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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
226
228
theorem vars_monomial_single (i : σ) {e : ℕ} {r : R} (he : e ≠ 0) (hr : r ≠ 0) : (monomial (Finsupp.single i e) r).vars = {i} := by
rw [vars_monomial hr, Finsupp.support_single_ne_zero _ he]
import Mathlib.FieldTheory.Perfect #align_import field_theory.perfect_closure from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" universe u v open Function section variable (K : Type u) [CommRing K] (p : ℕ) [Fact p.Prime] [CharP K p] @[mk_iff] inductive PerfectClosure.R : ℕ × K → ℕ...
Mathlib/FieldTheory/PerfectClosure.lean
328
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theorem mk_eq_iff (x y : ℕ × K) : mk K p x = mk K p y ↔ ∃ z, (frobenius K p)^[y.1 + z] x.2 = (frobenius K p)^[x.1 + z] y.2 := by
constructor · intro H replace H := Quot.exact _ H induction H with | rel x y H => cases' H with n x; exact ⟨0, rfl⟩ | refl H => exact ⟨0, rfl⟩ | symm x y H ih => cases' ih with w ih; exact ⟨w, ih.symm⟩ | trans x y z H1 H2 ih1 ih2 => cases' ih1 with z1 ih1 cases' ih2 with z2 ih2 ...
import Mathlib.Topology.Algebra.GroupWithZero import Mathlib.Topology.Order.OrderClosed #align_import topology.algebra.with_zero_topology from "leanprover-community/mathlib"@"3e0c4d76b6ebe9dfafb67d16f7286d2731ed6064" open Topology Filter TopologicalSpace Filter Set Function namespace WithZeroTopology variable {α...
Mathlib/Topology/Algebra/WithZeroTopology.lean
128
129
theorem Iio_mem_nhds (h : γ₁ < γ₂) : Iio γ₂ ∈ 𝓝 γ₁ := by
rcases eq_or_ne γ₁ 0 with (rfl | h₀) <;> simp [*, h.ne', Iio_mem_nhds_zero]
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
118
121
theorem Path.cast_eq_iff_heq {u v u' v' : U} (hu : u = u') (hv : v = v') (p : Path u v) (p' : Path u' v') : p.cast hu hv = p' ↔ HEq p p' := by
rw [Path.cast_eq_cast] exact _root_.cast_eq_iff_heq
import Mathlib.Order.CompleteLattice import Mathlib.Order.GaloisConnection import Mathlib.Data.Set.Lattice import Mathlib.Tactic.AdaptationNote #align_import data.rel from "leanprover-community/mathlib"@"706d88f2b8fdfeb0b22796433d7a6c1a010af9f2" variable {α β γ : Type*} def Rel (α β : Type*) := α → β → Prop --...
Mathlib/Data/Rel.lean
91
93
theorem dom_inv : r.inv.dom = r.codom := by
ext x rfl
import Mathlib.Algebra.Order.Monoid.Unbundled.MinMax import Mathlib.Algebra.Order.Monoid.WithTop import Mathlib.Data.Finset.Image import Mathlib.Data.Multiset.Fold #align_import data.finset.fold from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" -- TODO: -- assert_not_exists OrderedComm...
Mathlib/Data/Finset/Fold.lean
267
270
theorem fold_max_add [Add β] [CovariantClass β β (Function.swap (· + ·)) (· ≤ ·)] (n : WithBot β) (s : Finset α) : (s.fold max ⊥ fun x : α => ↑(f x) + n) = s.fold max ⊥ ((↑) ∘ f) + n := by
classical induction' s using Finset.induction_on with a s _ ih <;> simp [*, max_add_add_right]
import Mathlib.Algebra.Order.Ring.Defs import Mathlib.Algebra.Group.Int import Mathlib.Data.Nat.Dist import Mathlib.Data.Ordmap.Ordnode import Mathlib.Tactic.Abel import Mathlib.Tactic.Linarith #align_import data.ordmap.ordset from "leanprover-community/mathlib"@"47b51515e69f59bca5cf34ef456e6000fe205a69" variable...
Mathlib/Data/Ordmap/Ordset.lean
321
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theorem dual_node3R (l : Ordnode α) (x : α) (m : Ordnode α) (y : α) (r : Ordnode α) : dual (node3R l x m y r) = node3L (dual r) y (dual m) x (dual l) := by
simp [node3L, node3R, dual_node', add_comm]
import Mathlib.Analysis.SpecialFunctions.Gaussian.GaussianIntegral import Mathlib.Analysis.Complex.CauchyIntegral import Mathlib.MeasureTheory.Integral.Pi import Mathlib.Analysis.Fourier.FourierTransform open Real Set MeasureTheory Filter Asymptotics intervalIntegral open scoped Real Topology FourierTransform Re...
Mathlib/Analysis/SpecialFunctions/Gaussian/FourierTransform.lean
51
55
theorem norm_cexp_neg_mul_sq_add_mul_I (b : ℂ) (c T : ℝ) : ‖cexp (-b * (T + c * I) ^ 2)‖ = exp (-(b.re * T ^ 2 - 2 * b.im * c * T - b.re * c ^ 2)) := by
rw [Complex.norm_eq_abs, Complex.abs_exp, neg_mul, neg_re, ← re_add_im b] simp only [sq, re_add_im, mul_re, mul_im, add_re, add_im, ofReal_re, ofReal_im, I_re, I_im] ring_nf
import Mathlib.Algebra.Homology.Homotopy import Mathlib.AlgebraicTopology.DoldKan.Notations #align_import algebraic_topology.dold_kan.homotopies from "leanprover-community/mathlib"@"b12099d3b7febf4209824444dd836ef5ad96db55" open CategoryTheory CategoryTheory.Category CategoryTheory.Limits CategoryTheory.Preadditi...
Mathlib/AlgebraicTopology/DoldKan/Homotopies.lean
104
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theorem hσ'_eq_zero {q n m : ℕ} (hnq : n < q) (hnm : c.Rel m n) : (hσ' q n m hnm : X _[n] ⟶ X _[m]) = 0 := by
simp only [hσ', hσ] split_ifs exact zero_comp
import Mathlib.CategoryTheory.Preadditive.AdditiveFunctor import Mathlib.CategoryTheory.Linear.Basic #align_import category_theory.linear.linear_functor from "leanprover-community/mathlib"@"829895f162a1f29d0133f4b3538f4cd1fb5bffd3" namespace CategoryTheory variable (R : Type*) [Semiring R] class Functor.Linear...
Mathlib/CategoryTheory/Linear/LinearFunctor.lean
53
54
theorem map_units_smul {X Y : C} (r : Rˣ) (f : X ⟶ Y) : F.map (r • f) = r • F.map f := by
apply map_smul
import Mathlib.Data.List.Basic #align_import data.list.infix from "leanprover-community/mathlib"@"26f081a2fb920140ed5bc5cc5344e84bcc7cb2b2" open Nat variable {α β : Type*} namespace List variable {l l₁ l₂ l₃ : List α} {a b : α} {m n : ℕ} section Fix #align list.prefix_append List.prefix_append #align list....
Mathlib/Data/List/Infix.lean
178
178
theorem tail_suffix (l : List α) : tail l <:+ l := by
rw [← drop_one]; apply drop_suffix
import Mathlib.Topology.EMetricSpace.Paracompact import Mathlib.Topology.Instances.ENNReal import Mathlib.Analysis.Convex.PartitionOfUnity #align_import topology.metric_space.partition_of_unity from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Topology ENNReal NNReal Filter Set Fu...
Mathlib/Topology/MetricSpace/PartitionOfUnity.lean
64
72
theorem exists_forall_closedBall_subset_aux₁ (hK : ∀ i, IsClosed (K i)) (hU : ∀ i, IsOpen (U i)) (hKU : ∀ i, K i ⊆ U i) (hfin : LocallyFinite K) (x : X) : ∃ r : ℝ, ∀ᶠ y in 𝓝 x, r ∈ Ioi (0 : ℝ) ∩ ENNReal.ofReal ⁻¹' ⋂ (i) (_ : y ∈ K i), { r | closedBall y r ⊆ U i } := by
have := (ENNReal.continuous_ofReal.tendsto' 0 0 ENNReal.ofReal_zero).eventually (eventually_nhds_zero_forall_closedBall_subset hK hU hKU hfin x).curry rcases this.exists_gt with ⟨r, hr0, hr⟩ refine ⟨r, hr.mono fun y hy => ⟨hr0, ?_⟩⟩ rwa [mem_preimage, mem_iInter₂]
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
337
341
theorem oangle_smul_smul_self_of_nonneg (x : V) {r₁ r₂ : ℝ} (hr₁ : 0 ≤ r₁) (hr₂ : 0 ≤ r₂) : o.oangle (r₁ • x) (r₂ • x) = 0 := by
rcases hr₁.lt_or_eq with (h | h) · simp [h, hr₂] · simp [h.symm]
import Mathlib.Order.Interval.Multiset #align_import data.nat.interval from "leanprover-community/mathlib"@"1d29de43a5ba4662dd33b5cfeecfc2a27a5a8a29" -- TODO -- assert_not_exists Ring open Finset Nat variable (a b c : ℕ) namespace Nat instance instLocallyFiniteOrder : LocallyFiniteOrder ℕ where finsetIcc a b...
Mathlib/Order/Interval/Finset/Nat.lean
205
211
theorem Ico_image_const_sub_eq_Ico (hac : a ≤ c) : ((Ico a b).image fun x => c - x) = Ico (c + 1 - b) (c + 1 - a) := by
ext x simp_rw [mem_image, mem_Ico] refine ⟨?_, fun h ↦ ⟨c - x, by omega⟩⟩ rintro ⟨x, hx, rfl⟩ omega
import Mathlib.Algebra.GroupWithZero.Indicator import Mathlib.Topology.ContinuousOn import Mathlib.Topology.Instances.ENNReal #align_import topology.semicontinuous from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Topology ENNReal open Set Function Filter variable {α : Type*} [...
Mathlib/Topology/Semicontinuous.lean
604
613
theorem lowerSemicontinuousWithinAt_sum {f : ι → α → γ} {a : Finset ι} (ha : ∀ i ∈ a, LowerSemicontinuousWithinAt (f i) s x) : LowerSemicontinuousWithinAt (fun z => ∑ i ∈ a, f i z) s x := by
classical induction' a using Finset.induction_on with i a ia IH · exact lowerSemicontinuousWithinAt_const · simp only [ia, Finset.sum_insert, not_false_iff] exact LowerSemicontinuousWithinAt.add (ha _ (Finset.mem_insert_self i a)) (IH fun j ja => ha j (Finset.mem_insert_of_mem ja)...
import Mathlib.Analysis.Convex.Side import Mathlib.Geometry.Euclidean.Angle.Oriented.Rotation import Mathlib.Geometry.Euclidean.Angle.Unoriented.Affine #align_import geometry.euclidean.angle.oriented.affine from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Affine.lean
509
510
theorem _root_.Wbtw.oangle₃₁₂_eq_zero {p₁ p₂ p₃ : P} (h : Wbtw ℝ p₁ p₂ p₃) : ∡ p₃ p₁ p₂ = 0 := by
rw [oangle_eq_zero_iff_oangle_rev_eq_zero, h.oangle₂₁₃_eq_zero]
import Mathlib.Topology.Algebra.UniformConvergence #align_import topology.algebra.equicontinuity from "leanprover-community/mathlib"@"01ad394a11bf06b950232720cf7e8fc6b22f0d6a" open Function open UniformConvergence @[to_additive]
Mathlib/Topology/Algebra/Equicontinuity.lean
20
31
theorem equicontinuous_of_equicontinuousAt_one {ι G M hom : Type*} [TopologicalSpace G] [UniformSpace M] [Group G] [Group M] [TopologicalGroup G] [UniformGroup M] [FunLike hom G M] [MonoidHomClass hom G M] (F : ι → hom) (hf : EquicontinuousAt ((↑) ∘ F) (1 : G)) : Equicontinuous ((↑) ∘ F) := by
rw [equicontinuous_iff_continuous] rw [equicontinuousAt_iff_continuousAt] at hf let φ : G →* (ι →ᵤ M) := { toFun := swap ((↑) ∘ F) map_one' := by dsimp [UniformFun]; ext; exact map_one _ map_mul' := fun a b => by dsimp [UniformFun]; ext; exact map_mul _ _ _ } exact continuous_of_continuousAt_on...
import Mathlib.Analysis.Calculus.FDeriv.Basic #align_import analysis.calculus.fderiv.restrict_scalars from "leanprover-community/mathlib"@"e3fb84046afd187b710170887195d50bada934ee" open Filter Asymptotics ContinuousLinearMap Set Metric open scoped Classical open Topology NNReal Filter Asymptotics ENNReal noncom...
Mathlib/Analysis/Calculus/FDeriv/RestrictScalars.lean
110
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theorem differentiableWithinAt_iff_restrictScalars (hf : DifferentiableWithinAt 𝕜 f s x) (hs : UniqueDiffWithinAt 𝕜 s x) : DifferentiableWithinAt 𝕜' f s x ↔ ∃ g' : E →L[𝕜'] F, g'.restrictScalars 𝕜 = fderivWithin 𝕜 f s x := by
constructor · rintro ⟨g', hg'⟩ exact ⟨g', hs.eq (hg'.restrictScalars 𝕜) hf.hasFDerivWithinAt⟩ · rintro ⟨f', hf'⟩ exact ⟨f', hf.hasFDerivWithinAt.of_restrictScalars 𝕜 hf'⟩
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
897
926
theorem oangle_sign_smul_add_right (x y : V) (r : ℝ) : (o.oangle x (r • x + y)).sign = (o.oangle x y).sign := by
by_cases h : o.oangle x y = 0 ∨ o.oangle x y = π · rwa [Real.Angle.sign_eq_zero_iff.2 h, Real.Angle.sign_eq_zero_iff, oangle_smul_add_right_eq_zero_or_eq_pi_iff] have h' : ∀ r' : ℝ, o.oangle x (r' • x + y) ≠ 0 ∧ o.oangle x (r' • x + y) ≠ π := by intro r' rwa [← o.oangle_smul_add_right_eq_zero_or_eq...
import Mathlib.Algebra.Algebra.Tower import Mathlib.Algebra.GroupWithZero.NonZeroDivisors import Mathlib.GroupTheory.MonoidLocalization import Mathlib.RingTheory.Ideal.Basic import Mathlib.GroupTheory.GroupAction.Ring #align_import ring_theory.localization.basic from "leanprover-community/mathlib"@"b69c9a770ecf37eb21...
Mathlib/RingTheory/Localization/Basic.lean
348
349
theorem mk'_eq_zero_iff (x : R) (s : M) : mk' S x s = 0 ↔ ∃ m : M, ↑m * x = 0 := by
rw [← (map_units S s).mul_left_inj, mk'_spec, zero_mul, map_eq_zero_iff M]
import Mathlib.Init.Data.Nat.Notation import Mathlib.Init.Order.Defs set_option autoImplicit true structure UFModel (n) where parent : Fin n → Fin n rank : Nat → Nat rank_lt : ∀ i, (parent i).1 ≠ i → rank i < rank (parent i) structure UFNode (α : Type*) where parent : Nat value : α rank : Nat inductive...
Mathlib/Data/UnionFind.lean
73
77
theorem mk' {arr : Array α} {f : α → β} {n} {g : Fin n → β} (e : n = arr.size) (H : ∀ i h₁ h₂, f (arr.get ⟨i, h₁⟩) = g ⟨i, h₂⟩) : Agrees arr f g := by
cases e have : (fun i ↦ f (arr.get i)) = g := by funext ⟨i, h⟩; apply H cases this; constructor
import Mathlib.AlgebraicGeometry.Restrict import Mathlib.CategoryTheory.Adjunction.Limits import Mathlib.CategoryTheory.Adjunction.Reflective #align_import algebraic_geometry.Gamma_Spec_adjunction from "leanprover-community/mathlib"@"d39590fc8728fbf6743249802486f8c91ffe07bc" -- Explicit universe annotations were u...
Mathlib/AlgebraicGeometry/GammaSpecAdjunction.lean
128
134
theorem isUnit_res_toΓSpecMapBasicOpen : IsUnit (X.toToΓSpecMapBasicOpen r r) := by
convert (X.presheaf.map <| (eqToHom <| X.toΓSpecMapBasicOpen_eq r).op).isUnit_map (X.toRingedSpace.isUnit_res_basicOpen r) -- Porting note: `rw [comp_apply]` to `erw [comp_apply]` erw [← comp_apply, ← Functor.map_comp] congr
import Mathlib.MeasureTheory.Measure.MeasureSpace open scoped ENNReal NNReal Topology open Set MeasureTheory Measure Filter MeasurableSpace ENNReal Function variable {R α β δ γ ι : Type*} namespace MeasureTheory variable {m0 : MeasurableSpace α} [MeasurableSpace β] [MeasurableSpace γ] variable {μ μ₁ μ₂ μ₃ ν ν' ν...
Mathlib/MeasureTheory/Measure/Restrict.lean
187
190
theorem restrict_restrict_of_subset (h : s ⊆ t) : (μ.restrict t).restrict s = μ.restrict s := by
ext1 u hu rw [restrict_apply hu, restrict_apply hu, restrict_eq_self] exact inter_subset_right.trans h
import Mathlib.Analysis.NormedSpace.Basic import Mathlib.Topology.Algebra.Module.Basic #align_import analysis.normed_space.basic from "leanprover-community/mathlib"@"bc91ed7093bf098d253401e69df601fc33dde156" open Metric Set Function Filter open scoped NNReal Topology instance Real.punctured_nhds_module_neBot {E ...
Mathlib/Analysis/NormedSpace/Real.lean
101
103
theorem frontier_closedBall (x : E) {r : ℝ} (hr : r ≠ 0) : frontier (closedBall x r) = sphere x r := by
rw [frontier, closure_closedBall, interior_closedBall x hr, closedBall_diff_ball]
import Mathlib.Data.Fin.Fin2 import Mathlib.Logic.Function.Basic import Mathlib.Tactic.Common #align_import data.typevec from "leanprover-community/mathlib"@"48fb5b5280e7c81672afc9524185ae994553ebf4" universe u v w @[pp_with_univ] def TypeVec (n : ℕ) := Fin2 n → Type* #align typevec TypeVec instance {n} : Inh...
Mathlib/Data/TypeVec.lean
437
438
theorem id_eq_nilFun {α : TypeVec 0} : @id _ α = nilFun := by
ext x; cases x
import Mathlib.Combinatorics.SimpleGraph.Finite import Mathlib.Combinatorics.SimpleGraph.Maps #align_import combinatorics.simple_graph.subgraph from "leanprover-community/mathlib"@"c6ef6387ede9983aee397d442974e61f89dfd87b" universe u v namespace SimpleGraph @[ext] structure Subgraph {V : Type u} (G : SimpleGra...
Mathlib/Combinatorics/SimpleGraph/Subgraph.lean
177
178
theorem spanningCoe_inj : G₁.spanningCoe = G₂.spanningCoe ↔ G₁.Adj = G₂.Adj := by
simp [Subgraph.spanningCoe]
import Mathlib.Algebra.Polynomial.FieldDivision import Mathlib.Algebra.Polynomial.Lifts import Mathlib.Data.List.Prime #align_import data.polynomial.splits from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" noncomputable section open Polynomial universe u v w variable {R : Type*} {F...
Mathlib/Algebra/Polynomial/Splits.lean
164
165
theorem splits_id_iff_splits {f : K[X]} : (f.map i).Splits (RingHom.id L) ↔ f.Splits i := by
rw [splits_map_iff, RingHom.id_comp]
import Mathlib.Data.Finset.Lattice #align_import combinatorics.set_family.compression.down from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" variable {α : Type*} [DecidableEq α] {𝒜 ℬ : Finset (Finset α)} {s : Finset α} {a : α} namespace Finset def nonMemberSubfamily (a : α) (𝒜 : ...
Mathlib/Combinatorics/SetFamily/Compression/Down.lean
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theorem nonMemberSubfamily_nonMemberSubfamily : (𝒜.nonMemberSubfamily a).nonMemberSubfamily a = 𝒜.nonMemberSubfamily a := by
ext simp
import Mathlib.CategoryTheory.Category.Grpd import Mathlib.CategoryTheory.Groupoid import Mathlib.Topology.Category.TopCat.Basic import Mathlib.Topology.Homotopy.Path import Mathlib.Data.Set.Subsingleton #align_import algebraic_topology.fundamental_groupoid.basic from "leanprover-community/mathlib"@"3d7987cda72abc473...
Mathlib/AlgebraicTopology/FundamentalGroupoid/Basic.lean
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theorem trans_refl_reparam (p : Path x₀ x₁) : p.trans (Path.refl x₁) = p.reparam (fun t => ⟨transReflReparamAux t, transReflReparamAux_mem_I t⟩) (by continuity) (Subtype.ext transReflReparamAux_zero) (Subtype.ext transReflReparamAux_one) := by
ext unfold transReflReparamAux simp only [Path.trans_apply, not_le, coe_reparam, Function.comp_apply, one_div, Path.refl_apply] split_ifs · rfl · rfl · simp · simp
import Mathlib.MeasureTheory.Decomposition.RadonNikodym import Mathlib.Probability.Kernel.Disintegration.CdfToKernel #align_import probability.kernel.cond_cdf from "leanprover-community/mathlib"@"3b88f4005dc2e28d42f974cc1ce838f0dafb39b8" open MeasureTheory Set Filter TopologicalSpace open scoped NNReal ENNReal Me...
Mathlib/Probability/Kernel/Disintegration/CondCdf.lean
87
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theorem iInf_IicSnd_gt (t : ℚ) {s : Set α} (hs : MeasurableSet s) [IsFiniteMeasure ρ] : ⨅ r : { r' : ℚ // t < r' }, ρ.IicSnd r s = ρ.IicSnd t s := by
simp_rw [ρ.IicSnd_apply _ hs, Measure.iInf_rat_gt_prod_Iic hs]
import Mathlib.Data.Set.Function import Mathlib.Order.Interval.Set.OrdConnected #align_import data.set.intervals.proj_Icc from "leanprover-community/mathlib"@"4e24c4bfcff371c71f7ba22050308aa17815626c" variable {α β : Type*} [LinearOrder α] open Function namespace Set def projIci (a x : α) : Ici a := ⟨max a x,...
Mathlib/Order/Interval/Set/ProjIcc.lean
219
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theorem range_IciExtend (f : Ici a → β) : range (IciExtend f) = range f := by
simp only [IciExtend, range_comp f, range_projIci, range_id', image_univ]
import Mathlib.Mathport.Rename import Mathlib.Tactic.Lemma import Mathlib.Tactic.TypeStar #align_import data.option.defs from "leanprover-community/mathlib"@"c4658a649d216f57e99621708b09dcb3dcccbd23" namespace Option #align option.lift_or_get Option.liftOrGet protected def traverse.{u, v} {F : Type u → Type...
Mathlib/Data/Option/Defs.lean
96
97
theorem mem_toList {a : α} {o : Option α} : a ∈ toList o ↔ a ∈ o := by
cases o <;> simp [toList, eq_comm]
import Mathlib.Topology.Algebra.GroupWithZero import Mathlib.Topology.Order.OrderClosed #align_import topology.algebra.with_zero_topology from "leanprover-community/mathlib"@"3e0c4d76b6ebe9dfafb67d16f7286d2731ed6064" open Topology Filter TopologicalSpace Filter Set Function namespace WithZeroTopology variable {α...
Mathlib/Topology/Algebra/WithZeroTopology.lean
47
49
theorem nhds_eq_update : (𝓝 : Γ₀ → Filter Γ₀) = update pure 0 (⨅ γ ≠ 0, 𝓟 (Iio γ)) := by
rw [nhds_nhdsAdjoint, sup_of_le_right] exact le_iInf₂ fun γ hγ ↦ le_principal_iff.2 <| zero_lt_iff.2 hγ
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
46
49
theorem Duplicate.mem (h : x ∈+ l) : x ∈ l := by
induction' h with l' _ y l' _ hm · exact mem_cons_self _ _ · exact mem_cons_of_mem _ hm
import Mathlib.Order.Bounds.Basic import Mathlib.Order.WellFounded import Mathlib.Data.Set.Image import Mathlib.Order.Interval.Set.Basic import Mathlib.Data.Set.Lattice #align_import order.conditionally_complete_lattice.basic from "leanprover-community/mathlib"@"29cb56a7b35f72758b05a30490e1f10bd62c35c1" open Func...
Mathlib/Order/ConditionallyCompleteLattice/Basic.lean
116
121
theorem WithTop.coe_sSup' [SupSet α] {s : Set α} (hs : BddAbove s) : ↑(sSup s) = (sSup ((fun (a : α) ↦ ↑a) '' s) : WithTop α) := by
change _ = ite _ _ _ rw [if_neg, preimage_image_eq, if_pos hs] · exact Option.some_injective _ · rintro ⟨x, _, ⟨⟩⟩
import Mathlib.Algebra.Order.Field.Power import Mathlib.NumberTheory.Padics.PadicVal #align_import number_theory.padics.padic_norm from "leanprover-community/mathlib"@"92ca63f0fb391a9ca5f22d2409a6080e786d99f7" def padicNorm (p : ℕ) (q : ℚ) : ℚ := if q = 0 then 0 else (p : ℚ) ^ (-padicValRat p q) #align padic_n...
Mathlib/NumberTheory/Padics/PadicNorm.lean
327
338
theorem sum_le {α : Type*} {F : α → ℚ} {t : ℚ} {s : Finset α} : s.Nonempty → (∀ i ∈ s, padicNorm p (F i) ≤ t) → padicNorm p (∑ i ∈ s, F i) ≤ t := by
classical refine s.induction_on (by rintro ⟨-, ⟨⟩⟩) ?_ rintro a S haS IH - ht by_cases hs : S.Nonempty · rw [Finset.sum_insert haS] exact padicNorm.nonarchimedean.trans (max_le (ht a (Finset.mem_insert_self a S)) (IH hs fun b hb ↦ ht b (Finset.mem_insert_of_mem hb)...
import Mathlib.Algebra.MvPolynomial.Supported import Mathlib.RingTheory.WittVector.Truncated #align_import ring_theory.witt_vector.mul_coeff from "leanprover-community/mathlib"@"2f5b500a507264de86d666a5f87ddb976e2d8de4" noncomputable section namespace WittVector variable (p : ℕ) [hp : Fact p.Prime] variable {k ...
Mathlib/RingTheory/WittVector/MulCoeff.lean
138
142
theorem mul_polyOfInterest_aux2 (n : ℕ) : (p : 𝕄) ^ n * wittMul p n + wittPolyProdRemainder p n = wittPolyProd p n := by
convert mul_polyOfInterest_aux1 p n rw [sum_range_succ, add_comm, Nat.sub_self, pow_zero, pow_one] rfl
import Mathlib.Algebra.BigOperators.WithTop import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Data.ENNReal.Basic #align_import data.real.ennreal from "leanprover-community/mathlib"@"c14c8fcde993801fca8946b0d80131a1a81d1520" open Set NNReal ENNReal namespace ENNReal variable {a b c d : ℝ≥0∞} {r p q...
Mathlib/Data/ENNReal/Operations.lean
212
212
theorem top_mul' : ∞ * a = if a = 0 then 0 else ∞ := by
convert WithTop.top_mul' a
import Mathlib.Init.Order.Defs import Mathlib.Logic.Nontrivial.Defs import Mathlib.Tactic.Attr.Register import Mathlib.Data.Prod.Basic import Mathlib.Data.Subtype import Mathlib.Logic.Function.Basic import Mathlib.Logic.Unique #align_import logic.nontrivial from "leanprover-community/mathlib"@"48fb5b5280e7c81672afc95...
Mathlib/Logic/Nontrivial/Basic.lean
90
93
theorem nontrivial_at (i' : I) [inst : ∀ i, Nonempty (f i)] [Nontrivial (f i')] : Nontrivial (∀ i : I, f i) := by
letI := Classical.decEq (∀ i : I, f i) exact (Function.update_injective (fun i ↦ Classical.choice (inst i)) i').nontrivial
import Mathlib.MeasureTheory.Function.LpOrder #align_import measure_theory.function.l1_space from "leanprover-community/mathlib"@"ccdbfb6e5614667af5aa3ab2d50885e0ef44a46f" noncomputable section open scoped Classical open Topology ENNReal MeasureTheory NNReal open Set Filter TopologicalSpace ENNReal EMetric Meas...
Mathlib/MeasureTheory/Function/L1Space.lean
859
869
theorem Integrable.measure_norm_ge_lt_top {f : α → β} (hf : Integrable f μ) {ε : ℝ} (hε : 0 < ε) : μ { x | ε ≤ ‖f x‖ } < ∞ := by
rw [show { x | ε ≤ ‖f x‖ } = { x | ENNReal.ofReal ε ≤ ‖f x‖₊ } by simp only [ENNReal.ofReal, Real.toNNReal_le_iff_le_coe, ENNReal.coe_le_coe, coe_nnnorm]] refine (meas_ge_le_mul_pow_snorm μ one_ne_zero ENNReal.one_ne_top hf.1 ?_).trans_lt ?_ · simpa only [Ne, ENNReal.ofReal_eq_zero, not_le] using hε appl...
import Mathlib.GroupTheory.Archimedean import Mathlib.Topology.Order.Basic #align_import topology.algebra.order.archimedean from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" open Set theorem Rat.denseRange_cast {𝕜} [LinearOrderedField 𝕜] [TopologicalSpace 𝕜] [OrderTopology 𝕜] ...
Mathlib/Topology/Algebra/Order/Archimedean.lean
67
71
theorem dense_or_cyclic (S : AddSubgroup G) : Dense (S : Set G) ∨ ∃ a : G, S = closure {a} := by
refine (em _).imp (dense_of_not_isolated_zero S) fun h => ?_ push_neg at h rcases h with ⟨ε, ε0, hε⟩ exact cyclic_of_isolated_zero ε0 (disjoint_left.2 hε)
import Mathlib.Analysis.Convex.Cone.Extension import Mathlib.Analysis.Convex.Gauge import Mathlib.Topology.Algebra.Module.FiniteDimension import Mathlib.Topology.Algebra.Module.LocallyConvex #align_import analysis.normed_space.hahn_banach.separation from "leanprover-community/mathlib"@"915591b2bb3ea303648db07284a161a...
Mathlib/Analysis/NormedSpace/HahnBanach/Separation.lean
84
112
theorem geometric_hahn_banach_open (hs₁ : Convex ℝ s) (hs₂ : IsOpen s) (ht : Convex ℝ t) (disj : Disjoint s t) : ∃ (f : E →L[ℝ] ℝ) (u : ℝ), (∀ a ∈ s, f a < u) ∧ ∀ b ∈ t, u ≤ f b := by
obtain rfl | ⟨a₀, ha₀⟩ := s.eq_empty_or_nonempty · exact ⟨0, 0, by simp, fun b _hb => le_rfl⟩ obtain rfl | ⟨b₀, hb₀⟩ := t.eq_empty_or_nonempty · exact ⟨0, 1, fun a _ha => zero_lt_one, by simp⟩ let x₀ := b₀ - a₀ let C := x₀ +ᵥ (s - t) have : (0 : E) ∈ C := ⟨a₀ - b₀, sub_mem_sub ha₀ hb₀, by simp_rw [x₀...
import Mathlib.Logic.Encodable.Lattice import Mathlib.MeasureTheory.MeasurableSpace.Defs #align_import measure_theory.pi_system from "leanprover-community/mathlib"@"98e83c3d541c77cdb7da20d79611a780ff8e7d90" open MeasurableSpace Set open scoped Classical open MeasureTheory def IsPiSystem {α} (C : Set (Set α)) :...
Mathlib/MeasureTheory/PiSystem.lean
85
92
theorem IsPiSystem.insert_empty {α} {S : Set (Set α)} (h_pi : IsPiSystem S) : IsPiSystem (insert ∅ S) := by
intro s hs t ht hst cases' hs with hs hs · simp [hs] · cases' ht with ht ht · simp [ht] · exact Set.mem_insert_of_mem _ (h_pi s hs t ht hst)
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
62
68
theorem eq_zero_of_abs_lt_dvd {m x : ℤ} (h1 : m ∣ x) (h2 : |x| < m) : x = 0 := by
obtain rfl | hm := eq_or_ne m 0 · exact Int.zero_dvd.1 h1 rcases h1 with ⟨d, rfl⟩ apply mul_eq_zero_of_right rw [← abs_lt_one_iff, ← mul_lt_iff_lt_one_right (abs_pos.mpr hm), ← abs_mul] exact lt_of_lt_of_le h2 (le_abs_self m)
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
793
797
theorem tendsto_translationNumber (x : ℝ) : Tendsto (fun n : ℕ => ((f ^ n) x - x) / n) atTop (𝓝 <| τ f) := by
rw [← translationNumber_conj_eq' (translate <| Multiplicative.ofAdd x)] refine (tendsto_translation_number₀ _).congr fun n ↦ ?_ simp [sub_eq_neg_add, Units.conj_pow']
import Mathlib.MeasureTheory.Decomposition.SignedHahn import Mathlib.MeasureTheory.Measure.MutuallySingular #align_import measure_theory.decomposition.jordan from "leanprover-community/mathlib"@"70a4f2197832bceab57d7f41379b2592d1110570" noncomputable section open scoped Classical MeasureTheory ENNReal NNReal va...
Mathlib/MeasureTheory/Decomposition/Jordan.lean
135
137
theorem coe_smul (r : ℝ≥0) : (r : ℝ) • j = r • j := by
-- Porting note: replaced `show` rw [real_smul_def, if_pos (NNReal.coe_nonneg r), Real.toNNReal_coe]
import Mathlib.Dynamics.Ergodic.MeasurePreserving import Mathlib.MeasureTheory.Function.SimpleFunc import Mathlib.MeasureTheory.Measure.MutuallySingular import Mathlib.MeasureTheory.Measure.Count import Mathlib.Topology.IndicatorConstPointwise import Mathlib.MeasureTheory.Constructions.BorelSpace.Real #align_import m...
Mathlib/MeasureTheory/Integral/Lebesgue.lean
1,259
1,284
theorem lintegral_iSup_directed [Countable β] {f : β → α → ℝ≥0∞} (hf : ∀ b, AEMeasurable (f b) μ) (h_directed : Directed (· ≤ ·) f) : ∫⁻ a, ⨆ b, f b a ∂μ = ⨆ b, ∫⁻ a, f b a ∂μ := by
simp_rw [← iSup_apply] let p : α → (β → ENNReal) → Prop := fun x f' => Directed LE.le f' have hp : ∀ᵐ x ∂μ, p x fun i => f i x := by filter_upwards [] with x i j obtain ⟨z, hz₁, hz₂⟩ := h_directed i j exact ⟨z, hz₁ x, hz₂ x⟩ have h_ae_seq_directed : Directed LE.le (aeSeq hf p) := by intro b₁ b₂...
import Mathlib.GroupTheory.GroupAction.ConjAct import Mathlib.GroupTheory.GroupAction.Quotient import Mathlib.GroupTheory.QuotientGroup import Mathlib.Topology.Algebra.Monoid import Mathlib.Topology.Algebra.Constructions #align_import topology.algebra.group.basic from "leanprover-community/mathlib"@"3b1890e71632be9e3...
Mathlib/Topology/Algebra/Group/Basic.lean
623
624
theorem tendsto_inv_nhdsWithin_Ici_inv {a : H} : Tendsto Inv.inv (𝓝[≥] a⁻¹) (𝓝[≤] a) := by
simpa only [inv_inv] using @tendsto_inv_nhdsWithin_Ici _ _ _ _ a⁻¹
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
1,042
1,044
theorem isOpenMap_sum {f : X ⊕ Y → Z} : IsOpenMap f ↔ (IsOpenMap fun a => f (inl a)) ∧ IsOpenMap fun b => f (inr b) := by
simp only [isOpenMap_iff_nhds_le, Sum.forall, nhds_inl, nhds_inr, Filter.map_map, comp]
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
159
161
theorem contractRight_mul_algebraMap (a : CliffordAlgebra Q) (r : R) : a * algebraMap _ _ r⌊d = a⌊d * algebraMap _ _ r := by
rw [← Algebra.commutes, contractRight_algebraMap_mul, Algebra.commutes]
import Mathlib.Probability.Notation import Mathlib.Probability.Independence.Basic import Mathlib.MeasureTheory.Function.ConditionalExpectation.Basic #align_import probability.conditional_expectation from "leanprover-community/mathlib"@"2f8347015b12b0864dfaf366ec4909eb70c78740" open TopologicalSpace Filter open s...
Mathlib/Probability/ConditionalExpectation.lean
40
77
theorem condexp_indep_eq (hle₁ : m₁ ≤ m) (hle₂ : m₂ ≤ m) [SigmaFinite (μ.trim hle₂)] (hf : StronglyMeasurable[m₁] f) (hindp : Indep m₁ m₂ μ) : μ[f|m₂] =ᵐ[μ] fun _ => μ[f] := by
by_cases hfint : Integrable f μ swap; · rw [condexp_undef hfint, integral_undef hfint]; rfl refine (ae_eq_condexp_of_forall_setIntegral_eq hle₂ hfint (fun s _ hs => integrableOn_const.2 (Or.inr hs)) (fun s hms hs => ?_) stronglyMeasurable_const.aeStronglyMeasurable').symm rw [setIntegral_const] rw ...
import Mathlib.Analysis.Convex.Between import Mathlib.Analysis.Convex.Jensen import Mathlib.Analysis.Convex.Topology import Mathlib.Analysis.Normed.Group.Pointwise import Mathlib.Analysis.NormedSpace.AddTorsor #align_import analysis.convex.normed from "leanprover-community/mathlib"@"a63928c34ec358b5edcda2bf7513c50052...
Mathlib/Analysis/Convex/Normed.lean
144
147
theorem isConnected_setOf_sameRay (x : E) : IsConnected { y | SameRay ℝ x y } := by
by_cases hx : x = 0; · simpa [hx] using isConnected_univ (α := E) simp_rw [← exists_nonneg_left_iff_sameRay hx] exact isConnected_Ici.image _ (continuous_id.smul continuous_const).continuousOn
import Mathlib.CategoryTheory.Linear.LinearFunctor import Mathlib.CategoryTheory.Monoidal.Preadditive #align_import category_theory.monoidal.linear from "leanprover-community/mathlib"@"986c4d5761f938b2e1c43c01f001b6d9d88c2055" namespace CategoryTheory open CategoryTheory.Limits open CategoryTheory.MonoidalCateg...
Mathlib/CategoryTheory/Monoidal/Linear.lean
58
70
theorem monoidalLinearOfFaithful {D : Type*} [Category D] [Preadditive D] [Linear R D] [MonoidalCategory D] [MonoidalPreadditive D] (F : MonoidalFunctor D C) [F.Faithful] [F.toFunctor.Additive] [F.toFunctor.Linear R] : MonoidalLinear R D := { whiskerLeft_smul := by
intros X Y Z r f apply F.toFunctor.map_injective rw [F.map_whiskerLeft] simp smul_whiskerRight := by intros r X Y f Z apply F.toFunctor.map_injective rw [F.map_whiskerRight] simp }
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
239
241
theorem PreservesPushout.inl_iso_inv : G.map pushout.inl ≫ (PreservesPushout.iso G f g).inv = pushout.inl := by
simp [PreservesPushout.iso, Iso.comp_inv_eq]
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
744
746
theorem le_mul_right (a : Ordinal) {b : Ordinal} (hb : 0 < b) : a ≤ b * a := by
convert mul_le_mul_right' (one_le_iff_pos.2 hb) a rw [one_mul a]
import Mathlib.Probability.Martingale.Basic #align_import probability.martingale.centering from "leanprover-community/mathlib"@"bea6c853b6edbd15e9d0941825abd04d77933ed0" open TopologicalSpace Filter open scoped NNReal ENNReal MeasureTheory ProbabilityTheory namespace MeasureTheory variable {Ω E : Type*} {m0 : ...
Mathlib/Probability/Martingale/Centering.lean
86
90
theorem integrable_martingalePart (hf_int : ∀ n, Integrable (f n) μ) (n : ℕ) : Integrable (martingalePart f ℱ μ n) μ := by
rw [martingalePart_eq_sum] exact (hf_int 0).add (integrable_finset_sum' _ fun i _ => ((hf_int _).sub (hf_int _)).sub integrable_condexp)
import Mathlib.Algebra.Group.Commute.Basic import Mathlib.Data.Fintype.Card import Mathlib.GroupTheory.Perm.Basic #align_import group_theory.perm.support from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" open Equiv Finset namespace Equiv.Perm variable {α : Type*} section support v...
Mathlib/GroupTheory/Perm/Support.lean
297
298
theorem mem_support {x : α} : x ∈ f.support ↔ f x ≠ x := by
rw [support, mem_filter, and_iff_right (mem_univ x)]
import Mathlib.Analysis.Normed.Group.Hom import Mathlib.Analysis.SpecialFunctions.Pow.Continuity import Mathlib.Data.Set.Image import Mathlib.MeasureTheory.Function.LpSeminorm.ChebyshevMarkov import Mathlib.MeasureTheory.Function.LpSeminorm.CompareExp import Mathlib.MeasureTheory.Function.LpSeminorm.TriangleInequality...
Mathlib/MeasureTheory/Function/LpSpace.lean
126
127
theorem toLp_congr {f g : α → E} (hf : Memℒp f p μ) (hg : Memℒp g p μ) (hfg : f =ᵐ[μ] g) : hf.toLp f = hg.toLp g := by
simp [toLp, hfg]
import Mathlib.Analysis.Convex.Hull #align_import analysis.convex.join from "leanprover-community/mathlib"@"951bf1d9e98a2042979ced62c0620bcfb3587cf8" open Set variable {ι : Sort*} {𝕜 E : Type*} section OrderedSemiring variable (𝕜) [OrderedSemiring 𝕜] [AddCommMonoid E] [Module 𝕜 E] {s t s₁ s₂ t₁ t₂ u : Set ...
Mathlib/Analysis/Convex/Join.lean
98
100
theorem convexJoin_iUnion_right (s : Set E) (t : ι → Set E) : convexJoin 𝕜 s (⋃ i, t i) = ⋃ i, convexJoin 𝕜 s (t i) := by
simp_rw [convexJoin_comm s, convexJoin_iUnion_left]
import Mathlib.Data.Set.Image import Mathlib.Data.SProd #align_import data.set.prod from "leanprover-community/mathlib"@"48fb5b5280e7c81672afc9524185ae994553ebf4" open Function namespace Set section Prod variable {α β γ δ : Type*} {s s₁ s₂ : Set α} {t t₁ t₂ : Set β} {a : α} {b : β} theorem Subsingleton.pro...
Mathlib/Data/Set/Prod.lean
231
233
theorem mk_preimage_prod_right (ha : a ∈ s) : Prod.mk a ⁻¹' s ×ˢ t = t := by
ext b simp [ha]
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Monic import Mathlib.Algebra.Ring.Action.Basic import Mathlib.GroupTheory.GroupAction.Hom import Mathlib.GroupTheory.GroupAction.Quotient #align_import algebra.polynomial.group_ring_action from "leanprover-community/mathlib"@"afad8e438d03f...
Mathlib/Algebra/Polynomial/GroupRingAction.lean
76
78
theorem smul_eval [MulSemiringAction G S] (g : G) (f : S[X]) (x : S) : (g • f).eval x = g • f.eval (g⁻¹ • x) := by
rw [← smul_eval_smul, smul_inv_smul]
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
74
119
theorem isIntegralClosure_adjoin_singleton_of_prime_pow [hcycl : IsCyclotomicExtension {p ^ k} ℚ K] (hζ : IsPrimitiveRoot ζ ↑(p ^ k)) : IsIntegralClosure (adjoin ℤ ({ζ} : Set K)) ℤ K := by
refine ⟨Subtype.val_injective, @fun x => ⟨fun h => ⟨⟨x, ?_⟩, rfl⟩, ?_⟩⟩ swap · rintro ⟨y, rfl⟩ exact IsIntegral.algebraMap ((le_integralClosure_iff_isIntegral.1 (adjoin_le_integralClosure (hζ.isIntegral (p ^ k).pos))).isIntegral _) let B := hζ.subOnePowerBasis ℚ have hint : IsInte...
import Mathlib.Algebra.Associated import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Algebra.SMulWithZero import Mathlib.Data.Nat.PartENat import Mathlib.Tactic.Linarith #align_import ring_theory.multiplicity from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" variable {α β...
Mathlib/RingTheory/Multiplicity.lean
123
126
theorem pos_of_dvd {a b : α} (hfin : Finite a b) (hdiv : a ∣ b) : 0 < (multiplicity a b).get hfin := by
refine zero_lt_iff.2 fun h => ?_ simpa [hdiv] using is_greatest' hfin (lt_one_iff.mpr h)
import Mathlib.Algebra.CharP.Invertible import Mathlib.Algebra.MvPolynomial.Variables import Mathlib.Algebra.MvPolynomial.CommRing import Mathlib.Algebra.MvPolynomial.Expand import Mathlib.Data.Fintype.BigOperators import Mathlib.Data.ZMod.Basic #align_import ring_theory.witt_vector.witt_polynomial from "leanprover-c...
Mathlib/RingTheory/WittVector/WittPolynomial.lean
154
163
theorem wittPolynomial_zmod_self (n : ℕ) : W_ (ZMod (p ^ (n + 1))) (n + 1) = expand p (W_ (ZMod (p ^ (n + 1))) n) := by
simp only [wittPolynomial_eq_sum_C_mul_X_pow] rw [sum_range_succ, ← Nat.cast_pow, CharP.cast_eq_zero (ZMod (p ^ (n + 1))) (p ^ (n + 1)), C_0, zero_mul, add_zero, AlgHom.map_sum, sum_congr rfl] intro k hk rw [AlgHom.map_mul, AlgHom.map_pow, expand_X, algHom_C, ← pow_mul, ← pow_succ'] congr rw [mem_range...
import Mathlib.MeasureTheory.Function.StronglyMeasurable.Lp import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.Order.Filter.IndicatorFunction import Mathlib.MeasureTheory.Function.StronglyMeasurable.Inner import Mathlib.MeasureTheory.Function.LpSeminorm.Trim #align_import measure_theory.function.conditional...
Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean
102
110
theorem const_inner {𝕜 β} [RCLike 𝕜] [NormedAddCommGroup β] [InnerProductSpace 𝕜 β] {f : α → β} (hfm : AEStronglyMeasurable' m f μ) (c : β) : AEStronglyMeasurable' m (fun x => (inner c (f x) : 𝕜)) μ := by
rcases hfm with ⟨f', hf'_meas, hf_ae⟩ refine ⟨fun x => (inner c (f' x) : 𝕜), (@stronglyMeasurable_const _ _ m _ c).inner hf'_meas, hf_ae.mono fun x hx => ?_⟩ dsimp only rw [hx]
import Mathlib.Dynamics.Ergodic.MeasurePreserving import Mathlib.MeasureTheory.Function.SimpleFunc import Mathlib.MeasureTheory.Measure.MutuallySingular import Mathlib.MeasureTheory.Measure.Count import Mathlib.Topology.IndicatorConstPointwise import Mathlib.MeasureTheory.Constructions.BorelSpace.Real #align_import m...
Mathlib/MeasureTheory/Integral/Lebesgue.lean
847
850
theorem mul_meas_ge_le_lintegral₀ {f : α → ℝ≥0∞} (hf : AEMeasurable f μ) (ε : ℝ≥0∞) : ε * μ { x | ε ≤ f x } ≤ ∫⁻ a, f a ∂μ := by
simpa only [lintegral_zero, zero_add] using lintegral_add_mul_meas_add_le_le_lintegral (ae_of_all _ fun x => zero_le (f x)) hf ε
import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Algebra.Ring.Divisibility.Basic import Mathlib.Algebra.Ring.Hom.Defs import Mathlib.GroupTheory.GroupAction.Units import Mathlib.Logic.Basic import Mathlib.Tactic.Ring #align_import ring_theory.coprime.basic from "leanprover-community/mathlib"@"a95b16cb...
Mathlib/RingTheory/Coprime/Basic.lean
114
121
theorem IsCoprime.mul_left (H1 : IsCoprime x z) (H2 : IsCoprime y z) : IsCoprime (x * y) z := let ⟨a, b, h1⟩ := H1 let ⟨c, d, h2⟩ := H2 ⟨a * c, a * x * d + b * c * y + b * d * z, calc a * c * (x * y) + (a * x * d + b * c * y + b * d * z) * z _ = (a * x + b * z) * (c * y + d * z) := by
ring _ = 1 := by rw [h1, h2, mul_one] ⟩
import Mathlib.Analysis.Complex.Circle import Mathlib.MeasureTheory.Group.Integral import Mathlib.MeasureTheory.Integral.SetIntegral import Mathlib.MeasureTheory.Measure.Haar.OfBasis import Mathlib.MeasureTheory.Constructions.Prod.Integral import Mathlib.MeasureTheory.Measure.Haar.InnerProductSpace import Mathlib.Alge...
Mathlib/Analysis/Fourier/FourierTransform.lean
96
100
theorem norm_fourierIntegral_le_integral_norm (e : AddChar 𝕜 𝕊) (μ : Measure V) (L : V →ₗ[𝕜] W →ₗ[𝕜] 𝕜) (f : V → E) (w : W) : ‖fourierIntegral e μ L f w‖ ≤ ∫ v : V, ‖f v‖ ∂μ := by
refine (norm_integral_le_integral_norm _).trans (le_of_eq ?_) simp_rw [norm_circle_smul]
import Mathlib.Analysis.Convex.Topology import Mathlib.Analysis.NormedSpace.Pointwise import Mathlib.Analysis.Seminorm import Mathlib.Analysis.LocallyConvex.Bounded import Mathlib.Analysis.RCLike.Basic #align_import analysis.convex.gauge from "leanprover-community/mathlib"@"373b03b5b9d0486534edbe94747f23cb3712f93d" ...
Mathlib/Analysis/Convex/Gauge.lean
459
475
theorem continuousAt_gauge (hc : Convex ℝ s) (hs₀ : s ∈ 𝓝 0) : ContinuousAt (gauge s) x := by
have ha : Absorbent ℝ s := absorbent_nhds_zero hs₀ refine (nhds_basis_Icc_pos _).tendsto_right_iff.2 fun ε hε₀ ↦ ?_ rw [← map_add_left_nhds_zero, eventually_map] have : ε • s ∩ -(ε • s) ∈ 𝓝 0 := inter_mem ((set_smul_mem_nhds_zero_iff hε₀.ne').2 hs₀) (neg_mem_nhds_zero _ ((set_smul_mem_nhds_zero_iff ...
import Mathlib.Algebra.Field.Opposite import Mathlib.Algebra.Group.Subgroup.ZPowers import Mathlib.Algebra.Group.Submonoid.Membership import Mathlib.Algebra.Ring.NegOnePow import Mathlib.Algebra.Order.Archimedean import Mathlib.GroupTheory.Coset #align_import algebra.periodic from "leanprover-community/mathlib"@"3041...
Mathlib/Algebra/Periodic.lean
480
482
theorem Antiperiodic.int_mul_sub_eq [Ring α] [Ring β] (h : Antiperiodic f c) (n : ℤ) : f (n * c - x) = (n.negOnePow : ℤ) * f (-x) := by
simpa only [zsmul_eq_mul] using h.zsmul_sub_eq n
import Mathlib.CategoryTheory.Limits.Shapes.CommSq import Mathlib.CategoryTheory.Limits.Shapes.Diagonal import Mathlib.CategoryTheory.MorphismProperty.Composition universe v u namespace CategoryTheory open Limits namespace MorphismProperty variable {C : Type u} [Category.{v} C] def StableUnderBaseChange (P : ...
Mathlib/CategoryTheory/MorphismProperty/Limits.lean
219
228
theorem RespectsIso.diagonal (hP : P.RespectsIso) : P.diagonal.RespectsIso := by
constructor · introv H rwa [diagonal_iff, pullback.diagonal_comp, hP.cancel_left_isIso, hP.cancel_left_isIso, ← hP.cancel_right_isIso _ (pullback.map (e.hom ≫ f) (e.hom ≫ f) f f e.hom e.hom (𝟙 Z) (by simp) (by simp)), ← pullback.condition, hP.cancel_left_isIso] · introv H delta diago...
import Mathlib.Algebra.BigOperators.Group.Multiset import Mathlib.Data.PNat.Prime import Mathlib.Data.Nat.Factors import Mathlib.Data.Multiset.Sort #align_import data.pnat.factors from "leanprover-community/mathlib"@"e3d9ab8faa9dea8f78155c6c27d62a621f4c152d" -- Porting note: `deriving` contained Inhabited, Canonic...
Mathlib/Data/PNat/Factors.lean
89
91
theorem coeNat_prime (v : PrimeMultiset) (p : ℕ) (h : p ∈ (v : Multiset ℕ)) : p.Prime := by
rcases Multiset.mem_map.mp h with ⟨⟨_, hp'⟩, ⟨_, h_eq⟩⟩ exact h_eq ▸ hp'
import Mathlib.Init.Control.Combinators import Mathlib.Data.Option.Defs import Mathlib.Logic.IsEmpty import Mathlib.Logic.Relator import Mathlib.Util.CompileInductive import Aesop #align_import data.option.basic from "leanprover-community/mathlib"@"f340f229b1f461aa1c8ee11e0a172d0a3b301a4a" universe u namespace Op...
Mathlib/Data/Option/Basic.lean
260
270
theorem pmap_eq_some_iff {hf} {y : β} : pmap f x hf = some y ↔ ∃ (a : α) (H : x = some a), f a (hf a H) = y := by
rcases x with (_|x) · simp only [not_mem_none, exists_false, pmap, not_false_iff, exists_prop_of_false] · constructor · intro h simp only [pmap, Option.some_inj] at h exact ⟨x, rfl, h⟩ · rintro ⟨a, H, rfl⟩ simp only [mem_def, Option.some_inj] at H simp only [H, pmap]
import Mathlib.MeasureTheory.Integral.IntegrableOn import Mathlib.MeasureTheory.Integral.Bochner import Mathlib.MeasureTheory.Function.LocallyIntegrable import Mathlib.Topology.MetricSpace.ThickenedIndicator import Mathlib.Topology.ContinuousFunction.Compact import Mathlib.Analysis.NormedSpace.HahnBanach.SeparatingDua...
Mathlib/MeasureTheory/Integral/SetIntegral.lean
1,119
1,128
theorem continuous_setIntegral [NormedSpace ℝ E] (s : Set X) : Continuous fun f : X →₁[μ] E => ∫ x in s, f x ∂μ := by
haveI : Fact ((1 : ℝ≥0∞) ≤ 1) := ⟨le_rfl⟩ have h_comp : (fun f : X →₁[μ] E => ∫ x in s, f x ∂μ) = integral (μ.restrict s) ∘ fun f => LpToLpRestrictCLM X E ℝ μ 1 s f := by ext1 f rw [Function.comp_apply, integral_congr_ae (LpToLpRestrictCLM_coeFn ℝ s f)] rw [h_comp] exact continuous_integral.c...
import Mathlib.Analysis.SpecialFunctions.Complex.Circle import Mathlib.Geometry.Euclidean.Angle.Oriented.Basic #align_import geometry.euclidean.angle.oriented.rotation from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" noncomputable section open FiniteDimensional Complex open scoped ...
Mathlib/Geometry/Euclidean/Angle/Oriented/Rotation.lean
307
308
theorem eq_rotation_self_iff (x : V) (θ : Real.Angle) : x = o.rotation θ x ↔ x = 0 ∨ θ = 0 := by
rw [← rotation_eq_self_iff, eq_comm]
import Mathlib.MeasureTheory.Decomposition.Lebesgue import Mathlib.MeasureTheory.Measure.Complex import Mathlib.MeasureTheory.Decomposition.Jordan import Mathlib.MeasureTheory.Measure.WithDensityVectorMeasure noncomputable section open scoped Classical MeasureTheory NNReal ENNReal open Set variable {α β : Type*...
Mathlib/MeasureTheory/Decomposition/SignedLebesgue.lean
395
398
theorem singularPart_sub (s t : SignedMeasure α) (μ : Measure α) [s.HaveLebesgueDecomposition μ] [t.HaveLebesgueDecomposition μ] : (s - t).singularPart μ = s.singularPart μ - t.singularPart μ := by
rw [sub_eq_add_neg, sub_eq_add_neg, singularPart_add, singularPart_neg]
import Mathlib.CategoryTheory.Balanced import Mathlib.CategoryTheory.Limits.EssentiallySmall import Mathlib.CategoryTheory.Limits.Opposites import Mathlib.CategoryTheory.Limits.Shapes.ZeroMorphisms import Mathlib.CategoryTheory.Subobject.Lattice import Mathlib.CategoryTheory.Subobject.WellPowered import Mathlib.Data.S...
Mathlib/CategoryTheory/Generator.lean
113
114
theorem isSeparating_unop_iff (𝒢 : Set Cᵒᵖ) : IsSeparating 𝒢.unop ↔ IsCoseparating 𝒢 := by
rw [← isCoseparating_op_iff, Set.unop_op]
import Mathlib.Algebra.Group.Pi.Basic import Mathlib.Order.Interval.Set.Basic import Mathlib.Order.Interval.Set.UnorderedInterval import Mathlib.Data.Set.Lattice #align_import data.set.intervals.pi from "leanprover-community/mathlib"@"e4bc74cbaf429d706cb9140902f7ca6c431e75a4" -- Porting note: Added, since dot nota...
Mathlib/Order/Interval/Set/Pi.lean
101
109
theorem pi_univ_Ioc_update_right {x y : ∀ i, α i} {i₀ : ι} {m : α i₀} (hm : m ≤ y i₀) : (pi univ fun i ↦ Ioc (x i) (update y i₀ m i)) = { z | z i₀ ≤ m } ∩ pi univ fun i ↦ Ioc (x i) (y i) := by
have : Ioc (x i₀) m = Iic m ∩ Ioc (x i₀) (y i₀) := by rw [← Ioi_inter_Iic, ← Ioi_inter_Iic, inter_left_comm, inter_eq_self_of_subset_left (Iic_subset_Iic.2 hm)] simp_rw [univ_pi_update i₀ y m fun i z ↦ Ioc (x i) z, ← pi_inter_compl ({i₀} : Set ι), singleton_pi', ← inter_assoc, this] 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
258
261
theorem finprod_congr_Prop {p q : Prop} {f : p → M} {g : q → M} (hpq : p = q) (hfg : ∀ h : q, f (hpq.mpr h) = g h) : finprod f = finprod g := by
subst q exact finprod_congr hfg
import Mathlib.Probability.Notation import Mathlib.Probability.Integration import Mathlib.MeasureTheory.Function.L2Space #align_import probability.variance from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" open MeasureTheory Filter Finset noncomputable section open scoped MeasureThe...
Mathlib/Probability/Variance.lean
146
154
theorem evariance_eq_zero_iff (hX : AEMeasurable X μ) : evariance X μ = 0 ↔ X =ᵐ[μ] fun _ => μ[X] := by
rw [evariance, lintegral_eq_zero_iff'] constructor <;> intro hX <;> filter_upwards [hX] with ω hω · simpa only [Pi.zero_apply, sq_eq_zero_iff, ENNReal.coe_eq_zero, nnnorm_eq_zero, sub_eq_zero] using hω · rw [hω] simp · exact (hX.sub_const _).ennnorm.pow_const _ -- TODO `measurability` and `fun_prop...
import Mathlib.Order.Hom.CompleteLattice import Mathlib.Topology.Bases import Mathlib.Topology.Homeomorph import Mathlib.Topology.ContinuousFunction.Basic import Mathlib.Order.CompactlyGenerated.Basic import Mathlib.Order.Copy #align_import topology.sets.opens from "leanprover-community/mathlib"@"dc6c365e751e34d100e8...
Mathlib/Topology/Sets/Opens.lean
247
249
theorem mem_iSup {ι} {x : α} {s : ι → Opens α} : x ∈ iSup s ↔ ∃ i, x ∈ s i := by
rw [← SetLike.mem_coe] simp
import Mathlib.MeasureTheory.Measure.MeasureSpace open scoped ENNReal NNReal Topology open Set MeasureTheory Measure Filter MeasurableSpace ENNReal Function variable {R α β δ γ ι : Type*} namespace MeasureTheory variable {m0 : MeasurableSpace α} [MeasurableSpace β] [MeasurableSpace γ] variable {μ μ₁ μ₂ μ₃ ν ν' ν...
Mathlib/MeasureTheory/Measure/Restrict.lean
447
449
theorem ext_iff_of_biUnion_eq_univ {S : Set ι} {s : ι → Set α} (hc : S.Countable) (hs : ⋃ i ∈ S, s i = univ) : μ = ν ↔ ∀ i ∈ S, μ.restrict (s i) = ν.restrict (s i) := by
rw [← restrict_biUnion_congr hc, hs, restrict_univ, restrict_univ]
import Mathlib.Algebra.Order.Kleene import Mathlib.Algebra.Ring.Hom.Defs import Mathlib.Data.List.Join import Mathlib.Data.Set.Lattice import Mathlib.Tactic.DeriveFintype #align_import computability.language from "leanprover-community/mathlib"@"a239cd3e7ac2c7cde36c913808f9d40c411344f6" open List Set Computability...
Mathlib/Computability/Language.lean
200
203
theorem le_mul_congr {l₁ l₂ m₁ m₂ : Language α} : l₁ ≤ m₁ → l₂ ≤ m₂ → l₁ * l₂ ≤ m₁ * m₂ := by
intro h₁ h₂ x hx simp only [mul_def, exists_and_left, mem_image2, image_prod] at hx ⊢ tauto
import Mathlib.CategoryTheory.Sites.Spaces import Mathlib.Topology.Sheaves.Sheaf import Mathlib.CategoryTheory.Sites.DenseSubsite #align_import topology.sheaves.sheaf_condition.sites from "leanprover-community/mathlib"@"d39590fc8728fbf6743249802486f8c91ffe07bc" noncomputable section set_option linter.uppercaseLe...
Mathlib/Topology/Sheaves/SheafCondition/Sites.lean
137
144
theorem coverDense_iff_isBasis [Category ι] (B : ι ⥤ Opens X) : B.IsCoverDense (Opens.grothendieckTopology X) ↔ Opens.IsBasis (Set.range B.obj) := by
rw [Opens.isBasis_iff_nbhd] constructor · intro hd U x hx; rcases hd.1 U x hx with ⟨V, f, ⟨i, f₁, f₂, _⟩, hV⟩ exact ⟨B.obj i, ⟨i, rfl⟩, f₁.le hV, f₂.le⟩ intro hb; constructor; intro U x hx; rcases hb hx with ⟨_, ⟨i, rfl⟩, hx, hi⟩ exact ⟨B.obj i, ⟨⟨hi⟩⟩, ⟨⟨i, 𝟙 _, ⟨⟨hi⟩⟩, rfl⟩⟩, hx⟩
import Mathlib.Analysis.Convex.Combination import Mathlib.Analysis.Convex.Strict import Mathlib.Topology.Connected.PathConnected import Mathlib.Topology.Algebra.Affine import Mathlib.Topology.Algebra.Module.Basic #align_import analysis.convex.topology from "leanprover-community/mathlib"@"0e3aacdc98d25e0afe035c452d876...
Mathlib/Analysis/Convex/Topology.lean
95
97
theorem segment_subset_closure_openSegment : [x -[𝕜] y] ⊆ closure (openSegment 𝕜 x y) := by
rw [segment_eq_image, openSegment_eq_image, ← closure_Ioo (zero_ne_one' 𝕜)] exact image_closure_subset_closure_image (by continuity)
import Mathlib.Data.Nat.Choose.Basic import Mathlib.Data.Sym.Sym2 namespace List variable {α : Type*} section Sym2 protected def sym2 : List α → List (Sym2 α) | [] => [] | x :: xs => (x :: xs).map (fun y => s(x, y)) ++ xs.sym2 theorem mem_sym2_cons_iff {x : α} {xs : List α} {z : Sym2 α} : z ∈ (x :: xs)...
Mathlib/Data/List/Sym.lean
68
79
theorem mk_mem_sym2 {xs : List α} {a b : α} (ha : a ∈ xs) (hb : b ∈ xs) : s(a, b) ∈ xs.sym2 := by
induction xs with | nil => simp at ha | cons x xs ih => rw [mem_sym2_cons_iff] rw [mem_cons] at ha hb obtain (rfl | ha) := ha <;> obtain (rfl | hb) := hb · left; rfl · right; left; use b · right; left; rw [Sym2.eq_swap]; use a · right; right; exact ih ha hb
import Batteries.Data.RBMap.Basic import Mathlib.Init.Data.Nat.Notation import Mathlib.Mathport.Rename import Mathlib.Tactic.TypeStar import Mathlib.Util.CompileInductive #align_import data.tree from "leanprover-community/mathlib"@"ed989ff568099019c6533a4d94b27d852a5710d8" inductive Tree.{u} (α : Type u) : Type ...
Mathlib/Data/Tree/Basic.lean
90
91
theorem numLeaves_eq_numNodes_succ (x : Tree α) : x.numLeaves = x.numNodes + 1 := by
induction x <;> simp [*, Nat.add_comm, Nat.add_assoc, Nat.add_left_comm]
import Mathlib.LinearAlgebra.AffineSpace.Basis import Mathlib.LinearAlgebra.Matrix.NonsingularInverse #align_import linear_algebra.affine_space.matrix from "leanprover-community/mathlib"@"2de9c37fa71dde2f1c6feff19876dd6a7b1519f0" open Affine Matrix open Set universe u₁ u₂ u₃ u₄ variable {ι : Type u₁} {k : Type...
Mathlib/LinearAlgebra/AffineSpace/Matrix.lean
124
127
theorem toMatrix_mul_toMatrix : b.toMatrix b₂ * b₂.toMatrix b = 1 := by
ext l m change (b.coords (b₂ l) ᵥ* b₂.toMatrix b) m = _ rw [toMatrix_vecMul_coords, coords_apply, ← toMatrix_apply, toMatrix_self]
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
1,781
1,784
theorem blsub_eq_blsub {ι : Type u} (r r' : ι → ι → Prop) [IsWellOrder ι r] [IsWellOrder ι r'] (f : ι → Ordinal.{max u v}) : blsub.{_, v} _ (bfamilyOfFamily' r f) = blsub.{_, v} _ (bfamilyOfFamily' r' f) := by
rw [blsub_eq_lsub', blsub_eq_lsub']
import Mathlib.LinearAlgebra.Dimension.Free import Mathlib.Algebra.Module.Torsion #align_import linear_algebra.dimension from "leanprover-community/mathlib"@"47a5f8186becdbc826190ced4312f8199f9db6a5" noncomputable section universe u v v' u₁' w w' variable {R S : Type u} {M : Type v} {M' : Type v'} {M₁ : Type v}...
Mathlib/LinearAlgebra/Dimension/Constructions.lean
58
64
theorem LinearIndependent.union_of_quotient {M' : Submodule R M} {s : Set M} (hs : s ⊆ M') (hs' : LinearIndependent (ι := s) R Subtype.val) {t : Set M} (ht : LinearIndependent (ι := t) R (Submodule.Quotient.mk (p := M') ∘ Subtype.val)) : LinearIndependent (ι := (s ∪ t : _)) R Subtype.val := by
refine (LinearIndependent.sum_elim_of_quotient (f := Set.embeddingOfSubset s M' hs) (of_comp M'.subtype (by simpa using hs')) Subtype.val ht).to_subtype_range' ?_ simp only [embeddingOfSubset_apply_coe, Sum.elim_range, Subtype.range_val]
import Mathlib.Algebra.Quaternion import Mathlib.Tactic.Ring #align_import algebra.quaternion_basis from "leanprover-community/mathlib"@"3aa5b8a9ed7a7cabd36e6e1d022c9858ab8a8c2d" open Quaternion namespace QuaternionAlgebra structure Basis {R : Type*} (A : Type*) [CommRing R] [Ring A] [Algebra R A] (c₁ c₂ : R) ...
Mathlib/Algebra/QuaternionBasis.lean
138
139
theorem lift_smul (r : R) (x : ℍ[R,c₁,c₂]) : q.lift (r • x) = r • q.lift x := by
simp [lift, mul_smul, ← Algebra.smul_def]
import Mathlib.Data.Finset.Image import Mathlib.Data.List.FinRange #align_import data.fintype.basic from "leanprover-community/mathlib"@"d78597269638367c3863d40d45108f52207e03cf" assert_not_exists MonoidWithZero assert_not_exists MulAction open Function open Nat universe u v variable {α β γ : Type*} class Fi...
Mathlib/Data/Fintype/Basic.lean
241
243
theorem compl_insert : (insert a s)ᶜ = sᶜ.erase a := by
ext simp only [not_or, mem_insert, iff_self_iff, mem_compl, mem_erase]
import Mathlib.Analysis.SpecificLimits.Basic import Mathlib.RingTheory.Polynomial.Bernstein import Mathlib.Topology.ContinuousFunction.Polynomial import Mathlib.Topology.ContinuousFunction.Compact #align_import analysis.special_functions.bernstein from "leanprover-community/mathlib"@"2c1d8ca2812b64f88992a5294ea3dba14...
Mathlib/Analysis/SpecialFunctions/Bernstein.lean
67
71
theorem bernstein_nonneg {n ν : ℕ} {x : I} : 0 ≤ bernstein n ν x := by
simp only [bernstein_apply] have h₁ : (0:ℝ) ≤ x := by unit_interval have h₂ : (0:ℝ) ≤ 1 - x := by unit_interval positivity
import Mathlib.Algebra.Algebra.Subalgebra.Unitization import Mathlib.Analysis.RCLike.Basic import Mathlib.Topology.Algebra.StarSubalgebra import Mathlib.Topology.ContinuousFunction.ContinuousMapZero import Mathlib.Topology.ContinuousFunction.Weierstrass #align_import topology.continuous_function.stone_weierstrass fro...
Mathlib/Topology/ContinuousFunction/StoneWeierstrass.lean
297
300
theorem continuousMap_mem_subalgebra_closure_of_separatesPoints (A : Subalgebra ℝ C(X, ℝ)) (w : A.SeparatesPoints) (f : C(X, ℝ)) : f ∈ A.topologicalClosure := by
rw [subalgebra_topologicalClosure_eq_top_of_separatesPoints A w] simp
import Mathlib.Algebra.Group.Equiv.TypeTags import Mathlib.GroupTheory.FreeAbelianGroup import Mathlib.GroupTheory.FreeGroup.IsFreeGroup import Mathlib.LinearAlgebra.Dimension.StrongRankCondition #align_import group_theory.free_abelian_group_finsupp from "leanprover-community/mathlib"@"47b51515e69f59bca5cf34ef456e600...
Mathlib/GroupTheory/FreeAbelianGroupFinsupp.lean
72
74
theorem Finsupp.toFreeAbelianGroup_toFinsupp {X} (x : FreeAbelianGroup X) : Finsupp.toFreeAbelianGroup (FreeAbelianGroup.toFinsupp x) = x := by
rw [← AddMonoidHom.comp_apply, Finsupp.toFreeAbelianGroup_comp_toFinsupp, AddMonoidHom.id_apply]
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
398
401
theorem det_fromBlocks_one₁₁ (B : Matrix m n α) (C : Matrix n m α) (D : Matrix n n α) : (Matrix.fromBlocks 1 B C D).det = det (D - C * B) := by
haveI : Invertible (1 : Matrix m m α) := invertibleOne rw [det_fromBlocks₁₁, invOf_one, Matrix.mul_one, det_one, one_mul]
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
699
705
theorem two_nsmul_toReal_eq_two_mul_sub_two_pi {θ : Angle} : ((2 : ℕ) • θ).toReal = 2 * θ.toReal - 2 * π ↔ π / 2 < θ.toReal := by
nth_rw 1 [← coe_toReal θ] rw [← coe_nsmul, two_nsmul, ← two_mul, toReal_coe_eq_self_sub_two_pi_iff, Set.mem_Ioc] exact ⟨fun h => by linarith, fun h => ⟨(div_lt_iff' (zero_lt_two' ℝ)).1 h, by linarith [pi_pos, toReal_le_pi θ]⟩⟩
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
154
155
theorem intCast_real_norm (x : ℤ[i]) : (x.norm : ℝ) = Complex.normSq (x : ℂ) := by
rw [Zsqrtd.norm, normSq]; simp
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
867
872
theorem map_lt_add_floor_translationNumber_add_one (x : ℝ) : f x < x + ⌊τ f⌋ + 1 := by
rw [add_assoc] norm_cast refine map_lt_of_translationNumber_lt_int _ ?_ _ push_cast exact lt_floor_add_one _
import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Algebra.Order.Field.Defs import Mathlib.Algebra.Order.Group.Instances import Mathlib.Algebra.Order.Group.MinMax import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Data.Finset.Preimage import Mathlib.Order.Interval.Set.Disjoint import Mathlib.Order.Int...
Mathlib/Order/Filter/AtTopBot.lean
323
326
theorem Subsingleton.atTop_eq (α) [Subsingleton α] [Preorder α] : (atTop : Filter α) = ⊤ := by
refine top_unique fun s hs x => ?_ rw [atTop, ciInf_subsingleton x, mem_principal] at hs exact hs left_mem_Ici