprover-community/mathlib"@"3d7987cda72abc473c7cdbbb075170e9ac620042" universe u v w w₁ w₂ namespace LieSubmodule variable {R : Type u} {L : Type v}...
Mathlib/Algebra/Lie/Quotient.lean
210
211
theorem map_mk'_eq_bot_le : map (mk' N) N' = ⊥ ↔ N' ≤ N := by
rw [← LieModuleHom.le_ker_iff_map, mk'_ker]
import Mathlib.LinearAlgebra.Matrix.DotProduct import Mathlib.LinearAlgebra.Determinant import Mathlib.LinearAlgebra.Matrix.Diagonal #align_import data.matrix.rank from "leanprover-community/mathlib"@"17219820a8aa8abe85adf5dfde19af1dd1bd8ae7" open Matrix namespace Matrix open FiniteDimensional variable {l m n ...
Mathlib/Data/Matrix/Rank.lean
217
220
theorem ker_mulVecLin_conjTranspose_mul_self (A : Matrix m n R) : LinearMap.ker (Aᴴ * A).mulVecLin = LinearMap.ker (mulVecLin A) := by
ext x simp only [LinearMap.mem_ker, mulVecLin_apply, conjTranspose_mul_self_mulVec_eq_zero]
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
320
326
theorem cos_oangle_sub_right_of_oangle_eq_pi_div_two {x y : V} (h : o.oangle x y = ↑(π / 2)) : Real.Angle.cos (o.oangle y (y - x)) = ‖y‖ / ‖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.cos_coe, InnerProductGeometry.cos_angle_sub_of_inner_eq_zero (o.inner_rev_eq_zero_of_oangle_eq_pi_div_two h)]
import Mathlib.CategoryTheory.Limits.HasLimits import Mathlib.CategoryTheory.Products.Basic import Mathlib.CategoryTheory.Functor.Currying import Mathlib.CategoryTheory.Products.Bifunctor #align_import category_theory.limits.fubini from "leanprover-community/mathlib"@"59382264386afdbaf1727e617f5fdda511992eb9" uni...
Mathlib/CategoryTheory/Limits/Fubini.lean
423
429
theorem colimitFlipCompColimIsoColimitCompColim_ι_ι_inv (k) (j) : colimit.ι (F.obj j) k ≫ colimit.ι (F ⋙ colim) j ≫ (colimitFlipCompColimIsoColimitCompColim F).inv = (colimit.ι _ j ≫ colimit.ι (F.flip ⋙ colim) k : _ ⟶ colimit (F.flip ⋙ colim)) := by
dsimp [colimitFlipCompColimIsoColimitCompColim] slice_lhs 1 3 => simp only [] simp
import Mathlib.MeasureTheory.Function.LpSeminorm.Basic import Mathlib.MeasureTheory.Integral.MeanInequalities #align_import measure_theory.function.lp_seminorm from "leanprover-community/mathlib"@"c4015acc0a223449d44061e27ddac1835a3852b9" open Filter open scoped ENNReal Topology namespace MeasureTheory variable ...
Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean
140
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theorem snorm_sub_le' {f g : α → E} (hf : AEStronglyMeasurable f μ) (hg : AEStronglyMeasurable g μ) (p : ℝ≥0∞) : snorm (f - g) p μ ≤ LpAddConst p * (snorm f p μ + snorm g p μ) := by
simpa only [sub_eq_add_neg, snorm_neg] using snorm_add_le' hf hg.neg p
import Mathlib.Combinatorics.Quiver.Basic import Mathlib.Combinatorics.Quiver.Path #align_import combinatorics.quiver.cast from "leanprover-community/mathlib"@"fc2ed6f838ce7c9b7c7171e58d78eaf7b438fb0e" universe v v₁ v₂ u u₁ u₂ variable {U : Type*} [Quiver.{u + 1} U] namespace Quiver def Hom.cast {u v u' v...
Mathlib/Combinatorics/Quiver/Cast.lean
63
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theorem Hom.cast_eq_iff_heq {u v u' v' : U} (hu : u = u') (hv : v = v') (e : u ⟶ v) (e' : u' ⟶ v') : e.cast hu hv = e' ↔ HEq e e' := by
rw [Hom.cast_eq_cast] exact _root_.cast_eq_iff_heq
import Mathlib.Topology.Algebra.Ring.Basic import Mathlib.Topology.Algebra.MulAction import Mathlib.Topology.Algebra.UniformGroup import Mathlib.Topology.ContinuousFunction.Basic import Mathlib.Topology.UniformSpace.UniformEmbedding import Mathlib.Algebra.Algebra.Defs import Mathlib.LinearAlgebra.Projection import Mat...
Mathlib/Topology/Algebra/Module/Basic.lean
61
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theorem Submodule.eq_top_of_nonempty_interior' [NeBot (𝓝[{ x : R | IsUnit x }] 0)] (s : Submodule R M) (hs : (interior (s : Set M)).Nonempty) : s = ⊤ := by
rcases hs with ⟨y, hy⟩ refine Submodule.eq_top_iff'.2 fun x => ?_ rw [mem_interior_iff_mem_nhds] at hy have : Tendsto (fun c : R => y + c • x) (𝓝[{ x : R | IsUnit x }] 0) (𝓝 (y + (0 : R) • x)) := tendsto_const_nhds.add ((tendsto_nhdsWithin_of_tendsto_nhds tendsto_id).smul tendsto_const_nhds) rw [zero_s...
import Mathlib.Algebra.MonoidAlgebra.Support import Mathlib.Algebra.Polynomial.Basic import Mathlib.Algebra.Regular.Basic import Mathlib.Data.Nat.Choose.Sum #align_import data.polynomial.coeff from "leanprover-community/mathlib"@"2651125b48fc5c170ab1111afd0817c903b1fc6c" set_option linter.uppercaseLean3 false no...
Mathlib/Algebra/Polynomial/Coeff.lean
233
240
theorem support_trinomial {k m n : ℕ} (hkm : k < m) (hmn : m < n) {x y z : R} (hx : x ≠ 0) (hy : y ≠ 0) (hz : z ≠ 0) : support (C x * X ^ k + C y * X ^ m + C z * X ^ n) = {k, m, n} := by
apply subset_antisymm (support_trinomial' k m n x y z) simp_rw [insert_subset_iff, singleton_subset_iff, mem_support_iff, coeff_add, coeff_C_mul, coeff_X_pow_self, mul_one, coeff_X_pow, if_neg hkm.ne, if_neg hkm.ne', if_neg hmn.ne, if_neg hmn.ne', if_neg (hkm.trans hmn).ne, if_neg (hkm.trans hmn).ne', mul_...
import Mathlib.MeasureTheory.Measure.Regular import Mathlib.Topology.Semicontinuous import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.Topology.Instances.EReal #align_import measure_theory.integral.vitali_caratheodory from "leanprover-community/mathlib"@"57ac39bd365c2f80589a700f9fbb664d3a1a30c2" open sc...
Mathlib/MeasureTheory/Integral/VitaliCaratheodory.lean
231
260
theorem exists_lt_lowerSemicontinuous_lintegral_ge_of_aemeasurable [SigmaFinite μ] (f : α → ℝ≥0) (fmeas : AEMeasurable f μ) {ε : ℝ≥0∞} (ε0 : ε ≠ 0) : ∃ g : α → ℝ≥0∞, (∀ x, (f x : ℝ≥0∞) < g x) ∧ LowerSemicontinuous g ∧ (∫⁻ x, g x ∂μ) ≤ (∫⁻ x, f x ∂μ) + ε := by
have : ε / 2 ≠ 0 := (ENNReal.half_pos ε0).ne' rcases exists_lt_lowerSemicontinuous_lintegral_ge μ (fmeas.mk f) fmeas.measurable_mk this with ⟨g0, f_lt_g0, g0_cont, g0_int⟩ rcases exists_measurable_superset_of_null fmeas.ae_eq_mk with ⟨s, hs, smeas, μs⟩ rcases exists_le_lowerSemicontinuous_lintegral_ge μ (s...
import Mathlib.Algebra.Module.Submodule.Map #align_import linear_algebra.basic from "leanprover-community/mathlib"@"9d684a893c52e1d6692a504a118bfccbae04feeb" open Function open Pointwise variable {R : Type*} {R₁ : Type*} {R₂ : Type*} {R₃ : Type*} variable {K : Type*} variable {M : Type*} {M₁ : Type*} {M₂ : Type*...
Mathlib/Algebra/Module/Submodule/Ker.lean
107
109
theorem disjoint_ker {f : F} {p : Submodule R M} : Disjoint p (ker f) ↔ ∀ x ∈ p, f x = 0 → x = 0 := by
simp [disjoint_def]
import Mathlib.Data.Fintype.Option import Mathlib.Data.Fintype.Prod import Mathlib.Data.Fintype.Pi import Mathlib.Data.Vector.Basic import Mathlib.Data.PFun import Mathlib.Logic.Function.Iterate import Mathlib.Order.Basic import Mathlib.Tactic.ApplyFun #align_import computability.turing_machine from "leanprover-commu...
Mathlib/Computability/TuringMachine.lean
435
437
theorem proj_map_nth {ι : Type*} {Γ : ι → Type*} [∀ i, Inhabited (Γ i)] (i : ι) (L n) : (ListBlank.map (@proj ι Γ _ i) L).nth n = L.nth n i := by
rw [ListBlank.nth_map]; rfl
import Mathlib.Analysis.Normed.Group.Hom import Mathlib.Analysis.Normed.Group.Completion #align_import analysis.normed.group.hom_completion from "leanprover-community/mathlib"@"17ef379e997badd73e5eabb4d38f11919ab3c4b3" noncomputable section open Set NormedAddGroupHom UniformSpace section Completion variable {G...
Mathlib/Analysis/Normed/Group/HomCompletion.lean
171
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theorem NormedAddGroupHom.ker_completion {f : NormedAddGroupHom G H} {C : ℝ} (h : f.SurjectiveOnWith f.range C) : (f.completion.ker : Set <| Completion G) = closure (toCompl.comp <| incl f.ker).range := by
refine le_antisymm ?_ (closure_minimal f.ker_le_ker_completion f.completion.isClosed_ker) rintro hatg (hatg_in : f.completion hatg = 0) rw [SeminormedAddCommGroup.mem_closure_iff] intro ε ε_pos rcases h.exists_pos with ⟨C', C'_pos, hC'⟩ rcases exists_pos_mul_lt ε_pos (1 + C' * ‖f‖) with ⟨δ, δ_pos, hδ⟩ ob...
import Mathlib.Data.Matrix.Invertible import Mathlib.LinearAlgebra.Matrix.NonsingularInverse import Mathlib.LinearAlgebra.Matrix.PosDef #align_import linear_algebra.matrix.schur_complement from "leanprover-community/mathlib"@"a176cb1219e300e85793d44583dede42377b51af" variable {l m n α : Type*} namespace Matrix ...
Mathlib/LinearAlgebra/Matrix/SchurComplement.lean
202
215
theorem inv_fromBlocks_zero₂₁_of_isUnit_iff (A : Matrix m m α) (B : Matrix m n α) (D : Matrix n n α) (hAD : IsUnit A ↔ IsUnit D) : (fromBlocks A B 0 D)⁻¹ = fromBlocks A⁻¹ (-(A⁻¹ * B * D⁻¹)) 0 D⁻¹ := by
by_cases hA : IsUnit A · have hD := hAD.mp hA cases hA.nonempty_invertible cases hD.nonempty_invertible letI := fromBlocksZero₂₁Invertible A B D simp_rw [← invOf_eq_nonsing_inv, invOf_fromBlocks_zero₂₁_eq] · have hD := hAD.not.mp hA have : ¬IsUnit (fromBlocks A B 0 D) := isUnit_fromBloc...
import Mathlib.Algebra.Homology.ExactSequence import Mathlib.CategoryTheory.Abelian.Refinements #align_import category_theory.abelian.diagram_lemmas.four from "leanprover-community/mathlib"@"d34cbcf6c94953e965448c933cd9cc485115ebbd" namespace CategoryTheory open Category Limits Preadditive namespace Abelian va...
Mathlib/CategoryTheory/Abelian/DiagramLemmas/Four.lean
62
83
theorem mono_of_epi_of_mono_of_mono' (hR₁ : R₁.map' 0 2 = 0) (hR₁' : (mk₂ (R₁.map' 1 2) (R₁.map' 2 3)).Exact) (hR₂ : (mk₂ (R₂.map' 0 1) (R₂.map' 1 2)).Exact) (h₀ : Epi (app' φ 0)) (h₁ : Mono (app' φ 1)) (h₃ : Mono (app' φ 3)) : Mono (app' φ 2) := by
apply mono_of_cancel_zero intro A f₂ h₁ have h₂ : f₂ ≫ R₁.map' 2 3 = 0 := by rw [← cancel_mono (app' φ 3 _), assoc, NatTrans.naturality, reassoc_of% h₁, zero_comp, zero_comp] obtain ⟨A₁, π₁, _, f₁, hf₁⟩ := (hR₁'.exact 0).exact_up_to_refinements f₂ h₂ dsimp at hf₁ have h₃ : (f₁ ≫ app' φ 1) ≫ R₂.ma...
import Mathlib.LinearAlgebra.Contraction import Mathlib.LinearAlgebra.Matrix.Charpoly.Coeff #align_import linear_algebra.trace from "leanprover-community/mathlib"@"4cf7ca0e69e048b006674cf4499e5c7d296a89e0" noncomputable section universe u v w namespace LinearMap open Matrix open FiniteDimensional open Tensor...
Mathlib/LinearAlgebra/Trace.lean
278
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theorem trace_comp_comm' (f : M →ₗ[R] N) (g : N →ₗ[R] M) : trace R M (g ∘ₗ f) = trace R N (f ∘ₗ g) := by
have h := ext_iff.1 (ext_iff.1 (trace_comp_comm R M N) g) f simp only [llcomp_apply', compr₂_apply, flip_apply] at h exact h
import Mathlib.MeasureTheory.Measure.MeasureSpaceDef #align_import measure_theory.measure.ae_disjoint from "leanprover-community/mathlib"@"bc7d81beddb3d6c66f71449c5bc76c38cb77cf9e" open Set Function namespace MeasureTheory variable {ι α : Type*} {m : MeasurableSpace α} (μ : Measure α) def AEDisjoint (s t : Se...
Mathlib/MeasureTheory/Measure/AEDisjoint.lean
100
102
theorem iUnion_right_iff [Countable ι] {t : ι → Set α} : AEDisjoint μ s (⋃ i, t i) ↔ ∀ i, AEDisjoint μ s (t i) := by
simp only [AEDisjoint, inter_iUnion, measure_iUnion_null_iff]
import Mathlib.Data.ENNReal.Real import Mathlib.Order.Interval.Finset.Nat import Mathlib.Topology.UniformSpace.Pi import Mathlib.Topology.UniformSpace.UniformConvergence import Mathlib.Topology.UniformSpace.UniformEmbedding #align_import topology.metric_space.emetric_space from "leanprover-community/mathlib"@"c8f3055...
Mathlib/Topology/EMetricSpace/Basic.lean
118
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theorem edist_congr_right {x y z : α} (h : edist x y = 0) : edist x z = edist y z := by
apply le_antisymm · rw [← zero_add (edist y z), ← h] apply edist_triangle · rw [edist_comm] at h rw [← zero_add (edist x z), ← h] apply edist_triangle
import Mathlib.LinearAlgebra.GeneralLinearGroup import Mathlib.LinearAlgebra.Matrix.ToLin import Mathlib.LinearAlgebra.Matrix.NonsingularInverse import Mathlib.Algebra.Star.Unitary #align_import linear_algebra.unitary_group from "leanprover-community/mathlib"@"2705404e701abc6b3127da906f40bae062a169c9" universe u ...
Mathlib/LinearAlgebra/UnitaryGroup.lean
66
68
theorem mem_unitaryGroup_iff : A ∈ Matrix.unitaryGroup n α ↔ A * star A = 1 := by
refine ⟨And.right, fun hA => ⟨?_, hA⟩⟩ simpa only [mul_eq_one_comm] using hA
import Mathlib.Init.Function #align_import data.option.n_ary from "leanprover-community/mathlib"@"995b47e555f1b6297c7cf16855f1023e355219fb" universe u open Function namespace Option variable {α β γ δ : Type*} {f : α → β → γ} {a : Option α} {b : Option β} {c : Option γ} def map₂ (f : α → β → γ) (a : Option α) ...
Mathlib/Data/Option/NAry.lean
170
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theorem map₂_map_left_comm {f : α' → β → γ} {g : α → α'} {f' : α → β → δ} {g' : δ → γ} (h_left_comm : ∀ a b, f (g a) b = g' (f' a b)) : map₂ f (a.map g) b = (map₂ f' a b).map g' := by
cases a <;> cases b <;> simp [h_left_comm]
import Mathlib.Analysis.SpecialFunctions.Pow.Real import Mathlib.MeasureTheory.Function.Egorov import Mathlib.MeasureTheory.Function.LpSpace #align_import measure_theory.function.convergence_in_measure from "leanprover-community/mathlib"@"0b9eaaa7686280fad8cce467f5c3c57ee6ce77f8" open TopologicalSpace Filter ope...
Mathlib/MeasureTheory/Function/ConvergenceInMeasure.lean
107
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theorem tendstoInMeasure_of_tendsto_ae_of_stronglyMeasurable [IsFiniteMeasure μ] (hf : ∀ n, StronglyMeasurable (f n)) (hg : StronglyMeasurable g) (hfg : ∀ᵐ x ∂μ, Tendsto (fun n => f n x) atTop (𝓝 (g x))) : TendstoInMeasure μ f atTop g := by
refine fun ε hε => ENNReal.tendsto_atTop_zero.mpr fun δ hδ => ?_ by_cases hδi : δ = ∞ · simp only [hδi, imp_true_iff, le_top, exists_const] lift δ to ℝ≥0 using hδi rw [gt_iff_lt, ENNReal.coe_pos, ← NNReal.coe_pos] at hδ obtain ⟨t, _, ht, hunif⟩ := tendstoUniformlyOn_of_ae_tendsto' hf hg hfg hδ rw [ENNRea...
import Mathlib.Data.PFunctor.Univariate.M #align_import data.qpf.univariate.basic from "leanprover-community/mathlib"@"14b69e9f3c16630440a2cbd46f1ddad0d561dee7" universe u class QPF (F : Type u → Type u) [Functor F] where P : PFunctor.{u} abs : ∀ {α}, P α → F α repr : ∀ {α}, F α → P α abs_repr : ∀ {α} (...
Mathlib/Data/QPF/Univariate/Basic.lean
348
357
theorem Fix.ind (p : Fix F → Prop) (h : ∀ x : F (Fix F), Liftp p x → p (Fix.mk x)) : ∀ x, p x := by
apply Quot.ind intro x induction' x with a f ih change p ⟦⟨a, f⟩⟧ rw [← Fix.ind_aux a f] apply h rw [liftp_iff] refine ⟨_, _, rfl, ?_⟩ convert ih
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
154
156
theorem mem_idealOfSet_compl_singleton (x : X) (f : C(X, R)) : f ∈ idealOfSet R ({x}ᶜ : Set X) ↔ f x = 0 := by
simp only [mem_idealOfSet, compl_compl, Set.mem_singleton_iff, forall_eq]
import Mathlib.Data.Fintype.Option import Mathlib.Data.Fintype.Prod import Mathlib.Data.Fintype.Pi import Mathlib.Data.Vector.Basic import Mathlib.Data.PFun import Mathlib.Logic.Function.Iterate import Mathlib.Order.Basic import Mathlib.Tactic.ApplyFun #align_import computability.turing_machine from "leanprover-commu...
Mathlib/Computability/TuringMachine.lean
397
400
theorem ListBlank.head_map {Γ Γ'} [Inhabited Γ] [Inhabited Γ'] (f : PointedMap Γ Γ') (l : ListBlank Γ) : (l.map f).head = f l.head := by
conv => lhs; rw [← ListBlank.cons_head_tail l] exact Quotient.inductionOn' l fun a ↦ rfl
import Mathlib.Analysis.InnerProductSpace.TwoDim import Mathlib.Geometry.Euclidean.Angle.Unoriented.Basic #align_import geometry.euclidean.angle.oriented.basic from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" noncomputable section open FiniteDimensional Complex open scoped Real Rea...
Mathlib/Geometry/Euclidean/Angle/Oriented/Basic.lean
306
308
theorem oangle_smul_left_of_neg (x y : V) {r : ℝ} (hr : r < 0) : o.oangle (r • x) y = o.oangle (-x) y := by
rw [← neg_neg r, neg_smul, ← smul_neg, o.oangle_smul_left_of_pos _ _ (neg_pos_of_neg hr)]
import Mathlib.Algebra.GroupPower.IterateHom import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Order.Archimedean import Mathlib.Algebra.Order.Group.Instances import Mathlib.GroupTheory.GroupAction.Pi open Function Set structure AddConstMap (G H : Type*) [Add G] [Add H] (a : G) (b : H) where protected...
Mathlib/Algebra/AddConstMap/Basic.lean
191
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theorem map_zsmul_const [AddGroup G] [AddGroup H] [AddConstMapClass F G H a b] (f : F) (n : ℤ) : f (n • a) = f 0 + n • b := by
simpa using map_add_zsmul f 0 n
import Mathlib.Analysis.InnerProductSpace.Calculus import Mathlib.Analysis.InnerProductSpace.PiL2 #align_import analysis.inner_product_space.euclidean_dist from "leanprover-community/mathlib"@"9425b6f8220e53b059f5a4904786c3c4b50fc057" open scoped Topology open Set variable {E : Type*} [AddCommGroup E] [Topologi...
Mathlib/Analysis/InnerProductSpace/EuclideanDist.lean
117
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theorem nhds_basis_ball {x : E} : (𝓝 x).HasBasis (fun r : ℝ => 0 < r) (ball x) := by
rw [toEuclidean.toHomeomorph.nhds_eq_comap x] exact Metric.nhds_basis_ball.comap _
import Mathlib.Analysis.Normed.Group.Basic import Mathlib.LinearAlgebra.AffineSpace.AffineSubspace import Mathlib.LinearAlgebra.AffineSpace.Midpoint #align_import analysis.normed.group.add_torsor from "leanprover-community/mathlib"@"837f72de63ad6cd96519cde5f1ffd5ed8d280ad0" noncomputable section open NNReal Topo...
Mathlib/Analysis/Normed/Group/AddTorsor.lean
190
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theorem edist_vadd_vadd_le (v v' : V) (p p' : P) : edist (v +ᵥ p) (v' +ᵥ p') ≤ edist v v' + edist p p' := by
simp only [edist_nndist] norm_cast -- Porting note: was apply_mod_cast apply dist_vadd_vadd_le
import Mathlib.Algebra.Lie.CartanSubalgebra import Mathlib.Algebra.Lie.Weights.Basic suppress_compilation open Set variable {R L : Type*} [CommRing R] [LieRing L] [LieAlgebra R L] (H : LieSubalgebra R L) [LieAlgebra.IsNilpotent R H] {M : Type*} [AddCommGroup M] [Module R M] [LieRingModule L M] [LieModule R L ...
Mathlib/Algebra/Lie/Weights/Cartan.lean
239
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theorem is_cartan_of_zeroRootSubalgebra_eq (h : zeroRootSubalgebra R L H = H) : H.IsCartanSubalgebra := { nilpotent := inferInstance self_normalizing := by
rw [← h]; exact zeroRootSubalgebra_normalizer_eq_self R L H }
import Mathlib.Algebra.Group.Defs import Mathlib.Algebra.GroupWithZero.Defs import Mathlib.Data.Int.Cast.Defs import Mathlib.Tactic.Spread import Mathlib.Util.AssertExists #align_import algebra.ring.defs from "leanprover-community/mathlib"@"76de8ae01554c3b37d66544866659ff174e66e1f" universe u v w x variable {α : ...
Mathlib/Algebra/Ring/Defs.lean
156
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theorem add_one_mul [RightDistribClass α] (a b : α) : (a + 1) * b = a * b + b := by
rw [add_mul, one_mul]
import Mathlib.Order.Interval.Set.Image import Mathlib.Order.CompleteLatticeIntervals import Mathlib.Topology.Order.DenselyOrdered import Mathlib.Topology.Order.Monotone #align_import topology.algebra.order.intermediate_value from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" open Filt...
Mathlib/Topology/Order/IntermediateValue.lean
312
321
theorem setOf_isPreconnected_subset_of_ordered : { s : Set α | IsPreconnected s } ⊆ -- bounded intervals (range (uncurry Icc) ∪ range (uncurry Ico) ∪ range (uncurry Ioc) ∪ range (uncurry Ioo)) ∪ -- unbounded intervals and `univ` (range Ici ∪ range Ioi ∪ range Iic ∪ range Iio ∪ {univ, ∅}) := ...
intro s hs rcases hs.mem_intervals with (hs | hs | hs | hs | hs | hs | hs | hs | hs | hs) <;> rw [hs] <;> simp only [union_insert, union_singleton, mem_insert_iff, mem_union, mem_range, Prod.exists, uncurry_apply_pair, exists_apply_eq_apply, true_or, or_true, exists_apply_eq_apply2]
import Mathlib.Data.Set.Lattice import Mathlib.Order.Directed #align_import data.set.Union_lift from "leanprover-community/mathlib"@"5a4ea8453f128345f73cc656e80a49de2a54f481" variable {α : Type*} {ι β : Sort _} namespace Set section UnionLift @[nolint unusedArguments] noncomputable def iUnionLift (S : ι → Set...
Mathlib/Data/Set/UnionLift.lean
79
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theorem preimage_iUnionLift (t : Set β) : iUnionLift S f hf T hT ⁻¹' t = inclusion hT ⁻¹' (⋃ i, inclusion (subset_iUnion S i) '' (f i ⁻¹' t)) := by
ext x simp only [mem_preimage, mem_iUnion, mem_image] constructor · rcases mem_iUnion.1 (hT x.prop) with ⟨i, hi⟩ refine fun h => ⟨i, ⟨x, hi⟩, ?_, rfl⟩ rwa [iUnionLift_of_mem x hi] at h · rintro ⟨i, ⟨y, hi⟩, h, hxy⟩ obtain rfl : y = x := congr_arg Subtype.val hxy rwa [iUnionLift_of_mem x hi]
import Mathlib.Algebra.MvPolynomial.Basic import Mathlib.RingTheory.Polynomial.Basic import Mathlib.RingTheory.PrincipalIdealDomain #align_import ring_theory.adjoin.fg from "leanprover-community/mathlib"@"c4658a649d216f57e99621708b09dcb3dcccbd23" universe u v w open Subsemiring Ring Submodule open Pointwise na...
Mathlib/RingTheory/Adjoin/FG.lean
170
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theorem induction_on_adjoin [IsNoetherian R A] (P : Subalgebra R A → Prop) (base : P ⊥) (ih : ∀ (S : Subalgebra R A) (x : A), P S → P (Algebra.adjoin R (insert x S))) (S : Subalgebra R A) : P S := by
classical obtain ⟨t, rfl⟩ := S.fg_of_noetherian refine Finset.induction_on t ?_ ?_ · simpa using base intro x t _ h rw [Finset.coe_insert] simpa only [Algebra.adjoin_insert_adjoin] using ih _ x h
import Mathlib.SetTheory.Ordinal.Basic import Mathlib.Data.Nat.SuccPred #align_import set_theory.ordinal.arithmetic from "leanprover-community/mathlib"@"31b269b60935483943542d547a6dd83a66b37dc7" assert_not_exists Field assert_not_exists Module noncomputable section open Function Cardinal Set Equiv Order open sc...
Mathlib/SetTheory/Ordinal/Arithmetic.lean
1,401
1,407
theorem iSup_ord {ι} {f : ι → Cardinal} (hf : BddAbove (range f)) : (iSup f).ord = ⨆ i, (f i).ord := by
unfold iSup convert sSup_ord hf -- Porting note: `change` is required. conv_lhs => change range (ord ∘ f) rw [range_comp]
import Mathlib.MeasureTheory.Function.ConditionalExpectation.CondexpL2 #align_import measure_theory.function.conditional_expectation.condexp_L1 from "leanprover-community/mathlib"@"d8bbb04e2d2a44596798a9207ceefc0fb236e41e" noncomputable section open TopologicalSpace MeasureTheory.Lp Filter ContinuousLinearMap o...
Mathlib/MeasureTheory/Function/ConditionalExpectation/CondexpL1.lean
92
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theorem condexpIndL1Fin_add (hs : MeasurableSet s) (hμs : μ s ≠ ∞) (x y : G) : condexpIndL1Fin hm hs hμs (x + y) = condexpIndL1Fin hm hs hμs x + condexpIndL1Fin hm hs hμs y := by
ext1 refine (Memℒp.coeFn_toLp q).trans ?_ refine EventuallyEq.trans ?_ (Lp.coeFn_add _ _).symm refine EventuallyEq.trans ?_ (EventuallyEq.add (Memℒp.coeFn_toLp q).symm (Memℒp.coeFn_toLp q).symm) rw [condexpIndSMul_add] refine (Lp.coeFn_add _ _).trans (eventually_of_forall fun a => ?_) rfl
import Mathlib.Data.Nat.Bits import Mathlib.Order.Lattice #align_import data.nat.size from "leanprover-community/mathlib"@"18a5306c091183ac90884daa9373fa3b178e8607" namespace Nat section set_option linter.deprecated false theorem shiftLeft_eq_mul_pow (m) : ∀ n, m <<< n = m * 2 ^ n := shiftLeft_eq _ #align nat....
Mathlib/Data/Nat/Size.lean
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theorem size_eq_zero {n : ℕ} : size n = 0 ↔ n = 0 := by
simpa [Nat.pos_iff_ne_zero, not_iff_not] using size_pos
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
256
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theorem nhdsWithin_inter (a : α) (s t : Set α) : 𝓝[s ∩ t] a = 𝓝[s] a ⊓ 𝓝[t] a := by
delta nhdsWithin rw [inf_left_comm, inf_assoc, inf_principal, ← inf_assoc, inf_idem]
import Mathlib.GroupTheory.FreeGroup.Basic import Mathlib.GroupTheory.QuotientGroup #align_import group_theory.presented_group from "leanprover-community/mathlib"@"d90e4e186f1d18e375dcd4e5b5f6364b01cb3e46" variable {α : Type*} def PresentedGroup (rels : Set (FreeGroup α)) := FreeGroup α ⧸ Subgroup.normalClosu...
Mathlib/GroupTheory/PresentedGroup.lean
101
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theorem ext {φ ψ : PresentedGroup rels →* G} (hx : ∀ (x : α), φ (.of x) = ψ (.of x)) : φ = ψ := by
unfold PresentedGroup ext apply hx
import Mathlib.Algebra.MonoidAlgebra.Degree import Mathlib.Algebra.Polynomial.Coeff import Mathlib.Algebra.Polynomial.Monomial import Mathlib.Data.Fintype.BigOperators import Mathlib.Data.Nat.WithBot import Mathlib.Data.Nat.Cast.WithTop import Mathlib.Data.Nat.SuccPred #align_import data.polynomial.degree.definitions...
Mathlib/Algebra/Polynomial/Degree/Definitions.lean
316
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theorem degree_C_mul_X_le (a : R) : degree (C a * X) ≤ 1 := by
simpa only [pow_one] using degree_C_mul_X_pow_le 1 a
import Mathlib.Algebra.Polynomial.Basic import Mathlib.SetTheory.Cardinal.Ordinal #align_import data.polynomial.cardinal from "leanprover-community/mathlib"@"62c0a4ef1441edb463095ea02a06e87f3dfe135c" universe u open Cardinal Polynomial open Cardinal namespace Polynomial @[simp] theorem cardinal_mk_eq_max {R :...
Mathlib/Algebra/Polynomial/Cardinal.lean
34
37
theorem cardinal_mk_le_max {R : Type u} [Semiring R] : #(R[X]) ≤ max #R ℵ₀ := by
cases subsingleton_or_nontrivial R · exact (mk_eq_one _).trans_le (le_max_of_le_right one_le_aleph0) · exact cardinal_mk_eq_max.le
import Mathlib.Data.Finset.Fold import Mathlib.Algebra.GCDMonoid.Multiset #align_import algebra.gcd_monoid.finset from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" #align_import algebra.gcd_monoid.div from "leanprover-community/mathlib"@"b537794f8409bc9598febb79cd510b1df5f4539d" variab...
Mathlib/Algebra/GCDMonoid/Finset.lean
123
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theorem lcm_eq_zero_iff [Nontrivial α] : s.lcm f = 0 ↔ 0 ∈ f '' s := by
simp only [Multiset.mem_map, lcm_def, Multiset.lcm_eq_zero_iff, Set.mem_image, mem_coe, ← Finset.mem_def]
import Mathlib.Algebra.BigOperators.NatAntidiagonal import Mathlib.Algebra.Order.Ring.Abs import Mathlib.Data.Nat.Choose.Sum import Mathlib.RingTheory.PowerSeries.Basic #align_import ring_theory.power_series.well_known from "leanprover-community/mathlib"@"8199f6717c150a7fe91c4534175f4cf99725978f" namespace PowerS...
Mathlib/RingTheory/PowerSeries/WellKnown.lean
52
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theorem invUnitsSub_mul_X (u : Rˣ) : invUnitsSub u * X = invUnitsSub u * C R u - 1 := by
ext (_ | n) · simp · simp [n.succ_ne_zero, pow_succ']
import Mathlib.Data.ENNReal.Inv #align_import data.real.ennreal from "leanprover-community/mathlib"@"c14c8fcde993801fca8946b0d80131a1a81d1520" open Set NNReal ENNReal namespace ENNReal section iInf variable {ι : Sort*} {f g : ι → ℝ≥0∞} variable {a b c d : ℝ≥0∞} {r p q : ℝ≥0} theorem toNNReal_iInf (hf : ∀ i, f ...
Mathlib/Data/ENNReal/Real.lean
556
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theorem toNNReal_iSup (hf : ∀ i, f i ≠ ∞) : (iSup f).toNNReal = ⨆ i, (f i).toNNReal := by
lift f to ι → ℝ≥0 using hf simp_rw [toNNReal_coe] by_cases h : BddAbove (range f) · rw [← coe_iSup h, toNNReal_coe] · rw [NNReal.iSup_of_not_bddAbove h, iSup_coe_eq_top.2 h, top_toNNReal]
import Mathlib.Combinatorics.SimpleGraph.DegreeSum import Mathlib.Combinatorics.SimpleGraph.Subgraph #align_import combinatorics.simple_graph.matching from "leanprover-community/mathlib"@"138448ae98f529ef34eeb61114191975ee2ca508" universe u namespace SimpleGraph variable {V : Type u} {G : SimpleGraph V} (M : Su...
Mathlib/Combinatorics/SimpleGraph/Matching.lean
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theorem IsMatching.toEdge_eq_toEdge_of_adj {M : Subgraph G} {v w : V} (h : M.IsMatching) (hv : v ∈ M.verts) (hw : w ∈ M.verts) (ha : M.Adj v w) : h.toEdge ⟨v, hv⟩ = h.toEdge ⟨w, hw⟩ := by
rw [h.toEdge_eq_of_adj hv ha, h.toEdge_eq_of_adj hw (M.symm ha), Subtype.mk_eq_mk, Sym2.eq_swap]
import Mathlib.SetTheory.Ordinal.Arithmetic import Mathlib.SetTheory.Ordinal.Exponential #align_import set_theory.ordinal.cantor_normal_form from "leanprover-community/mathlib"@"991ff3b5269848f6dd942ae8e9dd3c946035dc8b" noncomputable section universe u open List namespace Ordinal @[elab_as_elim] noncomputabl...
Mathlib/SetTheory/Ordinal/CantorNormalForm.lean
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theorem CNF_of_lt {b o : Ordinal} (ho : o ≠ 0) (hb : o < b) : CNF b o = [⟨0, o⟩] := by
simp only [CNF_ne_zero ho, log_eq_zero hb, opow_zero, div_one, mod_one, CNF_zero]
import Mathlib.Analysis.InnerProductSpace.GramSchmidtOrtho import Mathlib.LinearAlgebra.Matrix.PosDef #align_import linear_algebra.matrix.ldl from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" variable {𝕜 : Type*} [RCLike 𝕜] variable {n : Type*} [LinearOrder n] [IsWellOrder n (· < ·)...
Mathlib/LinearAlgebra/Matrix/LDL.lean
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theorem LDL.lower_conj_diag : LDL.lower hS * LDL.diag hS * (LDL.lower hS)ᴴ = S := by
rw [LDL.lower, conjTranspose_nonsing_inv, Matrix.mul_assoc, Matrix.inv_mul_eq_iff_eq_mul_of_invertible (LDL.lowerInv hS), Matrix.mul_inv_eq_iff_eq_mul_of_invertible] exact LDL.diag_eq_lowerInv_conj hS
import Mathlib.Analysis.InnerProductSpace.GramSchmidtOrtho import Mathlib.LinearAlgebra.Matrix.PosDef #align_import linear_algebra.matrix.ldl from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" variable {𝕜 : Type*} [RCLike 𝕜] variable {n : Type*} [LinearOrder n] [IsWellOrder n (· < ·)...
Mathlib/LinearAlgebra/Matrix/LDL.lean
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theorem LDL.lowerInv_eq_gramSchmidtBasis : LDL.lowerInv hS = ((Pi.basisFun 𝕜 n).toMatrix (@gramSchmidtBasis 𝕜 (n → 𝕜) _ (_ : _) (InnerProductSpace.ofMatrix hS.transpose) n _ _ _ (Pi.basisFun 𝕜 n)))ᵀ := by
letI := NormedAddCommGroup.ofMatrix hS.transpose letI := InnerProductSpace.ofMatrix hS.transpose ext i j rw [LDL.lowerInv, Basis.coePiBasisFun.toMatrix_eq_transpose, coe_gramSchmidtBasis] rfl
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
48
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theorem circleTransformDeriv_periodic (f : ℂ → E) : Periodic (circleTransformDeriv R z w f) (2 * π) := by
have := periodic_circleMap simp_rw [Periodic] at * intro x simp_rw [circleTransformDeriv, this] congr 2 simp [this]
import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Nat.Prime import Mathlib.Data.List.Prime import Mathlib.Data.List.Sort import Mathlib.Data.List.Chain #align_import data.nat.factors from "leanprover-community/mathlib"@"008205aa645b3f194c1da47025c5f110c8406eab" open Bool Subtype open Nat namespac...
Mathlib/Data/Nat/Factors.lean
45
45
theorem factors_zero : factors 0 = [] := by
rw [factors]
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
501
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theorem abs_cos_eq_of_two_zsmul_eq {θ ψ : Angle} (h : (2 : ℤ) • θ = (2 : ℤ) • ψ) : |cos θ| = |cos ψ| := by
simp_rw [two_zsmul, ← two_nsmul] at h exact abs_cos_eq_of_two_nsmul_eq h
import Mathlib.Analysis.SpecialFunctions.Pow.Real #align_import analysis.special_functions.pow.nnreal from "leanprover-community/mathlib"@"4fa54b337f7d52805480306db1b1439c741848c8" noncomputable section open scoped Classical open Real NNReal ENNReal ComplexConjugate open Finset Function Set namespace NNReal var...
Mathlib/Analysis/SpecialFunctions/Pow/NNReal.lean
112
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theorem rpow_self_rpow_inv {y : ℝ} (hy : y ≠ 0) (x : ℝ≥0) : (x ^ (1 / y)) ^ y = x := by
field_simp [← rpow_mul]
import Mathlib.Data.ENNReal.Inv #align_import data.real.ennreal from "leanprover-community/mathlib"@"c14c8fcde993801fca8946b0d80131a1a81d1520" open Set NNReal ENNReal namespace ENNReal section Real variable {a b c d : ℝ≥0∞} {r p q : ℝ≥0} theorem toReal_add (ha : a ≠ ∞) (hb : b ≠ ∞) : (a + b).toReal = a.toReal ...
Mathlib/Data/ENNReal/Real.lean
509
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theorem toNNReal_div (a b : ℝ≥0∞) : (a / b).toNNReal = a.toNNReal / b.toNNReal := by
rw [div_eq_mul_inv, toNNReal_mul, toNNReal_inv, div_eq_mul_inv]
import Mathlib.Algebra.MonoidAlgebra.Basic #align_import algebra.monoid_algebra.division from "leanprover-community/mathlib"@"72c366d0475675f1309d3027d3d7d47ee4423951" variable {k G : Type*} [Semiring k] namespace AddMonoidAlgebra section variable [AddCancelCommMonoid G] noncomputable def divOf (x : k[G]) (g...
Mathlib/Algebra/MonoidAlgebra/Division.lean
105
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theorem of'_mul_divOf (a : G) (x : k[G]) : of' k G a * x /ᵒᶠ a = x := by
refine Finsupp.ext fun _ => ?_ -- Porting note: `ext` doesn't work rw [AddMonoidAlgebra.divOf_apply, of'_apply, single_mul_apply_aux, one_mul] intro c exact add_right_inj _
import Mathlib.Analysis.Complex.Basic import Mathlib.Topology.FiberBundle.IsHomeomorphicTrivialBundle #align_import analysis.complex.re_im_topology from "leanprover-community/mathlib"@"468b141b14016d54b479eb7a0fff1e360b7e3cf6" open Set noncomputable section namespace Complex theorem isHomeomorphicTrivialFiber...
Mathlib/Analysis/Complex/ReImTopology.lean
164
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theorem frontier_setOf_lt_re (a : ℝ) : frontier { z : ℂ | a < z.re } = { z | z.re = a } := by
simpa only [frontier_Ioi] using frontier_preimage_re (Ioi a)
import Mathlib.Algebra.MvPolynomial.Rename import Mathlib.Algebra.MvPolynomial.Variables #align_import data.mv_polynomial.monad from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section namespace MvPolynomial open Finsupp variable {σ : Type*} {τ : Type*} variable {R S...
Mathlib/Algebra/MvPolynomial/Monad.lean
339
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theorem bind₂_monomial (f : R →+* MvPolynomial σ S) (d : σ →₀ ℕ) (r : R) : bind₂ f (monomial d r) = f r * monomial d 1 := by
simp only [monomial_eq, RingHom.map_mul, bind₂_C_right, Finsupp.prod, map_prod, map_pow, bind₂_X_right, C_1, one_mul]
import Mathlib.MeasureTheory.Group.Action import Mathlib.MeasureTheory.Integral.SetIntegral import Mathlib.MeasureTheory.Group.Pointwise #align_import measure_theory.group.fundamental_domain from "leanprover-community/mathlib"@"3b52265189f3fb43aa631edffce5d060fafaf82f" open scoped ENNReal Pointwise Topology NNRea...
Mathlib/MeasureTheory/Group/FundamentalDomain.lean
656
658
theorem fundamentalInterior_smul [Group H] [MulAction H α] [SMulCommClass H G α] (g : H) : fundamentalInterior G (g • s) = g • fundamentalInterior G s := by
simp_rw [fundamentalInterior, smul_set_sdiff, smul_set_iUnion, smul_comm g (_ : G) (_ : Set α)]
import Mathlib.Tactic.FinCases import Mathlib.Data.Nat.Choose.Sum import Mathlib.LinearAlgebra.Finsupp import Mathlib.Algebra.Field.IsField #align_import ring_theory.ideal.basic from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" universe u v w variable {α : Type u} {β : Type v} open ...
Mathlib/RingTheory/Ideal/Basic.lean
274
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theorem not_isPrime_iff {I : Ideal α} : ¬I.IsPrime ↔ I = ⊤ ∨ ∃ (x : α) (_hx : x ∉ I) (y : α) (_hy : y ∉ I), x * y ∈ I := by
simp_rw [Ideal.isPrime_iff, not_and_or, Ne, Classical.not_not, not_forall, not_or] exact or_congr Iff.rfl ⟨fun ⟨x, y, hxy, hx, hy⟩ => ⟨x, hx, y, hy, hxy⟩, fun ⟨x, hx, y, hy, hxy⟩ => ⟨x, y, hxy, hx, hy⟩⟩
import Mathlib.Data.Real.Pi.Bounds import Mathlib.NumberTheory.NumberField.CanonicalEmbedding.ConvexBody -- TODO. Rewrite some of the FLT results on the disciminant using the definitions and results of -- this file namespace NumberField open FiniteDimensional NumberField NumberField.InfinitePlace Matrix open sco...
Mathlib/NumberTheory/NumberField/Discriminant.lean
46
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theorem discr_ne_zero : discr K ≠ 0 := by
rw [← (Int.cast_injective (α := ℚ)).ne_iff, coe_discr] exact Algebra.discr_not_zero_of_basis ℚ (integralBasis K)
import Mathlib.Probability.Notation import Mathlib.Probability.Process.Stopping #align_import probability.martingale.basic from "leanprover-community/mathlib"@"ba074af83b6cf54c3104e59402b39410ddbd6dca" open TopologicalSpace Filter open scoped NNReal ENNReal MeasureTheory ProbabilityTheory namespace MeasureTheor...
Mathlib/Probability/Martingale/Basic.lean
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theorem add (hf : Martingale f ℱ μ) (hg : Martingale g ℱ μ) : Martingale (f + g) ℱ μ := by
refine ⟨hf.adapted.add hg.adapted, fun i j hij => ?_⟩ exact (condexp_add (hf.integrable j) (hg.integrable j)).trans ((hf.2 i j hij).add (hg.2 i j hij))
import Mathlib.Algebra.Algebra.Tower import Mathlib.Analysis.LocallyConvex.WithSeminorms import Mathlib.Topology.Algebra.Module.StrongTopology import Mathlib.Analysis.NormedSpace.LinearIsometry import Mathlib.Analysis.NormedSpace.ContinuousLinearMap import Mathlib.Tactic.SuppressCompilation #align_import analysis.nor...
Mathlib/Analysis/NormedSpace/OperatorNorm/Basic.lean
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theorem opNorm_le_of_unit_norm [NormedSpace ℝ E] [NormedSpace ℝ F] {f : E →L[ℝ] F} {C : ℝ} (hC : 0 ≤ C) (hf : ∀ x, ‖x‖ = 1 → ‖f x‖ ≤ C) : ‖f‖ ≤ C := by
refine opNorm_le_bound' f hC fun x hx => ?_ have H₁ : ‖‖x‖⁻¹ • x‖ = 1 := by rw [norm_smul, norm_inv, norm_norm, inv_mul_cancel hx] have H₂ := hf _ H₁ rwa [map_smul, norm_smul, norm_inv, norm_norm, ← div_eq_inv_mul, _root_.div_le_iff] at H₂ exact (norm_nonneg x).lt_of_ne' hx
import Mathlib.RingTheory.Valuation.ValuationRing import Mathlib.RingTheory.Localization.AsSubring import Mathlib.Algebra.Ring.Subring.Pointwise import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic #align_import ring_theory.valuation.valuation_subring from "leanprover-community/mathlib"@"2196ab363eb097c008d4497125e0d...
Mathlib/RingTheory/Valuation/ValuationSubring.lean
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theorem valuation_lt_one_iff (a : A) : a ∈ LocalRing.maximalIdeal A ↔ A.valuation a < 1 := by
rw [LocalRing.mem_maximalIdeal] dsimp [nonunits]; rw [valuation_eq_one_iff] exact (A.valuation_le_one a).lt_iff_ne.symm
import Batteries.Data.List.Count import Batteries.Data.Fin.Lemmas open Nat Function namespace List theorem rel_of_pairwise_cons (p : (a :: l).Pairwise R) : ∀ {a'}, a' ∈ l → R a a' := (pairwise_cons.1 p).1 _ theorem Pairwise.of_cons (p : (a :: l).Pairwise R) : Pairwise R l := (pairwise_cons.1 p).2 theorem...
.lake/packages/batteries/Batteries/Data/List/Pairwise.lean
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theorem pairwise_bind {R : β → β → Prop} {l : List α} {f : α → List β} : List.Pairwise R (l.bind f) ↔ (∀ a ∈ l, Pairwise R (f a)) ∧ Pairwise (fun a₁ a₂ => ∀ x ∈ f a₁, ∀ y ∈ f a₂, R x y) l := by
simp [List.bind, pairwise_join, pairwise_map]
import Mathlib.SetTheory.Cardinal.ENat #align_import set_theory.cardinal.basic from "leanprover-community/mathlib"@"3ff3f2d6a3118b8711063de7111a0d77a53219a8" universe u v open Function Set namespace Cardinal variable {α : Type u} {c d : Cardinal.{u}} noncomputable def toNat : Cardinal →*₀ ℕ := ENat.toNat.com...
Mathlib/SetTheory/Cardinal/ToNat.lean
134
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theorem mk_toNat_eq_card [Fintype α] : toNat #α = Fintype.card α := by
simp
import Mathlib.FieldTheory.Finite.Basic #align_import field_theory.chevalley_warning from "leanprover-community/mathlib"@"e001509c11c4d0f549d91d89da95b4a0b43c714f" universe u v section FiniteField open MvPolynomial open Function hiding eval open Finset FiniteField variable {K σ ι : Type*} [Fintype K] [Field ...
Mathlib/FieldTheory/ChevalleyWarning.lean
196
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theorem char_dvd_card_solutions_of_add_lt {f₁ f₂ : MvPolynomial σ K} (h : f₁.totalDegree + f₂.totalDegree < Fintype.card σ) : p ∣ Fintype.card { x : σ → K // eval x f₁ = 0 ∧ eval x f₂ = 0 } := by
let F : Bool → MvPolynomial σ K := fun b => cond b f₂ f₁ have : (∑ b : Bool, (F b).totalDegree) < Fintype.card σ := (add_comm _ _).trans_lt h simpa only [Bool.forall_bool] using char_dvd_card_solutions_of_fintype_sum_lt p this
import Mathlib.Algebra.GroupPower.IterateHom import Mathlib.Analysis.SpecificLimits.Basic import Mathlib.Order.Iterate import Mathlib.Order.SemiconjSup import Mathlib.Tactic.Monotonicity import Mathlib.Topology.Order.MonotoneContinuity #align_import dynamics.circle.rotation_number.translation_number from "leanprover-...
Mathlib/Dynamics/Circle/RotationNumber/TranslationNumber.lean
611
613
theorem lt_iterate_pos_iff {x : ℝ} {m : ℤ} {n : ℕ} (hn : 0 < n) : x + n * m < f^[n] x ↔ x + m < f x := by
simpa only [not_le] using not_congr (f.iterate_pos_le_iff hn)
import Mathlib.LinearAlgebra.FreeModule.PID import Mathlib.MeasureTheory.Group.FundamentalDomain import Mathlib.MeasureTheory.Measure.Lebesgue.EqHaar import Mathlib.RingTheory.Localization.Module #align_import algebra.module.zlattice from "leanprover-community/mathlib"@"a3e83f0fa4391c8740f7d773a7a9b74e311ae2a3" n...
Mathlib/Algebra/Module/Zlattice/Basic.lean
192
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theorem fract_eq_fract (m n : E) : fract b m = fract b n ↔ -m + n ∈ span ℤ (Set.range b) := by
classical rw [eq_comm, Basis.ext_elem_iff b] simp_rw [repr_fract_apply, Int.fract_eq_fract, eq_comm, Basis.mem_span_iff_repr_mem, sub_eq_neg_add, map_add, map_neg, Finsupp.coe_add, Finsupp.coe_neg, Pi.add_apply, Pi.neg_apply, ← eq_intCast (algebraMap ℤ K) _, Set.mem_range]
import Mathlib.RingTheory.Ideal.IsPrimary import Mathlib.RingTheory.Ideal.Quotient import Mathlib.RingTheory.Polynomial.Quotient #align_import ring_theory.jacobson_ideal from "leanprover-community/mathlib"@"da420a8c6dd5bdfb85c4ced85c34388f633bc6ff" universe u v namespace Ideal variable {R : Type u} {S : Type v}...
Mathlib/RingTheory/JacobsonIdeal.lean
134
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theorem eq_jacobson_iff_sInf_maximal : I.jacobson = I ↔ ∃ M : Set (Ideal R), (∀ J ∈ M, IsMaximal J ∨ J = ⊤) ∧ I = sInf M := by
use fun hI => ⟨{ J : Ideal R | I ≤ J ∧ J.IsMaximal }, ⟨fun _ hJ => Or.inl hJ.right, hI.symm⟩⟩ rintro ⟨M, hM, hInf⟩ refine le_antisymm (fun x hx => ?_) le_jacobson rw [hInf, mem_sInf] intro I hI cases' hM I hI with is_max is_top · exact (mem_sInf.1 hx) ⟨le_sInf_iff.1 (le_of_eq hInf) I hI, is_max⟩ · exac...
import Mathlib.Data.Finset.Lattice import Mathlib.Data.Fintype.Vector import Mathlib.Data.Multiset.Sym #align_import data.finset.sym from "leanprover-community/mathlib"@"02ba8949f486ebecf93fe7460f1ed0564b5e442c" namespace Finset variable {α : Type*} @[simps] protected def sym2 (s : Finset α) : Finset (Sym2 α) :...
Mathlib/Data/Finset/Sym.lean
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theorem sym2_eq_image : s.sym2 = (s ×ˢ s).image Sym2.mk := by
ext z refine z.ind fun x y ↦ ?_ rw [mk_mem_sym2_iff, mem_image] constructor · intro h use (x, y) simp only [mem_product, h, and_self, true_and] · rintro ⟨⟨a, b⟩, h⟩ simp only [mem_product, Sym2.eq_iff] at h obtain ⟨h, (⟨rfl, rfl⟩ | ⟨rfl, rfl⟩)⟩ := h <;> simp [h]
import Mathlib.Algebra.BigOperators.Group.Finset #align_import data.nat.gcd.big_operators from "leanprover-community/mathlib"@"008205aa645b3f194c1da47025c5f110c8406eab" namespace Nat variable {ι : Type*} theorem coprime_list_prod_left_iff {l : List ℕ} {k : ℕ} : Coprime l.prod k ↔ ∀ n ∈ l, Coprime n k := by ...
Mathlib/Data/Nat/GCD/BigOperators.lean
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theorem coprime_multiset_prod_left_iff {m : Multiset ℕ} {k : ℕ} : Coprime m.prod k ↔ ∀ n ∈ m, Coprime n k := by
induction m using Quotient.inductionOn; simpa using coprime_list_prod_left_iff
import Mathlib.Order.Filter.Basic import Mathlib.Algebra.Module.Pi #align_import order.filter.germ from "leanprover-community/mathlib"@"1f0096e6caa61e9c849ec2adbd227e960e9dff58" namespace Filter variable {α β γ δ : Type*} {l : Filter α} {f g h : α → β} theorem const_eventuallyEq' [NeBot l] {a b : β} : (∀ᶠ _ in ...
Mathlib/Order/Filter/Germ.lean
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theorem map_id : map id = (id : Germ l β → Germ l β) := by
ext ⟨f⟩ rfl
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
138
141
theorem contractRight_mul_ι (a : M) (b : CliffordAlgebra Q) : b * ι Q a⌊d = d a • b - b⌊d * ι Q a := by
rw [contractRight_eq, reverse.map_mul, reverse_ι, contractLeft_ι_mul, map_sub, map_smul, reverse_reverse, reverse.map_mul, reverse_ι, contractRight_eq]
import Mathlib.RingTheory.Nilpotent.Lemmas import Mathlib.RingTheory.Ideal.QuotientOperations #align_import ring_theory.quotient_nilpotent from "leanprover-community/mathlib"@"da420a8c6dd5bdfb85c4ced85c34388f633bc6ff" theorem Ideal.isRadical_iff_quotient_reduced {R : Type*} [CommRing R] (I : Ideal R) : I.IsRad...
Mathlib/RingTheory/QuotientNilpotent.lean
26
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theorem Ideal.IsNilpotent.induction_on (hI : IsNilpotent I) {P : ∀ ⦃S : Type _⦄ [CommRing S], Ideal S → Prop} (h₁ : ∀ ⦃S : Type _⦄ [CommRing S], ∀ I : Ideal S, I ^ 2 = ⊥ → P I) (h₂ : ∀ ⦃S : Type _⦄ [CommRing S], ∀ I J : Ideal S, I ≤ J → P I → P (J.map (Ideal.Quotient.mk I)) → P J) : P I := by
obtain ⟨n, hI : I ^ n = ⊥⟩ := hI induction' n using Nat.strong_induction_on with n H generalizing S by_cases hI' : I = ⊥ · subst hI' apply h₁ rw [← Ideal.zero_eq_bot, zero_pow two_ne_zero] cases' n with n · rw [pow_zero, Ideal.one_eq_top] at hI haveI := subsingleton_of_bot_eq_top hI.symm ex...
import Mathlib.Algebra.Algebra.Subalgebra.Pointwise import Mathlib.AlgebraicGeometry.PrimeSpectrum.Maximal import Mathlib.AlgebraicGeometry.PrimeSpectrum.Noetherian import Mathlib.RingTheory.ChainOfDivisors import Mathlib.RingTheory.DedekindDomain.Basic import Mathlib.RingTheory.FractionalIdeal.Operations #align_impo...
Mathlib/RingTheory/DedekindDomain/Ideal.lean
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theorem invertible_iff_generator_nonzero (I : FractionalIdeal R₁⁰ K) [Submodule.IsPrincipal (I : Submodule R₁ K)] : I * I⁻¹ = 1 ↔ generator (I : Submodule R₁ K) ≠ 0 := by
constructor · intro hI hg apply ne_zero_of_mul_eq_one _ _ hI rw [eq_spanSingleton_of_principal I, hg, spanSingleton_zero] · intro hg apply invertible_of_principal rw [eq_spanSingleton_of_principal I] intro hI have := mem_spanSingleton_self R₁⁰ (generator (I : Submodule R₁ K)) rw [hI, ...
import Mathlib.Algebra.Order.Ring.Abs #align_import data.int.order.lemmas from "leanprover-community/mathlib"@"fc2ed6f838ce7c9b7c7171e58d78eaf7b438fb0e" open Function Nat namespace Int variable {a b : ℤ} {n : ℕ} theorem natAbs_eq_iff_mul_self_eq {a b : ℤ} : a.natAbs = b.natAbs ↔ a * a = b * b := by rw [← a...
Mathlib/Data/Int/Order/Lemmas.lean
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theorem dvd_div_of_mul_dvd {a b c : ℤ} (h : a * b ∣ c) : b ∣ c / a := by
rcases eq_or_ne a 0 with (rfl | ha) · simp only [Int.ediv_zero, Int.dvd_zero] rcases h with ⟨d, rfl⟩ refine ⟨d, ?_⟩ rw [mul_assoc, Int.mul_ediv_cancel_left _ ha]
import Mathlib.Order.Filter.Basic import Mathlib.Topology.Bases import Mathlib.Data.Set.Accumulate import Mathlib.Topology.Bornology.Basic import Mathlib.Topology.LocallyFinite open Set Filter Topology TopologicalSpace Classical Function universe u v variable {X : Type u} {Y : Type v} {ι : Type*} variable [Topolog...
Mathlib/Topology/Compactness/Compact.lean
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theorem IsCompact.prod_nhdsSet_eq_biSup {K : Set Y} (hK : IsCompact K) (l : Filter X) : l ×ˢ (𝓝ˢ K) = ⨆ y ∈ K, l ×ˢ 𝓝 y := by
simp only [prod_comm (f := l), hK.nhdsSet_prod_eq_biSup, map_iSup]
import Mathlib.Algebra.Bounds import Mathlib.Algebra.Order.Archimedean import Mathlib.Data.Real.Basic import Mathlib.Order.Interval.Set.Disjoint #align_import data.real.basic from "leanprover-community/mathlib"@"cb42593171ba005beaaf4549fcfe0dece9ada4c9" open scoped Classical open Pointwise CauSeq namespace Real ...
Mathlib/Data/Real/Archimedean.lean
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theorem sInf_nonneg (S : Set ℝ) (hS : ∀ x ∈ S, (0 : ℝ) ≤ x) : 0 ≤ sInf S := by
rcases S.eq_empty_or_nonempty with (rfl | hS₂) exacts [sInf_empty.ge, le_csInf hS₂ hS]
import Mathlib.MeasureTheory.Constructions.Prod.Basic import Mathlib.MeasureTheory.Group.Measure import Mathlib.Topology.Constructions #align_import measure_theory.constructions.pi from "leanprover-community/mathlib"@"fd5edc43dc4f10b85abfe544b88f82cf13c5f844" noncomputable section open Function Set MeasureTheory...
Mathlib/MeasureTheory/Constructions/Pi.lean
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theorem piPremeasure_pi_eval {s : Set (∀ i, α i)} : piPremeasure m (pi univ fun i => eval i '' s) = piPremeasure m s := by
simp only [eval, piPremeasure_pi']; rfl