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import Mathlib.Data.List.Basic #align_import data.list.join from "leanprover-community/mathlib"@"18a5306c091183ac90884daa9373fa3b178e8607" -- Make sure we don't import algebra assert_not_exists Monoid variable {α β : Type*} namespace List attribute [simp] join -- Porting note (#10618): simp can prove this -- @...
Mathlib/Data/List/Join.lean
168
176
theorem eq_iff_join_eq (L L' : List (List α)) : L = L' ↔ L.join = L'.join ∧ map length L = map length L' := by
refine ⟨fun H => by simp [H], ?_⟩ rintro ⟨join_eq, length_eq⟩ apply ext_get · have : length (map length L) = length (map length L') := by rw [length_eq] simpa using this · intro n h₁ h₂ rw [← drop_take_succ_join_eq_get', ← drop_take_succ_join_eq_get', join_eq, length_eq]
import Mathlib.Data.List.OfFn import Mathlib.Data.List.Range #align_import data.list.indexes from "leanprover-community/mathlib"@"8631e2d5ea77f6c13054d9151d82b83069680cb1" assert_not_exists MonoidWithZero universe u v open Function namespace List variable {α : Type u} {β : Type v} section MapIdx -- Porting n...
Mathlib/Data/List/Indexes.lean
61
71
theorem list_reverse_induction (p : List α → Prop) (base : p []) (ind : ∀ (l : List α) (e : α), p l → p (l ++ [e])) : (∀ (l : List α), p l) := by
let q := fun l ↦ p (reverse l) have pq : ∀ l, p (reverse l) → q l := by simp only [q, reverse_reverse]; intro; exact id have qp : ∀ l, q (reverse l) → p l := by simp only [q, reverse_reverse]; intro; exact id intro l apply qp generalize (reverse l) = l induction' l with head tail ih · apply pq; simp on...
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
159
175
theorem le_degrees_add {p q : MvPolynomial σ R} (h : p.degrees.Disjoint q.degrees) : p.degrees ≤ (p + q).degrees := by
classical apply Finset.sup_le intro d hd rw [Multiset.disjoint_iff_ne] at h obtain rfl | h0 := eq_or_ne d 0 · rw [toMultiset_zero]; apply Multiset.zero_le · refine Finset.le_sup_of_le (b := d) ?_ le_rfl rw [mem_support_iff, coeff_add] suffices q.coeff d = 0 by rwa [this, add_zero, coeff, ← Finsup...
import Mathlib.LinearAlgebra.Matrix.Symmetric import Mathlib.LinearAlgebra.Matrix.Orthogonal import Mathlib.Data.Matrix.Kronecker #align_import linear_algebra.matrix.is_diag from "leanprover-community/mathlib"@"55e2dfde0cff928ce5c70926a3f2c7dee3e2dd99" namespace Matrix variable {α β R n m : Type*} open Function...
Mathlib/LinearAlgebra/Matrix/IsDiag.lean
169
179
theorem isDiag_fromBlocks_iff [Zero α] {A : Matrix m m α} {B : Matrix m n α} {C : Matrix n m α} {D : Matrix n n α} : (A.fromBlocks B C D).IsDiag ↔ A.IsDiag ∧ B = 0 ∧ C = 0 ∧ D.IsDiag := by
constructor · intro h refine ⟨fun i j hij => ?_, ext fun i j => ?_, ext fun i j => ?_, fun i j hij => ?_⟩ · exact h (Sum.inl_injective.ne hij) · exact h Sum.inl_ne_inr · exact h Sum.inr_ne_inl · exact h (Sum.inr_injective.ne hij) · rintro ⟨ha, hb, hc, hd⟩ convert IsDiag.fromBlocks ha hd
import Mathlib.Algebra.Group.Subgroup.Pointwise import Mathlib.Data.Set.Basic import Mathlib.Data.Setoid.Basic import Mathlib.GroupTheory.Coset #align_import group_theory.double_coset from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" -- Porting note: removed import -- import Mathlib.Tac...
Mathlib/GroupTheory/DoubleCoset.lean
105
114
theorem rel_bot_eq_right_group_rel (H : Subgroup G) : (setoid ↑H ↑(⊥ : Subgroup G)).Rel = (QuotientGroup.rightRel H).Rel := by
ext a b rw [rel_iff, Setoid.Rel, QuotientGroup.rightRel_apply] constructor · rintro ⟨b, hb, a, rfl : a = 1, rfl⟩ change b * a * 1 * a⁻¹ ∈ H rwa [mul_one, mul_inv_cancel_right] · rintro (h : b * a⁻¹ ∈ H) exact ⟨b * a⁻¹, h, 1, rfl, by rw [mul_one, inv_mul_cancel_right]⟩
import Mathlib.Combinatorics.Enumerative.DoubleCounting import Mathlib.Combinatorics.SimpleGraph.AdjMatrix import Mathlib.Combinatorics.SimpleGraph.Basic import Mathlib.Data.Set.Finite #align_import combinatorics.simple_graph.strongly_regular from "leanprover-community/mathlib"@"2b35fc7bea4640cb75e477e83f32fbd5389208...
Mathlib/Combinatorics/SimpleGraph/StronglyRegular.lean
125
134
theorem sdiff_compl_neighborFinset_inter_eq {v w : V} (h : G.Adj v w) : ((G.neighborFinset v)ᶜ ∩ (G.neighborFinset w)ᶜ) \ ({w} ∪ {v}) = (G.neighborFinset v)ᶜ ∩ (G.neighborFinset w)ᶜ := by
ext simp only [and_imp, mem_union, mem_sdiff, mem_compl, and_iff_left_iff_imp, mem_neighborFinset, mem_inter, mem_singleton] rintro hnv hnw (rfl | rfl) · exact hnv h · apply hnw rwa [adj_comm]
import Mathlib.Order.Interval.Set.Monotone import Mathlib.Probability.Process.HittingTime import Mathlib.Probability.Martingale.Basic import Mathlib.Tactic.AdaptationNote #align_import probability.martingale.upcrossing from "leanprover-community/mathlib"@"2c1d8ca2812b64f88992a5294ea3dba144755cd1" open Topological...
Mathlib/Probability/Martingale/Upcrossing.lean
219
223
theorem upperCrossingTime_mono (hnm : n ≤ m) : upperCrossingTime a b f N n ω ≤ upperCrossingTime a b f N m ω := by
suffices Monotone fun n => upperCrossingTime a b f N n ω by exact this hnm exact monotone_nat_of_le_succ fun n => le_trans upperCrossingTime_le_lowerCrossingTime lowerCrossingTime_le_upperCrossingTime_succ
import Mathlib.Data.List.Range import Mathlib.Data.Multiset.Range #align_import data.multiset.nodup from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" namespace Multiset open Function List variable {α β γ : Type*} {r : α → α → Prop} {s t : Multiset α} {a : α} -- nodup def Nodup (s ...
Mathlib/Data/Multiset/Nodup.lean
190
192
theorem Nodup.mem_erase_iff [DecidableEq α] {a b : α} {l} (d : Nodup l) : a ∈ l.erase b ↔ a ≠ b ∧ a ∈ l := by
rw [d.erase_eq_filter b, mem_filter, and_comm]
import Mathlib.Order.Filter.Lift import Mathlib.Topology.Defs.Filter #align_import topology.basic from "leanprover-community/mathlib"@"e354e865255654389cc46e6032160238df2e0f40" noncomputable section open Set Filter universe u v w x def TopologicalSpace.ofClosed {X : Type u} (T : Set (Set X)) (empty_mem : ∅ ∈...
Mathlib/Topology/Basic.lean
870
873
theorem nhds_basis_opens' (x : X) : (𝓝 x).HasBasis (fun s : Set X => s ∈ 𝓝 x ∧ IsOpen s) fun x => x := by
convert nhds_basis_opens x using 2 exact and_congr_left_iff.2 IsOpen.mem_nhds_iff
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
688
690
theorem toReal_coe_eq_self_sub_two_pi_iff {θ : ℝ} : (θ : Angle).toReal = θ - 2 * π ↔ θ ∈ Set.Ioc π (3 * π) := by
convert @toReal_coe_eq_self_sub_two_mul_int_mul_pi_iff θ 1 <;> norm_num
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
205
219
theorem map_get_sublist {l : List α} {is : List (Fin l.length)} (h : is.Pairwise (·.val < ·.val)) : is.map (get l) <+ l := by
suffices ∀ n l', l' = l.drop n → (∀ i ∈ is, n ≤ i) → map (get l) is <+ l' from this 0 l (by simp) (by simp) intro n l' hl' his induction is generalizing n l' with | nil => simp | cons hd tl IH => simp; cases hl' have := IH h.of_cons (hd+1) _ rfl (pairwise_cons.mp h).1 specialize his hd (.head...
import Mathlib.Topology.Order.MonotoneContinuity import Mathlib.Topology.Algebra.Order.LiminfLimsup import Mathlib.Topology.Instances.NNReal import Mathlib.Topology.EMetricSpace.Lipschitz import Mathlib.Topology.Metrizable.Basic import Mathlib.Topology.Order.T5 #align_import topology.instances.ennreal from "leanprove...
Mathlib/Topology/Instances/ENNReal.lean
471
477
theorem continuous_sub_right (a : ℝ≥0∞) : Continuous fun x : ℝ≥0∞ => x - a := by
by_cases a_infty : a = ∞ · simp [a_infty, continuous_const] · rw [show (fun x => x - a) = (fun p : ℝ≥0∞ × ℝ≥0∞ => p.fst - p.snd) ∘ fun x => ⟨x, a⟩ by rfl] apply ContinuousOn.comp_continuous continuousOn_sub (continuous_id'.prod_mk continuous_const) intro x simp only [a_infty, Ne, mem_setOf_eq, Prod.m...
import Mathlib.RingTheory.Ideal.Cotangent import Mathlib.RingTheory.DedekindDomain.Basic import Mathlib.RingTheory.Valuation.ValuationRing import Mathlib.RingTheory.Nakayama #align_import ring_theory.discrete_valuation_ring.tfae from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" variab...
Mathlib/RingTheory/DiscreteValuationRing/TFAE.lean
92
150
theorem maximalIdeal_isPrincipal_of_isDedekindDomain [LocalRing R] [IsDomain R] [IsDedekindDomain R] : (maximalIdeal R).IsPrincipal := by
classical by_cases ne_bot : maximalIdeal R = ⊥ · rw [ne_bot]; infer_instance obtain ⟨a, ha₁, ha₂⟩ : ∃ a ∈ maximalIdeal R, a ≠ (0 : R) := by by_contra! h'; apply ne_bot; rwa [eq_bot_iff] have hle : Ideal.span {a} ≤ maximalIdeal R := by rwa [Ideal.span_le, Set.singleton_subset_iff] have : (Ideal.span {a}...
import Mathlib.Analysis.NormedSpace.IndicatorFunction import Mathlib.MeasureTheory.Function.EssSup import Mathlib.MeasureTheory.Function.AEEqFun import Mathlib.MeasureTheory.Function.SpecialFunctions.Basic #align_import measure_theory.function.lp_seminorm from "leanprover-community/mathlib"@"c4015acc0a223449d44061e27...
Mathlib/MeasureTheory/Function/LpSeminorm/Basic.lean
102
102
theorem snorm_exponent_top {f : α → F} : snorm f ∞ μ = snormEssSup f μ := by
simp [snorm]
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.Analysis.Calculus.ContDiff.Defs #align_import analysis.calculus.iterated_deriv from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" noncomputable section open scoped Classical Topology open Filter Asymptotics Set variable {𝕜...
Mathlib/Analysis/Calculus/IteratedDeriv/Defs.lean
228
231
theorem iteratedFDeriv_eq_equiv_comp : iteratedFDeriv 𝕜 n f = ContinuousMultilinearMap.piFieldEquiv 𝕜 (Fin n) F ∘ iteratedDeriv n f := by
rw [iteratedDeriv_eq_equiv_comp, ← Function.comp.assoc, LinearIsometryEquiv.self_comp_symm, Function.id_comp]
import Mathlib.CategoryTheory.Monoidal.Category import Mathlib.CategoryTheory.Adjunction.FullyFaithful import Mathlib.CategoryTheory.Products.Basic #align_import category_theory.monoidal.functor from "leanprover-community/mathlib"@"3d7987cda72abc473c7cdbbb075170e9ac620042" open CategoryTheory universe v₁ v₂ v₃ u...
Mathlib/CategoryTheory/Monoidal/Functor.lean
178
182
theorem LaxMonoidalFunctor.associativity_inv (F : LaxMonoidalFunctor C D) (X Y Z : C) : F.obj X ◁ F.μ Y Z ≫ F.μ X (Y ⊗ Z) ≫ F.map (α_ X Y Z).inv = (α_ (F.obj X) (F.obj Y) (F.obj Z)).inv ≫ F.μ X Y ▷ F.obj Z ≫ F.μ (X ⊗ Y) Z := by
rw [Iso.eq_inv_comp, ← F.associativity_assoc, ← F.toFunctor.map_comp, Iso.hom_inv_id, F.toFunctor.map_id, comp_id]
import Mathlib.Probability.Independence.Basic import Mathlib.Probability.Independence.Conditional #align_import probability.independence.zero_one from "leanprover-community/mathlib"@"2f8347015b12b0864dfaf366ec4909eb70c78740" open MeasureTheory MeasurableSpace open scoped MeasureTheory ENNReal namespace Probabili...
Mathlib/Probability/Independence/ZeroOne.lean
64
74
theorem condexp_eq_zero_or_one_of_condIndepSet_self [StandardBorelSpace Ω] [Nonempty Ω] (hm : m ≤ m0) [hμ : IsFiniteMeasure μ] {t : Set Ω} (ht : MeasurableSet t) (h_indep : CondIndepSet m hm t t μ) : ∀ᵐ ω ∂μ, (μ⟦t | m⟧) ω = 0 ∨ (μ⟦t | m⟧) ω = 1 := by
have h := ae_of_ae_trim hm (kernel.measure_eq_zero_or_one_of_indepSet_self h_indep) filter_upwards [condexpKernel_ae_eq_condexp hm ht, h] with ω hω_eq hω rw [← hω_eq, ENNReal.toReal_eq_zero_iff, ENNReal.toReal_eq_one_iff] cases hω with | inl h => exact Or.inl (Or.inl h) | inr h => exact Or.inr h
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
171
173
theorem log_pos_iff (hx : 0 < x) : 0 < log x ↔ 1 < x := by
rw [← log_one] exact log_lt_log_iff zero_lt_one hx
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.GeomSum import Mathlib.Algebra.Order.Ring.Abs import Mathlib.Data.Nat.Bitwise import Mathlib.Data.Nat.Log import Mathlib.Data.Nat.Prime import Mathlib.Data.Nat.Digits import Mathlib.RingTheory.Multiplicity #align_import data.nat.multiplicity from "l...
Mathlib/Data/Nat/Multiplicity.lean
138
158
theorem multiplicity_factorial_mul_succ {n p : ℕ} (hp : p.Prime) : multiplicity p (p * (n + 1))! = multiplicity p (p * n)! + multiplicity p (n + 1) + 1 := by
have hp' := hp.prime have h0 : 2 ≤ p := hp.two_le have h1 : 1 ≤ p * n + 1 := Nat.le_add_left _ _ have h2 : p * n + 1 ≤ p * (n + 1) := by linarith have h3 : p * n + 1 ≤ p * (n + 1) + 1 := by omega have hm : multiplicity p (p * n)! ≠ ⊤ := by rw [Ne, eq_top_iff_not_finite, Classical.not_not, finite_nat_if...
import Mathlib.Combinatorics.SimpleGraph.AdjMatrix import Mathlib.LinearAlgebra.Matrix.PosDef open Finset Matrix namespace SimpleGraph variable {V : Type*} (R : Type*) variable [Fintype V] [DecidableEq V] (G : SimpleGraph V) [DecidableRel G.Adj] def degMatrix [AddMonoidWithOne R] : Matrix V V R := Matrix.diago...
Mathlib/Combinatorics/SimpleGraph/LapMatrix.lean
103
106
theorem lapMatrix_toLin'_apply_eq_zero_iff_forall_adj (x : V → ℝ) : Matrix.toLin' (G.lapMatrix ℝ) x = 0 ↔ ∀ i j : V, G.Adj i j → x i = x j := by
rw [← (posSemidef_lapMatrix ℝ G).toLinearMap₂'_zero_iff, star_trivial, lapMatrix_toLinearMap₂'_apply'_eq_zero_iff_forall_adj]
import Mathlib.Tactic.Ring import Mathlib.Data.PNat.Prime #align_import data.pnat.xgcd from "leanprover-community/mathlib"@"6afc9b06856ad973f6a2619e3e8a0a8d537a58f2" open Nat namespace PNat structure XgcdType where wp : ℕ x : ℕ y : ℕ zp : ℕ ap : ℕ bp : ℕ deriving Inhabited #alig...
Mathlib/Data/PNat/Xgcd.lean
353
355
theorem reduce_b {u : XgcdType} (h : u.r ≠ 0) : u.reduce = u.step.reduce.flip := by
rw [reduce] exact if_neg h
import Mathlib.Analysis.NormedSpace.OperatorNorm.Bilinear import Mathlib.Analysis.NormedSpace.OperatorNorm.NNNorm import Mathlib.Analysis.NormedSpace.Span suppress_compilation open Bornology open Filter hiding map_smul open scoped Classical NNReal Topology Uniformity -- the `ₗ` subscript variables are for special...
Mathlib/Analysis/NormedSpace/OperatorNorm/NormedSpace.lean
140
146
theorem homothety_norm [RingHomIsometric σ₁₂] [Nontrivial E] (f : E →SL[σ₁₂] F) {a : ℝ} (hf : ∀ x, ‖f x‖ = a * ‖x‖) : ‖f‖ = a := by
obtain ⟨x, hx⟩ : ∃ x : E, x ≠ 0 := exists_ne 0 rw [← norm_pos_iff] at hx have ha : 0 ≤ a := by simpa only [hf, hx, mul_nonneg_iff_of_pos_right] using norm_nonneg (f x) apply le_antisymm (f.opNorm_le_bound ha fun y => le_of_eq (hf y)) simpa only [hf, hx, mul_le_mul_right] using f.le_opNorm x
import Mathlib.RingTheory.DedekindDomain.Ideal #align_import number_theory.ramification_inertia from "leanprover-community/mathlib"@"039a089d2a4b93c761b234f3e5f5aeb752bac60f" namespace Ideal universe u v variable {R : Type u} [CommRing R] variable {S : Type v} [CommRing S] (f : R →+* S) variable (p : Ideal R) (...
Mathlib/NumberTheory/RamificationInertia.lean
153
156
theorem ramificationIdx_eq_factors_count (hp0 : map f p ≠ ⊥) (hP : P.IsPrime) (hP0 : P ≠ ⊥) : ramificationIdx f p P = (factors (map f p)).count P := by
rw [IsDedekindDomain.ramificationIdx_eq_normalizedFactors_count hp0 hP hP0, factors_eq_normalizedFactors]
import Mathlib.Analysis.InnerProductSpace.PiL2 import Mathlib.Analysis.SpecialFunctions.Sqrt import Mathlib.Analysis.NormedSpace.HomeomorphBall #align_import analysis.inner_product_space.calculus from "leanprover-community/mathlib"@"f9dd3204df14a0749cd456fac1e6849dfe7d2b88" noncomputable section open RCLike Real ...
Mathlib/Analysis/InnerProductSpace/Calculus.lean
310
313
theorem differentiableWithinAt_euclidean : DifferentiableWithinAt 𝕜 f t y ↔ ∀ i, DifferentiableWithinAt 𝕜 (fun x => f x i) t y := by
rw [← (EuclideanSpace.equiv ι 𝕜).comp_differentiableWithinAt_iff, differentiableWithinAt_pi] rfl
import Mathlib.Data.Set.Image #align_import order.directed from "leanprover-community/mathlib"@"ffde2d8a6e689149e44fd95fa862c23a57f8c780" open Function universe u v w variable {α : Type u} {β : Type v} {ι : Sort w} (r r' s : α → α → Prop) local infixl:50 " ≼ " => r def Directed (f : ι → α) := ∀ x y, ∃ z, ...
Mathlib/Order/Directed.lean
254
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theorem directedOn_pair' (h : Reflexive r) {a b : α} (hab : a ≼ b) : DirectedOn r ({b, a} : Set α) := by
rw [Set.pair_comm] apply directedOn_pair h hab
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
232
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theorem hom_comp_eq_id (α : X ≅ Y) {f : Y ⟶ X} : α.hom ≫ f = 𝟙 X ↔ f = α.inv := by
rw [← eq_inv_comp, comp_id]
import Mathlib.MeasureTheory.Constructions.BorelSpace.Order #align_import measure_theory.function.simple_func from "leanprover-community/mathlib"@"bf6a01357ff5684b1ebcd0f1a13be314fc82c0bf" noncomputable section open Set hiding restrict restrict_apply open Filter ENNReal open Function (support) open scoped Cla...
Mathlib/MeasureTheory/Function/SimpleFunc.lean
66
67
theorem coe_injective ⦃f g : α →ₛ β⦄ (H : (f : α → β) = g) : f = g := by
cases f; cases g; congr
import Mathlib.Algebra.Polynomial.Div import Mathlib.RingTheory.Polynomial.Basic import Mathlib.RingTheory.Ideal.QuotientOperations #align_import ring_theory.polynomial.quotient from "leanprover-community/mathlib"@"4f840b8d28320b20c87db17b3a6eef3d325fca87" set_option linter.uppercaseLean3 false open Polynomial ...
Mathlib/RingTheory/Polynomial/Quotient.lean
175
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theorem eq_zero_of_polynomial_mem_map_range (I : Ideal R[X]) (x : ((Quotient.mk I).comp C).range) (hx : C x ∈ I.map (Polynomial.mapRingHom ((Quotient.mk I).comp C).rangeRestrict)) : x = 0 := by
let i := ((Quotient.mk I).comp C).rangeRestrict have hi' : RingHom.ker (Polynomial.mapRingHom i) ≤ I := by refine fun f hf => polynomial_mem_ideal_of_coeff_mem_ideal I f fun n => ?_ rw [mem_comap, ← Quotient.eq_zero_iff_mem, ← RingHom.comp_apply] rw [RingHom.mem_ker, coe_mapRingHom] at hf replace h...
import Mathlib.RingTheory.Algebraic import Mathlib.RingTheory.Localization.AtPrime import Mathlib.RingTheory.Localization.Integral #align_import ring_theory.ideal.over from "leanprover-community/mathlib"@"198cb64d5c961e1a8d0d3e219feb7058d5353861" variable {R : Type*} [CommRing R] namespace Ideal open Polynomial...
Mathlib/RingTheory/Ideal/Over.lean
56
70
theorem exists_coeff_ne_zero_mem_comap_of_non_zero_divisor_root_mem {r : S} (r_non_zero_divisor : ∀ {x}, x * r = 0 → x = 0) (hr : r ∈ I) {p : R[X]} : p ≠ 0 → p.eval₂ f r = 0 → ∃ i, p.coeff i ≠ 0 ∧ p.coeff i ∈ I.comap f := by
refine p.recOnHorner ?_ ?_ ?_ · intro h contradiction · intro p a coeff_eq_zero a_ne_zero _ _ hp refine ⟨0, ?_, coeff_zero_mem_comap_of_root_mem hr hp⟩ simp [coeff_eq_zero, a_ne_zero] · intro p p_nonzero ih _ hp rw [eval₂_mul, eval₂_X] at hp obtain ⟨i, hi, mem⟩ := ih p_nonzero (r_non_zero_d...
import Mathlib.CategoryTheory.Subobject.Limits #align_import algebra.homology.image_to_kernel from "leanprover-community/mathlib"@"618ea3d5c99240cd7000d8376924906a148bf9ff" universe v u w open CategoryTheory CategoryTheory.Limits variable {ι : Type*} variable {V : Type u} [Category.{v} V] [HasZeroMorphisms V] o...
Mathlib/Algebra/Homology/ImageToKernel.lean
214
216
theorem homology'.π_desc {D : V} (k : (kernelSubobject g : V) ⟶ D) (p : imageToKernel f g w ≫ k = 0) : homology'.π f g w ≫ homology'.desc f g w k p = k := by
simp [homology'.π, homology'.desc]
import Mathlib.Analysis.Calculus.MeanValue #align_import analysis.calculus.extend_deriv from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" variable {E : Type*} [NormedAddCommGroup E] [NormedSpace ℝ E] {F : Type*} [NormedAddCommGroup F] [NormedSpace ℝ F] open Filter Set Metric Contin...
Mathlib/Analysis/Calculus/FDeriv/Extend.lean
37
106
theorem has_fderiv_at_boundary_of_tendsto_fderiv {f : E → F} {s : Set E} {x : E} {f' : E →L[ℝ] F} (f_diff : DifferentiableOn ℝ f s) (s_conv : Convex ℝ s) (s_open : IsOpen s) (f_cont : ∀ y ∈ closure s, ContinuousWithinAt f s y) (h : Tendsto (fun y => fderiv ℝ f y) (𝓝[s] x) (𝓝 f')) : HasFDerivWithinAt f...
classical -- one can assume without loss of generality that `x` belongs to the closure of `s`, as the -- statement is empty otherwise by_cases hx : x ∉ closure s · rw [← closure_closure] at hx; exact hasFDerivWithinAt_of_nmem_closure hx push_neg at hx rw [HasFDerivWithinAt, hasFDerivAtFilter_...
import Mathlib.Algebra.Polynomial.FieldDivision import Mathlib.FieldTheory.Minpoly.Basic import Mathlib.RingTheory.Algebraic #align_import field_theory.minpoly.field from "leanprover-community/mathlib"@"cbdf7b565832144d024caa5a550117c6df0204a5" open scoped Classical open Polynomial Set Function minpoly namespace...
Mathlib/FieldTheory/Minpoly/Field.lean
220
221
theorem zero : minpoly A (0 : B) = X := by
simpa only [add_zero, C_0, sub_eq_add_neg, neg_zero, RingHom.map_zero] using eq_X_sub_C B (0 : A)
import Mathlib.Algebra.MvPolynomial.Degrees #align_import data.mv_polynomial.variables from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section open Set Function Finsupp AddMonoidAlgebra universe u v w variable {R : Type u} {S : Type v} namespace MvPolynomial varia...
Mathlib/Algebra/MvPolynomial/Variables.lean
124
126
theorem vars_mul [DecidableEq σ] (φ ψ : MvPolynomial σ R) : (φ * ψ).vars ⊆ φ.vars ∪ ψ.vars := by
simp_rw [vars_def, ← Multiset.toFinset_add, Multiset.toFinset_subset] exact Multiset.subset_of_le (degrees_mul φ ψ)
import Mathlib.CategoryTheory.Subobject.Lattice #align_import category_theory.subobject.limits from "leanprover-community/mathlib"@"956af7c76589f444f2e1313911bad16366ea476d" universe v u noncomputable section open CategoryTheory CategoryTheory.Category CategoryTheory.Limits CategoryTheory.Subobject Opposite var...
Mathlib/CategoryTheory/Subobject/Limits.lean
164
164
theorem kernelSubobjectMap_id : kernelSubobjectMap (𝟙 (Arrow.mk f)) = 𝟙 _ := by
aesop_cat
import Mathlib.Init.ZeroOne import Mathlib.Data.Set.Defs import Mathlib.Order.Basic import Mathlib.Order.SymmDiff import Mathlib.Tactic.Tauto import Mathlib.Tactic.ByContra import Mathlib.Util.Delaborators #align_import data.set.basic from "leanprover-community/mathlib"@"001ffdc42920050657fd45bd2b8bfbec8eaaeb29" ...
Mathlib/Data/Set/Basic.lean
2,077
2,079
theorem pair_eq_pair_iff {x y z w : α} : ({x, y} : Set α) = {z, w} ↔ x = z ∧ y = w ∨ x = w ∧ y = z := by
simp [subset_antisymm_iff, insert_subset_iff]; aesop
import Mathlib.Algebra.GroupWithZero.NonZeroDivisors import Mathlib.LinearAlgebra.BilinearForm.Properties open LinearMap (BilinForm) universe u v w variable {R : Type*} {M : Type*} [CommSemiring R] [AddCommMonoid M] [Module R M] variable {R₁ : Type*} {M₁ : Type*} [CommRing R₁] [AddCommGroup M₁] [Module R₁ M₁] va...
Mathlib/LinearAlgebra/BilinearForm/Orthogonal.lean
100
105
theorem isOrtho_smul_left {x y : M₄} {a : R₄} (ha : a ≠ 0) : IsOrtho G (a • x) y ↔ IsOrtho G x y := by
dsimp only [IsOrtho] rw [map_smul] simp only [LinearMap.smul_apply, smul_eq_mul, mul_eq_zero, or_iff_right_iff_imp] exact fun a ↦ (ha a).elim
import Mathlib.Data.Finset.Pi import Mathlib.Data.Fintype.Basic #align_import data.fintype.pi from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" variable {α : Type*} open Finset namespace Fintype variable [DecidableEq α] [Fintype α] {γ δ : α → Type*} {s : ∀ a, Finset (γ a)} def pi...
Mathlib/Data/Fintype/Pi.lean
34
42
theorem mem_piFinset {t : ∀ a, Finset (δ a)} {f : ∀ a, δ a} : f ∈ piFinset t ↔ ∀ a, f a ∈ t a := by
constructor · simp only [piFinset, mem_map, and_imp, forall_prop_of_true, exists_prop, mem_univ, exists_imp, mem_pi] rintro g hg hgf a rw [← hgf] exact hg a · simp only [piFinset, mem_map, forall_prop_of_true, exists_prop, mem_univ, mem_pi] exact fun hf => ⟨fun a _ => f a, hf, rfl⟩
import Mathlib.Algebra.MvPolynomial.Variables #align_import data.mv_polynomial.comm_ring from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section open Set Function Finsupp AddMonoidAlgebra universe u v variable {R : Type u} {S : Type v} namespace MvPolynomial varia...
Mathlib/Algebra/MvPolynomial/CommRing.lean
96
97
theorem degrees_neg (p : MvPolynomial σ R) : (-p).degrees = p.degrees := by
rw [degrees, support_neg]; 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
202
203
theorem symm_self_id_assoc (α : X ≅ Y) (β : Y ≅ Z) : α.symm ≪≫ α ≪≫ β = β := by
rw [← trans_assoc, symm_self_id, refl_trans]
import Mathlib.Algebra.Polynomial.Splits #align_import algebra.cubic_discriminant from "leanprover-community/mathlib"@"930133160e24036d5242039fe4972407cd4f1222" noncomputable section @[ext] structure Cubic (R : Type*) where (a b c d : R) #align cubic Cubic namespace Cubic open Cubic Polynomial open Polynom...
Mathlib/Algebra/CubicDiscriminant.lean
75
78
theorem prod_X_sub_C_eq [CommRing S] {x y z : S} : (X - C x) * (X - C y) * (X - C z) = toPoly ⟨1, -(x + y + z), x * y + x * z + y * z, -(x * y * z)⟩ := by
rw [← one_mul <| X - C x, ← C_1, C_mul_prod_X_sub_C_eq, one_mul, one_mul, one_mul]
import Mathlib.MeasureTheory.Constructions.Prod.Basic import Mathlib.MeasureTheory.Integral.DominatedConvergence import Mathlib.MeasureTheory.Integral.SetIntegral #align_import measure_theory.constructions.prod.integral from "leanprover-community/mathlib"@"fd5edc43dc4f10b85abfe544b88f82cf13c5f844" noncomputable s...
Mathlib/MeasureTheory/Constructions/Prod/Integral.lean
537
538
theorem integral_fun_snd (f : β → E) : ∫ z, f z.2 ∂μ.prod ν = (μ univ).toReal • ∫ y, f y ∂ν := by
simpa using integral_prod_smul (1 : α → ℝ) f
import Mathlib.Analysis.Convex.Cone.Extension import Mathlib.Analysis.NormedSpace.RCLike import Mathlib.Analysis.NormedSpace.Extend import Mathlib.Analysis.RCLike.Lemmas #align_import analysis.normed_space.hahn_banach.extension from "leanprover-community/mathlib"@"915591b2bb3ea303648db07284a161a7f2a9e3d4" univers...
Mathlib/Analysis/NormedSpace/HahnBanach/Extension.lean
44
59
theorem exists_extension_norm_eq (p : Subspace ℝ E) (f : p →L[ℝ] ℝ) : ∃ g : E →L[ℝ] ℝ, (∀ x : p, g x = f x) ∧ ‖g‖ = ‖f‖ := by
rcases exists_extension_of_le_sublinear ⟨p, f⟩ (fun x => ‖f‖ * ‖x‖) (fun c hc x => by simp only [norm_smul c x, Real.norm_eq_abs, abs_of_pos hc, mul_left_comm]) (fun x y => by -- Porting note: placeholder filled here rw [← left_distrib] exact mul_le_mul_of_nonneg_left (norm_add_le x y) (@...
import Mathlib.Logic.Pairwise import Mathlib.Order.CompleteBooleanAlgebra import Mathlib.Order.Directed import Mathlib.Order.GaloisConnection #align_import data.set.lattice from "leanprover-community/mathlib"@"b86832321b586c6ac23ef8cdef6a7a27e42b13bd" open Function Set universe u variable {α β γ : Type*} {ι ι' ι...
Mathlib/Data/Set/Lattice.lean
1,723
1,730
theorem image_sUnion {f : α → β} {s : Set (Set α)} : (f '' ⋃₀ s) = ⋃₀ (image f '' s) := by
ext b simp only [mem_image, mem_sUnion, exists_prop, sUnion_image, mem_iUnion] constructor · rintro ⟨a, ⟨t, ht₁, ht₂⟩, rfl⟩ exact ⟨t, ht₁, a, ht₂, rfl⟩ · rintro ⟨t, ht₁, a, ht₂, rfl⟩ exact ⟨a, ⟨t, ht₁, ht₂⟩, rfl⟩
import Mathlib.Init.ZeroOne import Mathlib.Data.Set.Defs import Mathlib.Order.Basic import Mathlib.Order.SymmDiff import Mathlib.Tactic.Tauto import Mathlib.Tactic.ByContra import Mathlib.Util.Delaborators #align_import data.set.basic from "leanprover-community/mathlib"@"001ffdc42920050657fd45bd2b8bfbec8eaaeb29" ...
Mathlib/Data/Set/Basic.lean
1,916
1,917
theorem subset_insert_diff_singleton (x : α) (s : Set α) : s ⊆ insert x (s \ {x}) := by
rw [← diff_singleton_subset_iff]
import Mathlib.CategoryTheory.Monoidal.Mon_ import Mathlib.CategoryTheory.Monoidal.Braided.Opposite import Mathlib.CategoryTheory.Monoidal.Transport import Mathlib.CategoryTheory.Monoidal.CoherenceLemmas import Mathlib.CategoryTheory.Limits.Shapes.Terminal universe v₁ v₂ u₁ u₂ u open CategoryTheory MonoidalCategor...
Mathlib/CategoryTheory/Monoidal/Comon_.lean
73
74
theorem counit_comul_hom {Z : C} (f : M.X ⟶ Z) : M.comul ≫ (M.counit ⊗ f) = f ≫ (λ_ Z).inv := by
rw [leftUnitor_inv_naturality, tensorHom_def, counit_comul_assoc]
import Mathlib.Algebra.MvPolynomial.PDeriv import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Derivative import Mathlib.Data.Nat.Choose.Sum import Mathlib.LinearAlgebra.LinearIndependent import Mathlib.RingTheory.Polynomial.Pochhammer #align_import ring_theory.polynomial.bernstein from "le...
Mathlib/RingTheory/Polynomial/Bernstein.lean
141
143
theorem derivative_zero (n : ℕ) : Polynomial.derivative (bernsteinPolynomial R n 0) = -n * bernsteinPolynomial R (n - 1) 0 := by
simp [bernsteinPolynomial, Polynomial.derivative_pow]
import Mathlib.Algebra.Polynomial.Degree.Definitions import Mathlib.Algebra.Polynomial.Induction #align_import data.polynomial.eval from "leanprover-community/mathlib"@"728baa2f54e6062c5879a3e397ac6bac323e506f" set_option linter.uppercaseLean3 false noncomputable section open Finset AddMonoidAlgebra open Polyn...
Mathlib/Algebra/Polynomial/Eval.lean
65
65
theorem eval₂_zero : (0 : R[X]).eval₂ f x = 0 := by
simp [eval₂_eq_sum]
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
377
381
theorem eventually_mem_of_tendsto_nhdsWithin {f : β → α} {a : α} {s : Set α} {l : Filter β} (h : Tendsto f l (𝓝[s] a)) : ∀ᶠ i in l, f i ∈ s := by
simp_rw [nhdsWithin_eq, tendsto_iInf, mem_setOf_eq, tendsto_principal, mem_inter_iff, eventually_and] at h exact (h univ ⟨mem_univ a, isOpen_univ⟩).2
import Mathlib.RepresentationTheory.Action.Limits import Mathlib.RepresentationTheory.Action.Concrete import Mathlib.CategoryTheory.Monoidal.FunctorCategory import Mathlib.CategoryTheory.Monoidal.Transport import Mathlib.CategoryTheory.Monoidal.Rigid.OfEquivalence import Mathlib.CategoryTheory.Monoidal.Rigid.FunctorCa...
Mathlib/RepresentationTheory/Action/Monoidal.lean
119
121
theorem rightUnitor_inv_hom {X : Action V G} : Hom.hom (ρ_ X).inv = (ρ_ X.V).inv := by
dsimp simp
import Mathlib.RingTheory.TensorProduct.Basic #align_import algebra.module.bimodule from "leanprover-community/mathlib"@"58cef51f7a819e7227224461e392dee423302f2d" open TensorProduct attribute [local instance] TensorProduct.Algebra.module namespace Subbimodule section Algebra variable {R A B M : Type*} variabl...
Mathlib/Algebra/Module/Bimodule.lean
90
92
theorem smul_mem (p : Submodule (A ⊗[R] B) M) (a : A) {m : M} (hm : m ∈ p) : a • m ∈ p := by
suffices a • m = a ⊗ₜ[R] (1 : B) • m by exact this.symm ▸ p.smul_mem _ hm simp [TensorProduct.Algebra.smul_def]
import Mathlib.CategoryTheory.Limits.Shapes.Pullbacks import Mathlib.CategoryTheory.Limits.Preserves.Basic #align_import category_theory.limits.preserves.shapes.pullbacks from "leanprover-community/mathlib"@"f11e306adb9f2a393539d2bb4293bf1b42caa7ac" noncomputable section universe v₁ v₂ u₁ u₂ -- Porting note: ne...
Mathlib/CategoryTheory/Limits/Preserves/Shapes/Pullbacks.lean
120
122
theorem PreservesPullback.iso_hom_fst : (PreservesPullback.iso G f g).hom ≫ pullback.fst = G.map pullback.fst := by
simp [PreservesPullback.iso]
import Mathlib.Analysis.SpecialFunctions.Exp import Mathlib.Tactic.Positivity.Core import Mathlib.Algebra.Ring.NegOnePow #align_import analysis.special_functions.trigonometric.basic from "leanprover-community/mathlib"@"2c1d8ca2812b64f88992a5294ea3dba144755cd1" noncomputable section open scoped Classical open Top...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Basic.lean
1,296
1,296
theorem sin_add_pi_div_two (x : ℂ) : sin (x + π / 2) = cos x := by
simp [sin_add]
import Mathlib.Tactic.NormNum import Mathlib.Tactic.TryThis import Mathlib.Util.AtomM set_option autoImplicit true namespace Mathlib.Tactic.Abel open Lean Elab Meta Tactic Qq initialize registerTraceClass `abel initialize registerTraceClass `abel.detail structure Context where α : Expr univ :...
Mathlib/Tactic/Abel.lean
210
211
theorem zero_smul {α} [AddCommMonoid α] (c) : smul c (0 : α) = 0 := by
simp [smul, nsmul_zero]
import Mathlib.Data.Set.Subsingleton import Mathlib.Order.WithBot #align_import data.set.image from "leanprover-community/mathlib"@"001ffdc42920050657fd45bd2b8bfbec8eaaeb29" universe u v open Function Set namespace Set variable {α β γ : Type*} {ι ι' : Sort*} section Image variable {f : α → β} {s t : Set...
Mathlib/Data/Set/Image.lean
361
363
theorem mem_compl_image [BooleanAlgebra α] (t : α) (S : Set α) : t ∈ HasCompl.compl '' S ↔ tᶜ ∈ S := by
simp [← preimage_compl_eq_image_compl]
import Mathlib.Data.Set.Function import Mathlib.Logic.Equiv.Defs import Mathlib.Tactic.Says #align_import logic.equiv.set from "leanprover-community/mathlib"@"aba57d4d3dae35460225919dcd82fe91355162f9" open Function Set universe u v w z variable {α : Sort u} {β : Sort v} {γ : Sort w} namespace Equiv @[simp] th...
Mathlib/Logic/Equiv/Set.lean
163
165
theorem prod_assoc_image {α β γ} {s : Set α} {t : Set β} {u : Set γ} : Equiv.prodAssoc α β γ '' (s ×ˢ t) ×ˢ u = s ×ˢ t ×ˢ u := by
simpa only [Equiv.image_eq_preimage] using prod_assoc_symm_preimage
import Mathlib.RingTheory.Localization.AtPrime import Mathlib.RingTheory.Localization.Basic import Mathlib.RingTheory.Localization.FractionRing #align_import ring_theory.localization.localization_localization from "leanprover-community/mathlib"@"831c494092374cfe9f50591ed0ac81a25efc5b86" open Function namespace ...
Mathlib/RingTheory/Localization/LocalizationLocalization.lean
66
70
theorem localization_localization_map_units [IsLocalization N T] (y : localizationLocalizationSubmodule M N) : IsUnit (algebraMap R T y) := by
obtain ⟨y', z, eq⟩ := mem_localizationLocalizationSubmodule.mp y.prop rw [IsScalarTower.algebraMap_apply R S T, eq, RingHom.map_mul, IsUnit.mul_iff] exact ⟨IsLocalization.map_units T y', (IsLocalization.map_units _ z).map (algebraMap S T)⟩
import Mathlib.Algebra.Order.Archimedean import Mathlib.Order.Filter.AtTopBot import Mathlib.Tactic.GCongr #align_import order.filter.archimedean from "leanprover-community/mathlib"@"8631e2d5ea77f6c13054d9151d82b83069680cb1" variable {α R : Type*} open Filter Set Function @[simp] theorem Nat.comap_cast_atTop [S...
Mathlib/Order/Filter/Archimedean.lean
193
205
theorem Tendsto.const_mul_atTop' (hr : 0 < r) (hf : Tendsto f l atTop) : Tendsto (fun x => r * f x) l atTop := by
refine tendsto_atTop.2 fun b => ?_ obtain ⟨n : ℕ, hn : 1 ≤ n • r⟩ := Archimedean.arch 1 hr rw [nsmul_eq_mul'] at hn filter_upwards [tendsto_atTop.1 hf (n * max b 0)] with x hx calc b ≤ 1 * max b 0 := by { rw [one_mul] exact le_max_left _ _ } _ ≤ r * n * max b 0 := by gcongr _ = r * (n *...
import Mathlib.Topology.Maps import Mathlib.Topology.NhdsSet #align_import topology.constructions from "leanprover-community/mathlib"@"f7ebde7ee0d1505dfccac8644ae12371aa3c1c9f" noncomputable section open scoped Classical open Topology TopologicalSpace Set Filter Function universe u v variable {X : Type u} {Y :...
Mathlib/Topology/Constructions.lean
733
738
theorem prod_induced_induced (f : X → Y) (g : Z → W) : @instTopologicalSpaceProd X Z (induced f ‹_›) (induced g ‹_›) = induced (fun p => (f p.1, g p.2)) instTopologicalSpaceProd := by
delta instTopologicalSpaceProd simp_rw [induced_inf, induced_compose] rfl
import Mathlib.Algebra.ModEq import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Order.Archimedean import Mathlib.Algebra.Periodic import Mathlib.Data.Int.SuccPred import Mathlib.GroupTheory.QuotientGroup import Mathlib.Order.Circular import Mathlib.Data.List.TFAE import Mathlib.Data.Set.Lattice #align_import a...
Mathlib/Algebra/Order/ToIntervalMod.lean
525
526
theorem toIocMod_sub (a b : α) : toIocMod hp a (b - p) = toIocMod hp a b := by
simpa only [one_zsmul] using toIocMod_sub_zsmul hp a b 1
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
514
525
theorem isCauSeq_nthHom (r : R) : IsCauSeq (padicNorm p) fun n => nthHom f r n := by
intro ε hε obtain ⟨k, hk⟩ : ∃ k : ℕ, (p : ℚ) ^ (-((k : ℕ) : ℤ)) < ε := exists_pow_neg_lt_rat p hε use k intro j hj refine lt_of_le_of_lt ?_ hk -- Need to do beta reduction first, as `norm_cast` doesn't. -- Added to adapt to leanprover/lean4#2734. beta_reduce norm_cast rw [← padicNorm.dvd_iff_norm_l...
import Mathlib.Combinatorics.SimpleGraph.Init import Mathlib.Data.Rel import Mathlib.Data.Set.Finite import Mathlib.Data.Sym.Sym2 #align_import combinatorics.simple_graph.basic from "leanprover-community/mathlib"@"3365b20c2ffa7c35e47e5209b89ba9abdddf3ffe" -- Porting note: using `aesop` for automation -- Porting n...
Mathlib/Combinatorics/SimpleGraph/Basic.lean
318
320
theorem iInf_adj_of_nonempty [Nonempty ι] {f : ι → SimpleGraph V} : (⨅ i, f i).Adj a b ↔ ∀ i, (f i).Adj a b := by
rw [iInf, sInf_adj_of_nonempty (Set.range_nonempty _), Set.forall_mem_range]
import Mathlib.Data.Fintype.Option import Mathlib.Data.Fintype.Perm import Mathlib.Data.Fintype.Prod import Mathlib.GroupTheory.Perm.Sign import Mathlib.Logic.Equiv.Option #align_import group_theory.perm.option from "leanprover-community/mathlib"@"c3019c79074b0619edb4b27553a91b2e82242395" open Equiv @[simp] theo...
Mathlib/GroupTheory/Perm/Option.lean
27
34
theorem Equiv.optionCongr_swap {α : Type*} [DecidableEq α] (x y : α) : optionCongr (swap x y) = swap (some x) (some y) := by
ext (_ | i) · simp [swap_apply_of_ne_of_ne] · by_cases hx : i = x · simp only [hx, optionCongr_apply, Option.map_some', swap_apply_left, Option.mem_def, Option.some.injEq] by_cases hy : i = y <;> simp [hx, hy, swap_apply_of_ne_of_ne]
import Mathlib.Order.Hom.Basic import Mathlib.Order.BoundedOrder #align_import order.hom.bounded from "leanprover-community/mathlib"@"f1a2caaf51ef593799107fe9a8d5e411599f3996" open Function OrderDual variable {F α β γ δ : Type*} structure TopHom (α β : Type*) [Top α] [Top β] where toFun : α → β map_t...
Mathlib/Order/Hom/Bounded.lean
146
149
theorem map_eq_top_iff [LE α] [OrderTop α] [PartialOrder β] [OrderTop β] [OrderIsoClass F α β] (f : F) {a : α} : f a = ⊤ ↔ a = ⊤ := by
letI : TopHomClass F α β := OrderIsoClass.toTopHomClass rw [← map_top f, (EquivLike.injective f).eq_iff]
import Mathlib.MeasureTheory.Constructions.Prod.Basic import Mathlib.MeasureTheory.Integral.DominatedConvergence import Mathlib.MeasureTheory.Integral.SetIntegral #align_import measure_theory.constructions.prod.integral from "leanprover-community/mathlib"@"fd5edc43dc4f10b85abfe544b88f82cf13c5f844" noncomputable s...
Mathlib/MeasureTheory/Constructions/Prod/Integral.lean
511
520
theorem integral_prod_smul {𝕜 : Type*} [RCLike 𝕜] [NormedSpace 𝕜 E] (f : α → 𝕜) (g : β → E) : ∫ z, f z.1 • g z.2 ∂μ.prod ν = (∫ x, f x ∂μ) • ∫ y, g y ∂ν := by
by_cases hE : CompleteSpace E; swap; · simp [integral, hE] by_cases h : Integrable (fun z : α × β => f z.1 • g z.2) (μ.prod ν) · rw [integral_prod _ h] simp_rw [integral_smul, integral_smul_const] have H : ¬Integrable f μ ∨ ¬Integrable g ν := by contrapose! h exact h.1.prod_smul h.2 cases' H with...
import Mathlib.RingTheory.Algebraic import Mathlib.RingTheory.Localization.AtPrime import Mathlib.RingTheory.Localization.Integral #align_import ring_theory.ideal.over from "leanprover-community/mathlib"@"198cb64d5c961e1a8d0d3e219feb7058d5353861" variable {R : Type*} [CommRing R] namespace Ideal open Polynomial...
Mathlib/RingTheory/Ideal/Over.lean
77
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theorem injective_quotient_le_comap_map (P : Ideal R[X]) : Function.Injective <| Ideal.quotientMap (Ideal.map (Polynomial.mapRingHom (Quotient.mk (P.comap (C : R →+* R[X])))) P) (Polynomial.mapRingHom (Ideal.Quotient.mk (P.comap (C : R →+* R[X])))) le_comap_map := by
refine quotientMap_injective' (le_of_eq ?_) rw [comap_map_of_surjective (mapRingHom (Ideal.Quotient.mk (P.comap (C : R →+* R[X])))) (map_surjective (Ideal.Quotient.mk (P.comap (C : R →+* R[X]))) Ideal.Quotient.mk_surjective)] refine le_antisymm (sup_le le_rfl ?_) (le_sup_of_le_left le_rfl) refine fun p h...
import Mathlib.Topology.MetricSpace.PiNat import Mathlib.Topology.MetricSpace.Isometry import Mathlib.Topology.MetricSpace.Gluing import Mathlib.Topology.Sets.Opens import Mathlib.Analysis.Normed.Field.Basic #align_import topology.metric_space.polish from "leanprover-community/mathlib"@"bcfa726826abd57587355b4b5b7e78...
Mathlib/Topology/MetricSpace/Polish.lean
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theorem complete_polishSpaceMetric (α : Type*) [ht : TopologicalSpace α] [h : PolishSpace α] : @CompleteSpace α (polishSpaceMetric α).toUniformSpace := by
convert h.complete.choose_spec.2 exact MetricSpace.replaceTopology_eq _ _
import Mathlib.Combinatorics.Quiver.Path import Mathlib.Combinatorics.Quiver.Push #align_import combinatorics.quiver.symmetric from "leanprover-community/mathlib"@"706d88f2b8fdfeb0b22796433d7a6c1a010af9f2" universe v u w v' namespace Quiver -- Porting note: no hasNonemptyInstance linter yet def Symmetrify (V : ...
Mathlib/Combinatorics/Quiver/Symmetric.lean
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theorem Path.reverse_comp [HasReverse V] {a b c : V} (p : Path a b) (q : Path b c) : (p.comp q).reverse = q.reverse.comp p.reverse := by
induction' q with _ _ _ _ h · simp · simp [h]
import Mathlib.Order.Filter.Basic import Mathlib.Data.PFun #align_import order.filter.partial from "leanprover-community/mathlib"@"b363547b3113d350d053abdf2884e9850a56b205" universe u v w namespace Filter variable {α : Type u} {β : Type v} {γ : Type w} open Filter def rmap (r : Rel α β) (l : Filter α) : F...
Mathlib/Order/Filter/Partial.lean
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theorem ptendsto'_of_ptendsto {f : α →. β} {l₁ : Filter α} {l₂ : Filter β} (h : f.Dom ∈ l₁) : PTendsto f l₁ l₂ → PTendsto' f l₁ l₂ := by
rw [ptendsto_def, ptendsto'_def] intro h' s sl₂ rw [PFun.preimage_eq] exact inter_mem (h' s sl₂) h
import Mathlib.Data.Matrix.Basic #align_import data.matrix.block from "leanprover-community/mathlib"@"c060baa79af5ca092c54b8bf04f0f10592f59489" variable {l m n o p q : Type*} {m' n' p' : o → Type*} variable {R : Type*} {S : Type*} {α : Type*} {β : Type*} open Matrix namespace Matrix theorem dotProduct_block [F...
Mathlib/Data/Matrix/Block.lean
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theorem fromBlocks_multiply [Fintype l] [Fintype m] [NonUnitalNonAssocSemiring α] (A : Matrix n l α) (B : Matrix n m α) (C : Matrix o l α) (D : Matrix o m α) (A' : Matrix l p α) (B' : Matrix l q α) (C' : Matrix m p α) (D' : Matrix m q α) : fromBlocks A B C D * fromBlocks A' B' C' D' = fromBlocks (A * ...
ext i j rcases i with ⟨⟩ <;> rcases j with ⟨⟩ <;> simp only [fromBlocks, mul_apply, of_apply, Sum.elim_inr, Fintype.sum_sum_type, Sum.elim_inl, add_apply]
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.Analysis.Calculus.FDeriv.Mul import Mathlib.Analysis.Calculus.FDeriv.Add #align_import analysis.calculus.deriv.mul from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w noncomputable section open scoped Classical...
Mathlib/Analysis/Calculus/Deriv/Mul.lean
447
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theorem HasStrictDerivAt.clm_comp (hc : HasStrictDerivAt c c' x) (hd : HasStrictDerivAt d d' x) : HasStrictDerivAt (fun y => (c y).comp (d y)) (c'.comp (d x) + (c x).comp d') x := by
have := (hc.hasStrictFDerivAt.clm_comp hd.hasStrictFDerivAt).hasStrictDerivAt rwa [add_apply, comp_apply, comp_apply, smulRight_apply, smulRight_apply, one_apply, one_smul, one_smul, add_comm] at this
import Mathlib.Geometry.Manifold.MFDeriv.FDeriv noncomputable section open scoped Manifold open Bundle Set Topology section SpecificFunctions variable {𝕜 : Type*} [NontriviallyNormedField 𝕜] {E : Type*} [NormedAddCommGroup E] [NormedSpace 𝕜 E] {H : Type*} [TopologicalSpace H] (I : ModelWithCorners 𝕜 E H)...
Mathlib/Geometry/Manifold/MFDeriv/SpecificFunctions.lean
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theorem tangentMap_prod_snd {p : TangentBundle (I.prod I') (M × M')} : tangentMap (I.prod I') I' Prod.snd p = ⟨p.proj.2, p.2.2⟩ := by
-- Porting note: `rfl` wasn't needed simp [tangentMap]; rfl
import Mathlib.NumberTheory.Cyclotomic.Discriminant import Mathlib.RingTheory.Polynomial.Eisenstein.IsIntegral import Mathlib.RingTheory.Ideal.Norm #align_import number_theory.cyclotomic.rat from "leanprover-community/mathlib"@"b353176c24d96c23f0ce1cc63efc3f55019702d9" universe u open Algebra IsCyclotomicExtensio...
Mathlib/NumberTheory/Cyclotomic/Rat.lean
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theorem isIntegralClosure_adjoin_singleton_of_prime [hcycl : IsCyclotomicExtension {p} ℚ K] (hζ : IsPrimitiveRoot ζ ↑p) : IsIntegralClosure (adjoin ℤ ({ζ} : Set K)) ℤ K := by
rw [← pow_one p] at hζ hcycl exact isIntegralClosure_adjoin_singleton_of_prime_pow hζ
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Data.Complex.Exponential import Mathlib.Data.Complex.Module import Mathlib.RingTheory.Polynomial.Chebyshev #align_import analysis.special_functions.trigonometric.chebyshev from "leanprover-community/mathlib"@"2c1d8ca2812b64f88992a5294ea3dba144755cd1" set_...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Chebyshev.lean
39
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theorem algebraMap_eval_T (x : R) (n : ℤ) : algebraMap R A ((T R n).eval x) = (T A n).eval (algebraMap R A x) := by
rw [← aeval_algebraMap_apply_eq_algebraMap_eval, aeval_T]
import Mathlib.AlgebraicGeometry.PrimeSpectrum.Basic import Mathlib.RingTheory.Localization.AsSubring #align_import algebraic_geometry.prime_spectrum.maximal from "leanprover-community/mathlib"@"052f6013363326d50cb99c6939814a4b8eb7b301" noncomputable section open scoped Classical universe u v variable (R : Typ...
Mathlib/AlgebraicGeometry/PrimeSpectrum/Maximal.lean
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theorem toPrimeSpectrum_range : Set.range (@toPrimeSpectrum R _) = { x | IsClosed ({x} : Set <| PrimeSpectrum R) } := by
simp only [isClosed_singleton_iff_isMaximal] ext ⟨x, _⟩ exact ⟨fun ⟨y, hy⟩ => hy ▸ y.IsMaximal, fun hx => ⟨⟨x, hx⟩, rfl⟩⟩
import Mathlib.Algebra.DirectSum.Module import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.Convex.Uniform import Mathlib.Analysis.NormedSpace.Completion import Mathlib.Analysis.NormedSpace.BoundedLinearMaps #align_import analysis.inner_product_space.basic from "leanprover-community/mathlib"@"3f655f5297b030...
Mathlib/Analysis/InnerProductSpace/Basic.lean
232
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theorem inner_im_symm (x y : F) : im ⟪x, y⟫ = -im ⟪y, x⟫ := by
rw [← inner_conj_symm, conj_im]
import Mathlib.Order.Heyting.Basic #align_import order.boolean_algebra from "leanprover-community/mathlib"@"9ac7c0c8c4d7a535ec3e5b34b8859aab9233b2f4" open Function OrderDual universe u v variable {α : Type u} {β : Type*} {w x y z : α} class GeneralizedBooleanAlgebra (α : Type u) extends DistribLattice α, S...
Mathlib/Order/BooleanAlgebra.lean
486
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theorem sup_lt_of_lt_sdiff_left (h : y < z \ x) (hxz : x ≤ z) : x ⊔ y < z := by
rw [← sup_sdiff_cancel_right hxz] refine (sup_le_sup_left h.le _).lt_of_not_le fun h' => h.not_le ?_ rw [← sdiff_idem] exact (sdiff_le_sdiff_of_sup_le_sup_left h').trans sdiff_le
import Mathlib.Data.Finsupp.Defs #align_import data.finsupp.fin from "leanprover-community/mathlib"@"f7fc89d5d5ff1db2d1242c7bb0e9062ce47ef47c" noncomputable section namespace Finsupp variable {n : ℕ} (i : Fin n) {M : Type*} [Zero M] (y : M) (t : Fin (n + 1) →₀ M) (s : Fin n →₀ M) def tail (s : Fin (n + 1) →₀ ...
Mathlib/Data/Finsupp/Fin.lean
60
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theorem cons_tail : cons (t 0) (tail t) = t := by
ext a by_cases c_a : a = 0 · rw [c_a, cons_zero] · rw [← Fin.succ_pred a c_a, cons_succ, ← tail_apply]
import Mathlib.Data.Set.Pointwise.SMul #align_import algebra.add_torsor from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" class AddTorsor (G : outParam Type*) (P : Type*) [AddGroup G] extends AddAction G P, VSub G P where [nonempty : Nonempty P] vsub_vadd' : ∀ p₁ p₂ : P, (p₁ ...
Mathlib/Algebra/AddTorsor.lean
270
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theorem vsub_sub_vsub_comm (p₁ p₂ p₃ p₄ : P) : p₁ -ᵥ p₂ - (p₃ -ᵥ p₄) = p₁ -ᵥ p₃ - (p₂ -ᵥ p₄) := by
rw [← vsub_vadd_eq_vsub_sub, vsub_vadd_comm, vsub_vadd_eq_vsub_sub]
import Mathlib.Analysis.SpecialFunctions.Pow.Real import Mathlib.LinearAlgebra.FreeModule.PID import Mathlib.LinearAlgebra.Matrix.AbsoluteValue import Mathlib.NumberTheory.ClassNumber.AdmissibleAbsoluteValue import Mathlib.RingTheory.ClassGroup import Mathlib.RingTheory.DedekindDomain.IntegralClosure import Mathlib.Ri...
Mathlib/NumberTheory/ClassNumber/Finite.lean
273
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theorem prod_finsetApprox_ne_zero : algebraMap R S (∏ m ∈ finsetApprox bS adm, m) ≠ 0 := by
refine mt ((injective_iff_map_eq_zero _).mp bS.algebraMap_injective _) ?_ simp only [Finset.prod_eq_zero_iff, not_exists] rintro x ⟨hx, rfl⟩ exact finsetApprox.zero_not_mem bS adm hx
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
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theorem exists_degree_le_of_mem_span_of_finite {s : Set R[X]} (s_fin : s.Finite) (hs : s.Nonempty) : ∃ p' ∈ s, ∀ (p : R[X]), p ∈ Submodule.span R s → degree p ≤ degree p' := by
rcases Set.Finite.exists_maximal_wrt degree s s_fin hs with ⟨a, has, hmax⟩ refine ⟨a, has, fun p hp => ?_⟩ rcases exists_degree_le_of_mem_span hs hp with ⟨p', hp'⟩ by_cases h : degree a ≤ degree p' · rw [← hmax p' hp'.left h] at hp'; exact hp'.right · exact le_trans hp'.right (not_le.mp h).le
import Mathlib.Algebra.Polynomial.Degree.Definitions import Mathlib.Algebra.Polynomial.Induction #align_import data.polynomial.eval from "leanprover-community/mathlib"@"728baa2f54e6062c5879a3e397ac6bac323e506f" set_option linter.uppercaseLean3 false noncomputable section open Finset AddMonoidAlgebra open Polyn...
Mathlib/Algebra/Polynomial/Eval.lean
439
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theorem eval_monomial_one_add_sub [CommRing S] (d : ℕ) (y : S) : eval (1 + y) (monomial d (d + 1 : S)) - eval y (monomial d (d + 1 : S)) = ∑ x_1 ∈ range (d + 1), ↑((d + 1).choose x_1) * (↑x_1 * y ^ (x_1 - 1)) := by
have cast_succ : (d + 1 : S) = ((d.succ : ℕ) : S) := by simp only [Nat.cast_succ] rw [cast_succ, eval_monomial, eval_monomial, add_comm, add_pow] -- Porting note: `apply_congr` hadn't been ported yet, so `congr` & `ext` is used. conv_lhs => congr · congr · skip · congr · skip ...
import Mathlib.Analysis.Complex.Polynomial import Mathlib.NumberTheory.NumberField.Norm import Mathlib.NumberTheory.NumberField.Basic import Mathlib.RingTheory.Norm import Mathlib.Topology.Instances.Complex import Mathlib.RingTheory.RootsOfUnity.Basic #align_import number_theory.number_field.embeddings from "leanprov...
Mathlib/NumberTheory/NumberField/Embeddings.lean
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theorem range_eval_eq_rootSet_minpoly : (range fun φ : K →+* A => φ x) = (minpoly ℚ x).rootSet A := by
convert (NumberField.isAlgebraic K).range_eval_eq_rootSet_minpoly A x using 1 ext a exact ⟨fun ⟨φ, hφ⟩ => ⟨φ.toRatAlgHom, hφ⟩, fun ⟨φ, hφ⟩ => ⟨φ.toRingHom, hφ⟩⟩
import Mathlib.Init.Function import Mathlib.Init.Order.Defs #align_import data.bool.basic from "leanprover-community/mathlib"@"c4658a649d216f57e99621708b09dcb3dcccbd23" namespace Bool @[deprecated (since := "2024-06-07")] alias decide_True := decide_true_eq_true #align bool.to_bool_true decide_true_eq_true @[dep...
Mathlib/Data/Bool/Basic.lean
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theorem ofNat_toNat (b : Bool) : ofNat (toNat b) = b := by
cases b <;> rfl
import Mathlib.Algebra.BigOperators.GroupWithZero.Finset import Mathlib.Algebra.Group.FiniteSupport import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Order.BigOperators.Group.Finset import Mathlib.Data.Set.Subsingleton #align_import algebra.big_operators.finprod from "leanprover-community/mathlib"@"d6fad0e5bf...
Mathlib/Algebra/BigOperators/Finprod.lean
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theorem finprod_eq_prod_plift_of_mulSupport_toFinset_subset {f : α → M} (hf : (mulSupport (f ∘ PLift.down)).Finite) {s : Finset (PLift α)} (hs : hf.toFinset ⊆ s) : ∏ᶠ i, f i = ∏ i ∈ s, f i.down := by
rw [finprod, dif_pos] refine Finset.prod_subset hs fun x _ hxf => ?_ rwa [hf.mem_toFinset, nmem_mulSupport] at hxf
import Mathlib.Algebra.ContinuedFractions.Computation.CorrectnessTerminating import Mathlib.Algebra.Order.Group.Basic import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Data.Nat.Fib.Basic import Mathlib.Tactic.Monotonicity #align_import algebra.continued_fractions.computation.approximations from "leanprover-commu...
Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean
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theorem succ_nth_stream_b_le_nth_stream_fr_inv {ifp_n ifp_succ_n : IntFractPair K} (nth_stream_eq : IntFractPair.stream v n = some ifp_n) (succ_nth_stream_eq : IntFractPair.stream v (n + 1) = some ifp_succ_n) : (ifp_succ_n.b : K) ≤ ifp_n.fr⁻¹ := by
suffices (⌊ifp_n.fr⁻¹⌋ : K) ≤ ifp_n.fr⁻¹ by cases' ifp_n with _ ifp_n_fr have : ifp_n_fr ≠ 0 := by intro h simp [h, IntFractPair.stream, nth_stream_eq] at succ_nth_stream_eq have : IntFractPair.of ifp_n_fr⁻¹ = ifp_succ_n := by simpa [this, IntFractPair.stream, nth_stream_eq, Option.coe_...
import Mathlib.Data.List.Count import Mathlib.Data.List.Dedup import Mathlib.Data.List.InsertNth import Mathlib.Data.List.Lattice import Mathlib.Data.List.Permutation import Mathlib.Data.Nat.Factorial.Basic #align_import data.list.perm from "leanprover-community/mathlib"@"65a1391a0106c9204fe45bc73a039f056558cb83" ...
Mathlib/Data/List/Perm.lean
718
726
theorem Perm.permutations' {s t : List α} (p : s ~ t) : permutations' s ~ permutations' t := by
induction' p with a s t _ IH a b l s t u _ _ IH₁ IH₂; · simp · exact IH.bind_right _ · dsimp rw [bind_assoc, bind_assoc] apply Perm.bind_left intro l' _ apply perm_permutations'Aux_comm · exact IH₁.trans IH₂
import Mathlib.Algebra.Polynomial.Eval import Mathlib.Analysis.Asymptotics.Asymptotics import Mathlib.Analysis.Normed.Order.Basic import Mathlib.Topology.Algebra.Order.LiminfLimsup #align_import analysis.asymptotics.superpolynomial_decay from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" ...
Mathlib/Analysis/Asymptotics/SuperpolynomialDecay.lean
116
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theorem SuperpolynomialDecay.param_pow_mul (hf : SuperpolynomialDecay l k f) (n : ℕ) : SuperpolynomialDecay l k (k ^ n * f) := by
induction' n with n hn · simpa only [Nat.zero_eq, one_mul, pow_zero] using hf · simpa only [pow_succ', mul_assoc] using hn.param_mul
import Mathlib.NumberTheory.Zsqrtd.Basic import Mathlib.RingTheory.PrincipalIdealDomain import Mathlib.Data.Complex.Basic import Mathlib.Data.Real.Archimedean #align_import number_theory.zsqrtd.gaussian_int from "leanprover-community/mathlib"@"5b2fe80501ff327b9109fb09b7cc8c325cd0d7d9" open Zsqrtd Complex open sc...
Mathlib/NumberTheory/Zsqrtd/GaussianInt.lean
174
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theorem norm_eq_zero {x : ℤ[i]} : norm x = 0 ↔ x = 0 := by
rw [← @Int.cast_inj ℝ _ _ _]; simp
import Mathlib.Algebra.Group.Embedding import Mathlib.Data.Fin.Basic import Mathlib.Data.Finset.Union #align_import data.finset.image from "leanprover-community/mathlib"@"65a1391a0106c9204fe45bc73a039f056558cb83" -- TODO -- assert_not_exists OrderedCommMonoid assert_not_exists MonoidWithZero assert_not_exists MulA...
Mathlib/Data/Finset/Image.lean
304
305
theorem disjoint_range_addLeftEmbedding (a b : ℕ) : Disjoint (range a) (map (addLeftEmbedding a) (range b)) := by
simp [disjoint_left]; omega
import Mathlib.Data.Fintype.BigOperators import Mathlib.Data.Finsupp.Defs import Mathlib.Data.Nat.Cast.Order import Mathlib.Data.Set.Countable import Mathlib.Logic.Small.Set import Mathlib.Order.SuccPred.CompleteLinearOrder import Mathlib.SetTheory.Cardinal.SchroederBernstein #align_import set_theory.cardinal.basic f...
Mathlib/SetTheory/Cardinal/Basic.lean
570
570
theorem mk_Prop : #Prop = 2 := by
simp
import Mathlib.Analysis.Calculus.ContDiff.Basic import Mathlib.Analysis.Calculus.Deriv.Pow #align_import analysis.special_functions.sqrt from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Set open scoped Topology namespace Real noncomputable def sqPartialHomeomorph : PartialHo...
Mathlib/Analysis/SpecialFunctions/Sqrt.lean
46
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theorem deriv_sqrt_aux {x : ℝ} (hx : x ≠ 0) : HasStrictDerivAt (√·) (1 / (2 * √x)) x ∧ ∀ n, ContDiffAt ℝ n (√·) x := by
cases' hx.lt_or_lt with hx hx · rw [sqrt_eq_zero_of_nonpos hx.le, mul_zero, div_zero] have : (√·) =ᶠ[𝓝 x] fun _ => 0 := (gt_mem_nhds hx).mono fun x hx => sqrt_eq_zero_of_nonpos hx.le exact ⟨(hasStrictDerivAt_const x (0 : ℝ)).congr_of_eventuallyEq this.symm, fun n => contDiffAt_const.congr_of...
import Mathlib.Algebra.CharP.Two import Mathlib.Algebra.CharP.Reduced import Mathlib.Algebra.NeZero import Mathlib.Algebra.Polynomial.RingDivision import Mathlib.GroupTheory.SpecificGroups.Cyclic import Mathlib.NumberTheory.Divisors import Mathlib.RingTheory.IntegralDomain import Mathlib.Tactic.Zify #align_import rin...
Mathlib/RingTheory/RootsOfUnity/Basic.lean
398
401
theorem coe_submonoidClass_iff {M B : Type*} [CommMonoid M] [SetLike B M] [SubmonoidClass B M] {N : B} {ζ : N} : IsPrimitiveRoot (ζ : M) k ↔ IsPrimitiveRoot ζ k := by
simp_rw [iff_def] norm_cast
import Mathlib.Data.Matrix.Basic import Mathlib.Data.Matrix.RowCol import Mathlib.Data.Fin.VecNotation import Mathlib.Tactic.FinCases #align_import data.matrix.notation from "leanprover-community/mathlib"@"a99f85220eaf38f14f94e04699943e185a5e1d1a" namespace Matrix universe u uₘ uₙ uₒ variable {α : Type u} {o n m...
Mathlib/Data/Matrix/Notation.lean
353
356
theorem cons_vecMulVec (x : α) (v : Fin m → α) (w : n' → α) : vecMulVec (vecCons x v) w = vecCons (x • w) (vecMulVec v w) := by
ext i refine Fin.cases ?_ ?_ i <;> simp [vecMulVec]
import Mathlib.Algebra.Order.Group.Basic import Mathlib.Algebra.Order.Ring.Abs import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Algebra.Ring.Nat import Mathlib.Data.ZMod.Basic import Mathlib.GroupTheory.OrderOfElement import Mathlib.RingTheory.Fintype import Mathlib.Tactic.IntervalCases #align_import number_the...
Mathlib/NumberTheory/LucasLehmer.lean
182
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theorem residue_eq_zero_iff_sMod_eq_zero (p : ℕ) (w : 1 < p) : lucasLehmerResidue p = 0 ↔ sMod p (p - 2) = 0 := by
dsimp [lucasLehmerResidue] rw [sZMod_eq_sMod p] constructor · -- We want to use that fact that `0 ≤ s_mod p (p-2) < 2^p - 1` -- and `lucas_lehmer_residue p = 0 → 2^p - 1 ∣ s_mod p (p-2)`. intro h simp? [ZMod.intCast_zmod_eq_zero_iff_dvd] at h says simp only [ZMod.intCast_zmod_eq_zero_iff_dvd,...
import Mathlib.Data.List.Basic namespace List variable {α β : Type*} @[simp] theorem reduceOption_cons_of_some (x : α) (l : List (Option α)) : reduceOption (some x :: l) = x :: l.reduceOption := by simp only [reduceOption, filterMap, id, eq_self_iff_true, and_self_iff] #align list.reduce_option_cons_of_some...
Mathlib/Data/List/ReduceOption.lean
88
90
theorem reduceOption_concat_of_some (l : List (Option α)) (x : α) : (l.concat (some x)).reduceOption = l.reduceOption.concat x := by
simp only [reduceOption_nil, concat_eq_append, reduceOption_append, reduceOption_cons_of_some]
import Mathlib.Data.ZMod.Quotient #align_import group_theory.complement from "leanprover-community/mathlib"@"6ca1a09bc9aa75824bf97388c9e3b441fc4ccf3f" open Set open scoped Pointwise namespace Subgroup variable {G : Type*} [Group G] (H K : Subgroup G) (S T : Set G) @[to_additive "`S` and `T` are complements if ...
Mathlib/GroupTheory/Complement.lean
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theorem IsComplement'.symm (h : IsComplement' H K) : IsComplement' K H := by
let ϕ : H × K ≃ K × H := Equiv.mk (fun x => ⟨x.2⁻¹, x.1⁻¹⟩) (fun x => ⟨x.2⁻¹, x.1⁻¹⟩) (fun x => Prod.ext (inv_inv _) (inv_inv _)) fun x => Prod.ext (inv_inv _) (inv_inv _) let ψ : G ≃ G := Equiv.mk (fun g : G => g⁻¹) (fun g : G => g⁻¹) inv_inv inv_inv suffices hf : (ψ ∘ fun x : H × K => x.1.1 * x.2.1) ...
import Mathlib.Data.Finset.Lattice #align_import order.irreducible from "leanprover-community/mathlib"@"bf2428c9486c407ca38b5b3fb10b87dad0bc99fa" open Finset OrderDual variable {ι α : Type*} section SemilatticeSup variable [SemilatticeSup α] {a b c : α} def SupIrred (a : α) : Prop := ¬IsMin a ∧ ∀ ⦃b c⦄,...
Mathlib/Order/Irreducible.lean
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theorem not_supPrime : ¬SupPrime a ↔ IsMin a ∨ ∃ b c, a ≤ b ⊔ c ∧ ¬a ≤ b ∧ ¬a ≤ c := by
rw [SupPrime, not_and_or]; push_neg; rfl
import Batteries.Data.Rat.Basic import Batteries.Tactic.SeqFocus namespace Rat theorem ext : {p q : Rat} → p.num = q.num → p.den = q.den → p = q | ⟨_,_,_,_⟩, ⟨_,_,_,_⟩, rfl, rfl => rfl @[simp] theorem mk_den_one {r : Int} : ⟨r, 1, Nat.one_ne_zero, (Nat.coprime_one_right _)⟩ = (r : Rat) := rfl @[simp] theor...
.lake/packages/batteries/Batteries/Data/Rat/Lemmas.lean
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theorem mkRat_mul_right {a : Nat} (a0 : a ≠ 0) : mkRat (n * a) (d * a) = mkRat n d := by
rw [← mkRat_mul_left (d := d) a0]; congr 1 <;> [apply Int.mul_comm; apply Nat.mul_comm]
import Mathlib.Analysis.SpecialFunctions.PolarCoord import Mathlib.Analysis.SpecialFunctions.Gamma.Basic open Real Set MeasureTheory MeasureTheory.Measure section real theorem integral_rpow_mul_exp_neg_rpow {p q : ℝ} (hp : 0 < p) (hq : - 1 < q) : ∫ x in Ioi (0:ℝ), x ^ q * exp (- x ^ p) = (1 / p) * Gamma ((q +...
Mathlib/MeasureTheory/Integral/Gamma.lean
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theorem integral_exp_neg_mul_rpow {p b : ℝ} (hp : 0 < p) (hb : 0 < b) : ∫ x in Ioi (0:ℝ), exp (- b * x ^ p) = b ^ (- 1 / p) * Gamma (1 / p + 1) := by
convert (integral_rpow_mul_exp_neg_mul_rpow hp neg_one_lt_zero hb) using 1 · simp_rw [rpow_zero, one_mul] · rw [zero_add, Gamma_add_one (one_div_ne_zero (ne_of_gt hp)), mul_assoc]
import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.MeasureTheory.Measure.GiryMonad #align_import probability.kernel.basic from "leanprover-community/mathlib"@"fd5edc43dc4f10b85abfe544b88f82cf13c5f844" open MeasureTheory open scoped MeasureTheory ENNReal NNReal namespace ProbabilityTheory noncomputab...
Mathlib/Probability/Kernel/Basic.lean
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theorem finset_sum_apply (I : Finset ι) (κ : ι → kernel α β) (a : α) : (∑ i ∈ I, κ i) a = ∑ i ∈ I, κ i a := by
rw [coe_finset_sum, Finset.sum_apply]