Context
stringlengths
57
85k
file_name
stringlengths
21
79
start
int64
14
2.42k
end
int64
18
2.43k
theorem
stringlengths
25
2.71k
proof
stringlengths
5
10.6k
import Mathlib.Algebra.Group.Subgroup.Basic import Mathlib.Algebra.Group.Submonoid.Membership import Mathlib.Data.Finite.Card #align_import group_theory.subgroup.finite from "leanprover-community/mathlib"@"f93c11933efbc3c2f0299e47b8ff83e9b539cbf6" variable {G : Type*} [Group G] variable {A : Type*} [AddGroup A] ...
Mathlib/Algebra/Group/Subgroup/Finite.lean
127
137
theorem eq_top_of_card_eq [Finite H] (h : Nat.card H = Nat.card G) : H = ⊤ := by
have : Nonempty H := ⟨1, one_mem H⟩ have h' : Nat.card H ≠ 0 := Nat.card_pos.ne' have : Finite G := (Nat.finite_of_card_ne_zero (h ▸ h')) have : Fintype G := Fintype.ofFinite G have : Fintype H := Fintype.ofFinite H rw [Nat.card_eq_fintype_card, Nat.card_eq_fintype_card] at h rw [SetLike.ext'_iff, coe_to...
import Mathlib.Data.List.Basic namespace List variable {α β : Type*} #align list.length_enum_from List.enumFrom_length #align list.length_enum List.enum_length @[simp] theorem get?_enumFrom : ∀ n (l : List α) m, get? (enumFrom n l) m = (get? l m).map fun a => (n + m, a) | n, [], m => rfl | n, a :: l, 0 =...
Mathlib/Data/List/Enum.lean
169
170
theorem enumFrom_eq_nil {n : ℕ} {l : List α} : List.enumFrom n l = [] ↔ l = [] := by
cases l <;> simp
import Mathlib.Data.Matrix.Basic variable {l m n o : Type*} universe u v w variable {R : Type*} {α : Type v} {β : Type w} namespace Matrix def col (w : m → α) : Matrix m Unit α := of fun x _ => w x #align matrix.col Matrix.col -- TODO: set as an equation lemma for `col`, see mathlib4#3024 @[simp] theorem col...
Mathlib/Data/Matrix/RowCol.lean
200
204
theorem updateRow_apply [DecidableEq m] {i' : m} : updateRow M i b i' j = if i' = i then b j else M i' j := by
by_cases h : i' = i · rw [h, updateRow_self, if_pos rfl] · rw [updateRow_ne h, if_neg h]
import Mathlib.Data.ZMod.Basic import Mathlib.GroupTheory.Exponent #align_import group_theory.specific_groups.dihedral from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" inductive DihedralGroup (n : ℕ) : Type | r : ZMod n → DihedralGroup n | sr : ZMod n → DihedralGroup n derivin...
Mathlib/GroupTheory/SpecificGroups/Dihedral.lean
146
149
theorem r_one_pow_n : r (1 : ZMod n) ^ n = 1 := by
rw [r_one_pow, one_def] congr 1 exact ZMod.natCast_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
581
581
theorem sub_zero (a : Ordinal) : a - 0 = a := by
simpa only [zero_add] using add_sub_cancel 0 a
import Mathlib.Init.Core import Mathlib.RingTheory.Polynomial.Cyclotomic.Roots import Mathlib.NumberTheory.NumberField.Basic import Mathlib.FieldTheory.Galois #align_import number_theory.cyclotomic.basic from "leanprover-community/mathlib"@"4b05d3f4f0601dca8abf99c4ec99187682ed0bba" open Polynomial Algebra FiniteD...
Mathlib/NumberTheory/Cyclotomic/Basic.lean
132
150
theorem trans (C : Type w) [CommRing C] [Algebra A C] [Algebra B C] [IsScalarTower A B C] [hS : IsCyclotomicExtension S A B] [hT : IsCyclotomicExtension T B C] (h : Function.Injective (algebraMap B C)) : IsCyclotomicExtension (S ∪ T) A C := by
refine ⟨fun hn => ?_, fun x => ?_⟩ · cases' hn with hn hn · obtain ⟨b, hb⟩ := ((isCyclotomicExtension_iff _ _ _).1 hS).1 hn refine ⟨algebraMap B C b, ?_⟩ exact hb.map_of_injective h · exact ((isCyclotomicExtension_iff _ _ _).1 hT).1 hn · refine adjoin_induction (((isCyclotomicExtension_iff T ...
import Mathlib.Order.Filter.Basic import Mathlib.Topology.Bases import Mathlib.Data.Set.Accumulate import Mathlib.Topology.Bornology.Basic import Mathlib.Topology.LocallyFinite open Set Filter Topology TopologicalSpace Classical Function universe u v variable {X : Type u} {Y : Type v} {ι : Type*} variable [Topolog...
Mathlib/Topology/Compactness/Compact.lean
57
64
theorem IsCompact.compl_mem_sets_of_nhdsWithin (hs : IsCompact s) {f : Filter X} (hf : ∀ x ∈ s, ∃ t ∈ 𝓝[s] x, tᶜ ∈ f) : sᶜ ∈ f := by
refine hs.compl_mem_sets fun x hx => ?_ rcases hf x hx with ⟨t, ht, hst⟩ replace ht := mem_inf_principal.1 ht apply mem_inf_of_inter ht hst rintro x ⟨h₁, h₂⟩ hs exact h₂ (h₁ hs)
import Mathlib.Algebra.Order.Monoid.Unbundled.Pow import Mathlib.Algebra.Order.Ring.Defs import Mathlib.Algebra.Ring.Parity #align_import algebra.group_power.order from "leanprover-community/mathlib"@"00f91228655eecdcd3ac97a7fd8dbcb139fe990a" -- We should need only a minimal development of sets in order to get her...
Mathlib/Algebra/Order/Ring/Basic.lean
32
32
theorem map_neg (x : R) : f (-x) = f x := by
rw [← neg_one_mul, map_mul, map_neg_one, one_mul]
import Mathlib.Algebra.EuclideanDomain.Defs import Mathlib.Algebra.Ring.Divisibility.Basic import Mathlib.Algebra.Ring.Regular import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Algebra.Ring.Basic #align_import algebra.euclidean_domain.basic from "leanprover-community/mathlib"@"bf9bbbcf0c1c1ead18280b0d0...
Mathlib/Algebra/EuclideanDomain/Basic.lean
203
204
theorem xgcdAux_val (x y : R) : xgcdAux x 1 0 y 0 1 = (gcd x y, xgcd x y) := by
rw [xgcd, ← xgcdAux_fst x y 1 0 0 1]
import Mathlib.Data.ZMod.Basic import Mathlib.GroupTheory.Index import Mathlib.GroupTheory.GroupAction.ConjAct import Mathlib.GroupTheory.GroupAction.Quotient import Mathlib.GroupTheory.Perm.Cycle.Type import Mathlib.GroupTheory.SpecificGroups.Cyclic import Mathlib.Tactic.IntervalCases #align_import group_theory.p_gr...
Mathlib/GroupTheory/PGroup.lean
54
65
theorem iff_card [Fact p.Prime] [Fintype G] : IsPGroup p G ↔ ∃ n : ℕ, card G = p ^ n := by
have hG : card G ≠ 0 := card_ne_zero refine ⟨fun h => ?_, fun ⟨n, hn⟩ => of_card hn⟩ suffices ∀ q ∈ Nat.factors (card G), q = p by use (card G).factors.length rw [← List.prod_replicate, ← List.eq_replicate_of_mem this, Nat.prod_factors hG] intro q hq obtain ⟨hq1, hq2⟩ := (Nat.mem_factors hG).mp hq ...
import Mathlib.Logic.Equiv.Option import Mathlib.Order.RelIso.Basic import Mathlib.Order.Disjoint import Mathlib.Order.WithBot import Mathlib.Tactic.Monotonicity.Attr import Mathlib.Util.AssertExists #align_import order.hom.basic from "leanprover-community/mathlib"@"62a5626868683c104774de8d85b9855234ac807c" open ...
Mathlib/Order/Hom/Basic.lean
945
947
theorem refl_trans (e : α ≃o β) : (refl α).trans e = e := by
ext x rfl
import Mathlib.CategoryTheory.Closed.Cartesian import Mathlib.CategoryTheory.Limits.Preserves.Shapes.BinaryProducts import Mathlib.CategoryTheory.Adjunction.FullyFaithful #align_import category_theory.closed.functor from "leanprover-community/mathlib"@"cea27692b3fdeb328a2ddba6aabf181754543184" noncomputable secti...
Mathlib/CategoryTheory/Closed/Functor.lean
100
103
theorem uncurry_expComparison (A B : C) : CartesianClosed.uncurry ((expComparison F A).app B) = inv (prodComparison F _ _) ≫ F.map ((exp.ev _).app _) := by
rw [uncurry_eq, expComparison_ev]
import Mathlib.Analysis.InnerProductSpace.Projection import Mathlib.Geometry.Euclidean.PerpBisector import Mathlib.Algebra.QuadraticDiscriminant #align_import geometry.euclidean.basic from "leanprover-community/mathlib"@"2de9c37fa71dde2f1c6feff19876dd6a7b1519f0" noncomputable section open scoped Classical open ...
Mathlib/Geometry/Euclidean/Basic.lean
442
450
theorem orthogonalProjection_vadd_eq_self {s : AffineSubspace ℝ P} [Nonempty s] [HasOrthogonalProjection s.direction] {p : P} (hp : p ∈ s) {v : V} (hv : v ∈ s.directionᗮ) : orthogonalProjection s (v +ᵥ p) = ⟨p, hp⟩ := by
have h := vsub_orthogonalProjection_mem_direction_orthogonal s (v +ᵥ p) rw [vadd_vsub_assoc, Submodule.add_mem_iff_right _ hv] at h refine (eq_of_vsub_eq_zero ?_).symm ext refine Submodule.disjoint_def.1 s.direction.orthogonal_disjoint _ ?_ h exact (_ : s.direction).2
import Mathlib.Topology.MetricSpace.HausdorffDistance #align_import topology.metric_space.pi_nat from "leanprover-community/mathlib"@"49b7f94aab3a3bdca1f9f34c5d818afb253b3993" noncomputable section open scoped Classical open Topology Filter open TopologicalSpace Set Metric Filter Function attribute [local simp...
Mathlib/Topology/MetricSpace/PiNat.lean
247
251
theorem cylinder_eq_res (x : ℕ → α) (n : ℕ) : cylinder x n = { y | res y n = res x n } := by
ext y dsimp [cylinder] rw [res_eq_res]
import Mathlib.Topology.Gluing import Mathlib.Geometry.RingedSpace.OpenImmersion import Mathlib.Geometry.RingedSpace.LocallyRingedSpace.HasColimits #align_import algebraic_geometry.presheafed_space.gluing from "leanprover-community/mathlib"@"533f62f4dd62a5aad24a04326e6e787c8f7e98b1" set_option linter.uppercaseLean...
Mathlib/Geometry/RingedSpace/PresheafedSpace/Gluing.lean
456
488
theorem π_ιInvApp_π (i j : D.J) (U : Opens (D.U i).carrier) : D.diagramOverOpenπ U i ≫ D.ιInvAppπEqMap U ≫ D.ιInvApp U ≫ D.diagramOverOpenπ U j = D.diagramOverOpenπ U j := by
-- Porting note: originally, the proof of monotonicity was left a blank and proved in the end -- but Lean 4 doesn't like this any more, so the proof is restructured rw [← @cancel_mono (f := (componentwiseDiagram 𝖣.diagram.multispan _).map (Quiver.Hom.op (WalkingMultispan.Hom.snd (i, j))) ≫ 𝟙 _) _ _ (by ...
import Mathlib.Data.Set.Image import Mathlib.Order.Interval.Set.Basic #align_import data.set.intervals.with_bot_top from "leanprover-community/mathlib"@"d012cd09a9b256d870751284dd6a29882b0be105" open Set variable {α : Type*} namespace WithTop @[simp] theorem preimage_coe_top : (some : α → WithTop α) ⁻¹' {⊤} =...
Mathlib/Order/Interval/Set/WithBotTop.lean
80
81
theorem preimage_coe_Ico_top : (some : α → WithTop α) ⁻¹' Ico a ⊤ = Ici a := by
simp [← Ici_inter_Iio]
import Mathlib.Analysis.Asymptotics.Asymptotics import Mathlib.Analysis.NormedSpace.Basic #align_import analysis.asymptotics.theta from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open Filter open Topology namespace Asymptotics set_option linter.uppercaseLean3 false -- is_Theta v...
Mathlib/Analysis/Asymptotics/Theta.lean
214
216
theorem IsTheta.tendsto_zero_iff (h : f'' =Θ[l] g'') : Tendsto f'' l (𝓝 0) ↔ Tendsto g'' l (𝓝 0) := by
simp only [← isLittleO_one_iff ℝ, h.isLittleO_congr_left]
import Mathlib.CategoryTheory.Limits.Creates import Mathlib.CategoryTheory.Comma.Over import Mathlib.CategoryTheory.IsConnected #align_import category_theory.limits.constructions.over.connected from "leanprover-community/mathlib"@"d6814c584384ddf2825ff038e868451a7c956f31" universe v u -- morphism levels before o...
Mathlib/CategoryTheory/Limits/Constructions/Over/Connected.lean
60
62
theorem raised_cone_lowers_to_original [IsConnected J] {B : C} {F : J ⥤ Over B} (c : Cone (F ⋙ forget B)) : (forget B).mapCone (raiseCone c) = c := by
aesop_cat
import Mathlib.MeasureTheory.Integral.Lebesgue import Mathlib.Topology.MetricSpace.ThickenedIndicator open MeasureTheory Topology Metric Filter Set ENNReal NNReal open scoped Topology ENNReal NNReal BoundedContinuousFunction section auxiliary namespace MeasureTheory variable {Ω : Type*} [TopologicalSpace Ω] [Mea...
Mathlib/MeasureTheory/Measure/HasOuterApproxClosed.lean
110
119
theorem tendsto_lintegral_thickenedIndicator_of_isClosed {Ω : Type*} [MeasurableSpace Ω] [PseudoEMetricSpace Ω] [OpensMeasurableSpace Ω] (μ : Measure Ω) [IsFiniteMeasure μ] {F : Set Ω} (F_closed : IsClosed F) {δs : ℕ → ℝ} (δs_pos : ∀ n, 0 < δs n) (δs_lim : Tendsto δs atTop (𝓝 0)) : Tendsto (fun n ↦ lin...
apply measure_of_cont_bdd_of_tendsto_indicator μ F_closed.measurableSet (fun n ↦ thickenedIndicator (δs_pos n) F) fun n ω ↦ thickenedIndicator_le_one (δs_pos n) F ω have key := thickenedIndicator_tendsto_indicator_closure δs_pos δs_lim F rwa [F_closed.closure_eq] at key
import Mathlib.Combinatorics.SimpleGraph.DegreeSum import Mathlib.Combinatorics.SimpleGraph.Subgraph #align_import combinatorics.simple_graph.matching from "leanprover-community/mathlib"@"138448ae98f529ef34eeb61114191975ee2ca508" universe u namespace SimpleGraph variable {V : Type u} {G : SimpleGraph V} (M : Su...
Mathlib/Combinatorics/SimpleGraph/Matching.lean
127
130
theorem IsPerfectMatching.even_card {M : Subgraph G} [Fintype V] (h : M.IsPerfectMatching) : Even (Fintype.card V) := by
classical simpa only [h.2.card_verts] using IsMatching.even_card h.1
import Mathlib.Algebra.Module.Equiv import Mathlib.Algebra.Module.Hom import Mathlib.Algebra.Module.Prod import Mathlib.Algebra.Module.Submodule.Range import Mathlib.Data.Set.Finite import Mathlib.Order.ConditionallyCompleteLattice.Basic import Mathlib.Tactic.Abel #align_import linear_algebra.basic from "leanprover-c...
Mathlib/LinearAlgebra/Basic.lean
138
138
theorem ofEq_rfl : ofEq p p rfl = LinearEquiv.refl R p := by
ext; rfl
import Mathlib.Algebra.ContinuedFractions.Computation.Basic import Mathlib.Algebra.ContinuedFractions.Translations #align_import algebra.continued_fractions.computation.translations from "leanprover-community/mathlib"@"a7e36e48519ab281320c4d192da6a7b348ce40ad" namespace GeneralizedContinuedFraction open Generali...
Mathlib/Algebra/ContinuedFractions/Computation/Translations.lean
163
165
theorem of_h_eq_intFractPair_seq1_fst_b : (of v).h = (IntFractPair.seq1 v).fst.b := by
cases aux_seq_eq : IntFractPair.seq1 v simp [of, aux_seq_eq]
import Mathlib.Order.Filter.Prod #align_import order.filter.n_ary from "leanprover-community/mathlib"@"78f647f8517f021d839a7553d5dc97e79b508dea" open Function Set open Filter namespace Filter variable {α α' β β' γ γ' δ δ' ε ε' : Type*} {m : α → β → γ} {f f₁ f₂ : Filter α} {g g₁ g₂ : Filter β} {h h₁ h₂ : Filt...
Mathlib/Order/Filter/NAry.lean
160
160
theorem map₂_right [NeBot f] : map₂ (fun _ y => y) f g = g := by
rw [map₂_swap, map₂_left]
import Mathlib.Data.Fintype.Card import Mathlib.Computability.Language import Mathlib.Tactic.NormNum #align_import computability.DFA from "leanprover-community/mathlib"@"32253a1a1071173b33dc7d6a218cf722c6feb514" open Computability universe u v -- Porting note: Required as `DFA` is used in mathlib3 set_option li...
Mathlib/Computability/DFA.lean
98
98
theorem mem_accepts (x : List α) : x ∈ M.accepts ↔ M.evalFrom M.start x ∈ M.accept := by
rfl
import Mathlib.GroupTheory.GroupAction.BigOperators import Mathlib.Logic.Equiv.Fin import Mathlib.Algebra.BigOperators.Pi import Mathlib.Algebra.Module.Prod import Mathlib.Algebra.Module.Submodule.Ker #align_import linear_algebra.pi from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" un...
Mathlib/LinearAlgebra/Pi.lean
249
253
theorem update_apply (f : (i : ι) → M₂ →ₗ[R] φ i) (c : M₂) (i j : ι) (b : M₂ →ₗ[R] φ i) : (update f i b j) c = update (fun i => f i c) i (b c) j := by
by_cases h : j = i · rw [h, update_same, update_same] · rw [update_noteq h, update_noteq h]
import Mathlib.Algebra.Group.Defs import Mathlib.Algebra.GroupWithZero.Defs import Mathlib.Data.Int.Cast.Defs import Mathlib.Tactic.Spread import Mathlib.Util.AssertExists #align_import algebra.ring.defs from "leanprover-community/mathlib"@"76de8ae01554c3b37d66544866659ff174e66e1f" universe u v w x variable {α : ...
Mathlib/Algebra/Ring/Defs.lean
197
198
theorem mul_ite {α} [Mul α] (P : Prop) [Decidable P] (a b c : α) : (a * if P then b else c) = if P then a * b else a * c := by
split_ifs <;> rfl
import Mathlib.ModelTheory.Syntax import Mathlib.ModelTheory.Semantics import Mathlib.Algebra.Ring.Equiv variable {α : Type*} namespace FirstOrder open FirstOrder inductive ringFunc : ℕ → Type | add : ringFunc 2 | mul : ringFunc 2 | neg : ringFunc 1 | zero : ringFunc 0 | one : ringFunc 0 deriving D...
Mathlib/ModelTheory/Algebra/Ring/Basic.lean
190
192
theorem realize_neg (x : ring.Term α) (v : α → R) : Term.realize v (-x) = -Term.realize v x := by
simp [neg_def, funMap_neg]
import Mathlib.Algebra.Bounds import Mathlib.Algebra.Order.Archimedean import Mathlib.Data.Real.Basic import Mathlib.Order.Interval.Set.Disjoint #align_import data.real.basic from "leanprover-community/mathlib"@"cb42593171ba005beaaf4549fcfe0dece9ada4c9" open scoped Classical open Pointwise CauSeq namespace Real ...
Mathlib/Data/Real/Archimedean.lean
356
360
theorem not_bddAbove_coe : ¬ (BddAbove <| range (fun (x : ℚ) ↦ (x : ℝ))) := by
dsimp only [BddAbove, upperBounds] rw [Set.not_nonempty_iff_eq_empty] ext simpa using exists_rat_gt _
import Mathlib.LinearAlgebra.Contraction import Mathlib.LinearAlgebra.Matrix.Charpoly.Coeff #align_import linear_algebra.trace from "leanprover-community/mathlib"@"4cf7ca0e69e048b006674cf4499e5c7d296a89e0" noncomputable section universe u v w namespace LinearMap open Matrix open FiniteDimensional open Tensor...
Mathlib/LinearAlgebra/Trace.lean
294
307
theorem trace_conj' (f : M →ₗ[R] M) (e : M ≃ₗ[R] N) : trace R N (e.conj f) = trace R M f := by
classical by_cases hM : ∃ s : Finset M, Nonempty (Basis s R M) · obtain ⟨s, ⟨b⟩⟩ := hM haveI := Module.Finite.of_basis b haveI := (Module.free_def R M).mpr ⟨_, ⟨b⟩⟩ haveI := Module.Finite.of_basis (b.map e) haveI := (Module.free_def R N).mpr ⟨_, ⟨(b.map e).reindex (e.toEquiv.image _)⟩⟩ rw [e....
import Mathlib.Algebra.IsPrimePow import Mathlib.NumberTheory.ArithmeticFunction import Mathlib.Analysis.SpecialFunctions.Log.Basic #align_import number_theory.von_mangoldt from "leanprover-community/mathlib"@"c946d6097a6925ad16d7ec55677bbc977f9846de" namespace ArithmeticFunction open Finset Nat open scoped Arit...
Mathlib/NumberTheory/VonMangoldt.lean
131
131
theorem zeta_mul_vonMangoldt : (ζ : ArithmeticFunction ℝ) * Λ = log := by
rw [mul_comm]; simp
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
354
362
theorem mk_pow (x : ℕ × K) (n : ℕ) : mk K p x ^ n = mk K p (x.1, x.2 ^ n) := by
induction n with | zero => rw [pow_zero, pow_zero, one_def, mk_eq_iff] exact ⟨0, by simp_rw [← coe_iterateFrobenius, map_one]⟩ | succ n ih => rw [pow_succ, pow_succ, ih, mk_mul_mk, mk_eq_iff] exact ⟨0, by simp_rw [iterate_frobenius, add_zero, mul_pow, ← pow_mul, ← pow_add, mul_assoc, ← pow_...
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
917
920
theorem biInter_inter {ι α : Type*} {s : Set ι} (hs : s.Nonempty) (f : ι → Set α) (t : Set α) : ⋂ i ∈ s, f i ∩ t = (⋂ i ∈ s, f i) ∩ t := by
haveI : Nonempty s := hs.to_subtype simp [biInter_eq_iInter, ← iInter_inter]
import Mathlib.Geometry.Manifold.MFDeriv.Defs #align_import geometry.manifold.mfderiv from "leanprover-community/mathlib"@"e473c3198bb41f68560cab68a0529c854b618833" noncomputable section open scoped Topology Manifold open Set Bundle section DerivativesProperties variable {𝕜 : Type*} [NontriviallyNormedFiel...
Mathlib/Geometry/Manifold/MFDeriv/Basic.lean
765
770
theorem tangentMap_comp_at (p : TangentBundle I M) (hg : MDifferentiableAt I' I'' g (f p.1)) (hf : MDifferentiableAt I I' f p.1) : tangentMap I I'' (g ∘ f) p = tangentMap I' I'' g (tangentMap I I' f p) := by
simp only [tangentMap, mfld_simps] rw [mfderiv_comp p.1 hg hf] rfl
import Mathlib.Analysis.NormedSpace.Exponential import Mathlib.Analysis.Matrix import Mathlib.LinearAlgebra.Matrix.ZPow import Mathlib.LinearAlgebra.Matrix.Hermitian import Mathlib.LinearAlgebra.Matrix.Symmetric import Mathlib.Topology.UniformSpace.Matrix #align_import analysis.normed_space.matrix_exponential from "l...
Mathlib/Analysis/NormedSpace/MatrixExponential.lean
80
81
theorem exp_diagonal (v : m → 𝔸) : exp 𝕂 (diagonal v) = diagonal (exp 𝕂 v) := by
simp_rw [exp_eq_tsum, diagonal_pow, ← diagonal_smul, ← diagonal_tsum]
import Mathlib.Analysis.InnerProductSpace.Dual import Mathlib.Analysis.InnerProductSpace.PiL2 #align_import analysis.inner_product_space.adjoint from "leanprover-community/mathlib"@"46b633fd842bef9469441c0209906f6dddd2b4f5" noncomputable section open RCLike open scoped ComplexConjugate variable {𝕜 E F G : Type...
Mathlib/Analysis/InnerProductSpace/Adjoint.lean
168
171
theorem eq_adjoint_iff (A : E →L[𝕜] F) (B : F →L[𝕜] E) : A = B† ↔ ∀ x y, ⟪A x, y⟫ = ⟪x, B y⟫ := by
refine ⟨fun h x y => by rw [h, adjoint_inner_left], fun h => ?_⟩ ext x exact ext_inner_right 𝕜 fun y => by simp only [adjoint_inner_left, h x y]
import Mathlib.Algebra.Order.Ring.Abs import Mathlib.Algebra.Polynomial.Derivative import Mathlib.Data.Nat.Factorial.DoubleFactorial #align_import ring_theory.polynomial.hermite.basic from "leanprover-community/mathlib"@"938d3db9c278f8a52c0f964a405806f0f2b09b74" noncomputable section open Polynomial namespace P...
Mathlib/RingTheory/Polynomial/Hermite/Basic.lean
133
143
theorem coeff_hermite_of_odd_add {n k : ℕ} (hnk : Odd (n + k)) : coeff (hermite n) k = 0 := by
induction' n with n ih generalizing k · rw [zero_add k] at hnk exact coeff_hermite_of_lt hnk.pos · cases' k with k · rw [Nat.succ_add_eq_add_succ] at hnk rw [coeff_hermite_succ_zero, ih hnk, neg_zero] · rw [coeff_hermite_succ_succ, ih, ih, mul_zero, sub_zero] · rwa [Nat.succ_add_eq_add_su...
import Mathlib.Algebra.GroupPower.IterateHom import Mathlib.Algebra.Polynomial.Eval import Mathlib.GroupTheory.GroupAction.Ring #align_import data.polynomial.derivative from "leanprover-community/mathlib"@"bbeb185db4ccee8ed07dc48449414ebfa39cb821" noncomputable section open Finset open Polynomial namespace Pol...
Mathlib/Algebra/Polynomial/Derivative.lean
92
93
theorem derivative_C_mul_X (a : R) : derivative (C a * X) = C a := by
simp [C_mul_X_eq_monomial, derivative_monomial, Nat.cast_one, mul_one]
import Mathlib.Analysis.NormedSpace.Multilinear.Basic #align_import analysis.normed_space.multilinear from "leanprover-community/mathlib"@"f40476639bac089693a489c9e354ebd75dc0f886" suppress_compilation noncomputable section open NNReal Finset Metric ContinuousMultilinearMap Fin Function universe u v v' wE wE...
Mathlib/Analysis/NormedSpace/Multilinear/Curry.lean
290
293
theorem ContinuousMultilinearMap.uncurry_curryRight (f : ContinuousMultilinearMap 𝕜 Ei G) : f.curryRight.uncurryRight = f := by
ext m rw [uncurryRight_apply, curryRight_apply, snoc_init_self]
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
83
92
theorem StableUnderBaseChange.baseChange_map [HasPullbacks C] {P : MorphismProperty C} (hP : StableUnderBaseChange P) {S S' : C} (f : S' ⟶ S) {X Y : Over S} (g : X ⟶ Y) (H : P g.left) : P ((Over.baseChange f).map g).left := by
let e := pullbackRightPullbackFstIso Y.hom f g.left ≪≫ pullback.congrHom (g.w.trans (Category.comp_id _)) rfl have : e.inv ≫ pullback.snd = ((Over.baseChange f).map g).left := by ext <;> dsimp [e] <;> simp rw [← this, hP.respectsIso.cancel_left_isIso] exact hP.snd _ _ H
import Mathlib.Data.Fintype.Option import Mathlib.Topology.Separation import Mathlib.Topology.Sets.Opens #align_import topology.alexandroff from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" open Set Filter Topology variable {X : Type*} def OnePoint (X : Type*) := Option X #ali...
Mathlib/Topology/Compactification/OnePoint.lean
357
359
theorem tendsto_nhds_infty' {α : Type*} {f : OnePoint X → α} {l : Filter α} : Tendsto f (𝓝 ∞) l ↔ Tendsto f (pure ∞) l ∧ Tendsto (f ∘ (↑)) (coclosedCompact X) l := by
simp [nhds_infty_eq, and_comm]
import Mathlib.MeasureTheory.Function.L1Space import Mathlib.MeasureTheory.Function.SimpleFuncDense #align_import measure_theory.function.simple_func_dense_lp from "leanprover-community/mathlib"@"5a2df4cd59cb31e97a516d4603a14bed5c2f9425" noncomputable section set_option linter.uppercaseLean3 false open Set Func...
Mathlib/MeasureTheory/Function/SimpleFuncDenseLp.lean
77
82
theorem norm_approxOn_y₀_le [OpensMeasurableSpace E] {f : β → E} (hf : Measurable f) {s : Set E} {y₀ : E} (h₀ : y₀ ∈ s) [SeparableSpace s] (x : β) (n : ℕ) : ‖approxOn f hf s y₀ h₀ n x - y₀‖ ≤ ‖f x - y₀‖ + ‖f x - y₀‖ := by
have := edist_approxOn_y0_le hf h₀ x n repeat rw [edist_comm y₀, edist_eq_coe_nnnorm_sub] at this exact mod_cast this
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
453
454
theorem toIcoMod_sub_zsmul (a b : α) (m : ℤ) : toIcoMod hp a (b - m • p) = toIcoMod hp a b := by
rw [sub_eq_add_neg, ← neg_smul, toIcoMod_add_zsmul]
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
395
396
theorem map_fract_sub_fract_eq (x : ℝ) : f (fract x) - fract x = f x - x := by
rw [Int.fract, f.map_sub_int, sub_sub_sub_cancel_right]
import Mathlib.Data.Nat.SuccPred import Mathlib.Algebra.CharZero.Lemmas import Mathlib.Algebra.Order.Sub.WithTop import Mathlib.Algebra.Order.Ring.WithTop #align_import data.enat.basic from "leanprover-community/mathlib"@"ceb887ddf3344dab425292e497fa2af91498437c" def ENat : Type := WithTop ℕ deriving Zero, --...
Mathlib/Data/ENat/Basic.lean
256
261
theorem nat_induction {P : ℕ∞ → Prop} (a : ℕ∞) (h0 : P 0) (hsuc : ∀ n : ℕ, P n → P n.succ) (htop : (∀ n : ℕ, P n) → P ⊤) : P a := by
have A : ∀ n : ℕ, P n := fun n => Nat.recOn n h0 hsuc cases a · exact htop A · exact A _
import Mathlib.Algebra.Category.ModuleCat.EpiMono import Mathlib.CategoryTheory.ConcreteCategory.Elementwise #align_import algebra.category.Module.kernels from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" set_option linter.uppercaseLean3 false open CategoryTheory CategoryTheory.Limits...
Mathlib/Algebra/Category/ModuleCat/Kernels.lean
137
140
theorem cokernel_π_ext {M N : ModuleCat.{u} R} (f : M ⟶ N) {x y : N} (m : M) (w : x = y + f m) : cokernel.π f x = cokernel.π f y := by
subst w simpa only [map_add, add_right_eq_self] using cokernel.condition_apply f m
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
480
487
theorem continuous_inf_dom_right₂ {X Y Z} {f : X → Y → Z} {ta1 ta2 : TopologicalSpace X} {tb1 tb2 : TopologicalSpace Y} {tc1 : TopologicalSpace Z} (h : by haveI := ta2; haveI := tb2; exact Continuous fun p : X × Y => f p.1 p.2) : by haveI := ta1 ⊓ ta2; haveI := tb1 ⊓ tb2; exact Continuous fun p : X × Y => f...
have ha := @continuous_inf_dom_right _ _ id ta1 ta2 ta2 (@continuous_id _ (id _)) have hb := @continuous_inf_dom_right _ _ id tb1 tb2 tb2 (@continuous_id _ (id _)) have h_continuous_id := @Continuous.prod_map _ _ _ _ ta2 tb2 (ta1 ⊓ ta2) (tb1 ⊓ tb2) _ _ ha hb exact @Continuous.comp _ _ _ (id _) (id _) _ _ _ h h...
import Mathlib.Algebra.Order.BigOperators.Ring.Finset import Mathlib.Data.Nat.Totient import Mathlib.GroupTheory.OrderOfElement import Mathlib.GroupTheory.Subgroup.Simple import Mathlib.Tactic.Group import Mathlib.GroupTheory.Exponent #align_import group_theory.specific_groups.cyclic from "leanprover-community/mathli...
Mathlib/GroupTheory/SpecificGroups/Cyclic.lean
105
107
theorem Nontrivial.of_not_isCyclic (nc : ¬IsCyclic α) : Nontrivial α := by
contrapose! nc exact @isCyclic_of_subsingleton _ _ (not_nontrivial_iff_subsingleton.mp nc)
import Mathlib.Analysis.Normed.Group.Seminorm import Mathlib.Order.LiminfLimsup import Mathlib.Topology.Instances.Rat import Mathlib.Topology.MetricSpace.Algebra import Mathlib.Topology.MetricSpace.IsometricSMul import Mathlib.Topology.Sequences #align_import analysis.normed.group.basic from "leanprover-community/mat...
Mathlib/Analysis/Normed/Group/Basic.lean
590
590
theorem norm_one' : ‖(1 : E)‖ = 0 := by
rw [← dist_one_right, dist_self]
import Mathlib.Algebra.Homology.Linear import Mathlib.Algebra.Homology.ShortComplex.HomologicalComplex import Mathlib.Tactic.Abel #align_import algebra.homology.homotopy from "leanprover-community/mathlib"@"618ea3d5c99240cd7000d8376924906a148bf9ff" universe v u open scoped Classical noncomputable section open ...
Mathlib/Algebra/Homology/Homotopy.lean
321
329
theorem comp_nullHomotopicMap' (f : C ⟶ D) (hom : ∀ i j, c.Rel j i → (D.X i ⟶ E.X j)) : f ≫ nullHomotopicMap' hom = nullHomotopicMap' fun i j hij => f.f i ≫ hom i j hij := by
ext n erw [comp_nullHomotopicMap] congr ext i j split_ifs · rfl · rw [comp_zero]
import Mathlib.CategoryTheory.CofilteredSystem import Mathlib.Combinatorics.SimpleGraph.Connectivity import Mathlib.Data.Finite.Set #align_import combinatorics.simple_graph.ends.defs from "leanprover-community/mathlib"@"b99e2d58a5e6861833fa8de11e51a81144258db4" universe u variable {V : Type u} (G : SimpleGraph V...
Mathlib/Combinatorics/SimpleGraph/Ends/Defs.lean
71
75
theorem componentComplMk_eq_of_adj (G : SimpleGraph V) {v w : V} (vK : v ∉ K) (wK : w ∉ K) (a : G.Adj v w) : G.componentComplMk vK = G.componentComplMk wK := by
rw [ConnectedComponent.eq] apply Adj.reachable exact a
import Mathlib.Algebra.Order.BigOperators.Group.Finset import Mathlib.Data.Nat.Factors import Mathlib.Order.Interval.Finset.Nat #align_import number_theory.divisors from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" open scoped Classical open Finset namespace Nat variable (n : ℕ) d...
Mathlib/NumberTheory/Divisors.lean
382
386
theorem divisors_prime_pow {p : ℕ} (pp : p.Prime) (k : ℕ) : divisors (p ^ k) = (Finset.range (k + 1)).map ⟨(p ^ ·), Nat.pow_right_injective pp.two_le⟩ := by
ext a rw [mem_divisors_prime_pow pp] simp [Nat.lt_succ, eq_comm]
import Mathlib.Topology.Instances.Real import Mathlib.Order.Filter.Archimedean #align_import analysis.subadditive from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section open Set Filter Topology def Subadditive (u : ℕ → ℝ) : Prop := ∀ m n, u (m + n) ≤ u m + u n #al...
Mathlib/Analysis/Subadditive.lean
62
81
theorem eventually_div_lt_of_div_lt {L : ℝ} {n : ℕ} (hn : n ≠ 0) (hL : u n / n < L) : ∀ᶠ p in atTop, u p / p < L := by
/- It suffices to prove the statement for each arithmetic progression `(n * · + r)`. -/ refine .atTop_of_arithmetic hn fun r _ => ?_ /- `(k * u n + u r) / (k * n + r)` tends to `u n / n < L`, hence `(k * u n + u r) / (k * n + r) < L` for sufficiently large `k`. -/ have A : Tendsto (fun x : ℝ => (u n + u r / ...
import Mathlib.Analysis.SpecialFunctions.ImproperIntegrals import Mathlib.Analysis.Calculus.ParametricIntegral import Mathlib.MeasureTheory.Measure.Haar.NormedSpace #align_import analysis.mellin_transform from "leanprover-community/mathlib"@"917c3c072e487b3cccdbfeff17e75b40e45f66cb" open MeasureTheory Set Filter A...
Mathlib/Analysis/MellinTransform.lean
196
205
theorem mellin_convergent_iff_norm [NormedSpace ℂ E] {f : ℝ → E} {T : Set ℝ} (hT : T ⊆ Ioi 0) (hT' : MeasurableSet T) (hfc : AEStronglyMeasurable f <| volume.restrict <| Ioi 0) {s : ℂ} : IntegrableOn (fun t : ℝ => (t : ℂ) ^ (s - 1) • f t) T ↔ IntegrableOn (fun t : ℝ => t ^ (s.re - 1) * ‖f t‖) T := by
have : AEStronglyMeasurable (fun t : ℝ => (t : ℂ) ^ (s - 1) • f t) (volume.restrict T) := by refine ((ContinuousAt.continuousOn ?_).aestronglyMeasurable hT').smul (hfc.mono_set hT) exact fun t ht => continuousAt_ofReal_cpow_const _ _ (Or.inr <| ne_of_gt (hT ht)) rw [IntegrableOn, ← integrable_norm_iff this...
import Mathlib.CategoryTheory.Filtered.Basic import Mathlib.Data.Set.Finite import Mathlib.Data.Set.Subsingleton import Mathlib.Topology.Category.TopCat.Limits.Konig import Mathlib.Tactic.AdaptationNote #align_import category_theory.cofiltered_system from "leanprover-community/mathlib"@"178a32653e369dce2da68dc6b2694e...
Mathlib/CategoryTheory/CofilteredSystem.lean
68
76
theorem nonempty_sections_of_finite_cofiltered_system.init {J : Type u} [SmallCategory J] [IsCofilteredOrEmpty J] (F : J ⥤ Type u) [hf : ∀ j, Finite (F.obj j)] [hne : ∀ j, Nonempty (F.obj j)] : F.sections.Nonempty := by
let F' : J ⥤ TopCat := F ⋙ TopCat.discrete haveI : ∀ j, DiscreteTopology (F'.obj j) := fun _ => ⟨rfl⟩ haveI : ∀ j, Finite (F'.obj j) := hf haveI : ∀ j, Nonempty (F'.obj j) := hne obtain ⟨⟨u, hu⟩⟩ := TopCat.nonempty_limitCone_of_compact_t2_cofiltered_system.{u} F' exact ⟨u, hu⟩
import Mathlib.Data.Nat.Factorial.Basic import Mathlib.Order.Monotone.Basic #align_import data.nat.choose.basic from "leanprover-community/mathlib"@"2f3994e1b117b1e1da49bcfb67334f33460c3ce4" open Nat namespace Nat def choose : ℕ → ℕ → ℕ | _, 0 => 1 | 0, _ + 1 => 0 | n + 1, k + 1 => choose n k + choose n ...
Mathlib/Data/Nat/Choose/Basic.lean
385
387
theorem multichoose_succ_succ (n k : ℕ) : multichoose (n + 1) (k + 1) = multichoose n (k + 1) + multichoose (n + 1) k := by
simp [multichoose]
import Mathlib.Analysis.Calculus.ContDiff.Bounds import Mathlib.Analysis.Calculus.IteratedDeriv.Defs import Mathlib.Analysis.Calculus.LineDeriv.Basic import Mathlib.Analysis.LocallyConvex.WithSeminorms import Mathlib.Analysis.Normed.Group.ZeroAtInfty import Mathlib.Analysis.SpecialFunctions.Pow.Real import Mathlib.Ana...
Mathlib/Analysis/Distribution/SchwartzSpace.lean
613
629
theorem _root_.Function.HasTemperateGrowth.norm_iteratedFDeriv_le_uniform_aux {f : E → F} (hf_temperate : f.HasTemperateGrowth) (n : ℕ) : ∃ (k : ℕ) (C : ℝ), 0 ≤ C ∧ ∀ N ≤ n, ∀ x : E, ‖iteratedFDeriv ℝ N f x‖ ≤ C * (1 + ‖x‖) ^ k := by
choose k C f using hf_temperate.2 use (Finset.range (n + 1)).sup k let C' := max (0 : ℝ) ((Finset.range (n + 1)).sup' (by simp) C) have hC' : 0 ≤ C' := by simp only [C', le_refl, Finset.le_sup'_iff, true_or_iff, le_max_iff] use C', hC' intro N hN x rw [← Finset.mem_range_succ_iff] at hN refine le_trans...
import Mathlib.Algebra.Group.Commute.Defs import Mathlib.Algebra.Group.Hom.Instances import Mathlib.Data.Set.Function import Mathlib.Logic.Pairwise #align_import algebra.group.pi from "leanprover-community/mathlib"@"e4bc74cbaf429d706cb9140902f7ca6c431e75a4" assert_not_exists AddMonoidWithOne assert_not_exists Mono...
Mathlib/Algebra/Group/Pi/Lemmas.lean
335
344
theorem Pi.mulSingle_commute [∀ i, MulOneClass <| f i] : Pairwise fun i j => ∀ (x : f i) (y : f j), Commute (mulSingle i x) (mulSingle j y) := by
intro i j hij x y; ext k by_cases h1 : i = k; · subst h1 simp [hij] by_cases h2 : j = k; · subst h2 simp [hij] simp [h1, h2]
import Mathlib.Algebra.Group.Pi.Lemmas import Mathlib.Algebra.Group.Support #align_import algebra.indicator_function from "leanprover-community/mathlib"@"2445c98ae4b87eabebdde552593519b9b6dc350c" assert_not_exists MonoidWithZero open Function variable {α β ι M N : Type*} namespace Set section One variable [On...
Mathlib/Algebra/Group/Indicator.lean
97
98
theorem mulIndicator_eq_self : s.mulIndicator f = f ↔ mulSupport f ⊆ s := by
simp only [funext_iff, subset_def, mem_mulSupport, mulIndicator_apply_eq_self, not_imp_comm]
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
150
154
theorem polynomialQuotientEquivQuotientPolynomial_symm_mk (I : Ideal R) (f : R[X]) : I.polynomialQuotientEquivQuotientPolynomial.symm (Quotient.mk _ f) = f.map (Quotient.mk I) := by
rw [polynomialQuotientEquivQuotientPolynomial, RingEquiv.symm_mk, RingEquiv.coe_mk, Equiv.coe_fn_mk, Quotient.lift_mk, coe_eval₂RingHom, eval₂_eq_eval_map, ← Polynomial.map_map, ← eval₂_eq_eval_map, Polynomial.eval₂_C_X]
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
284
299
theorem sdiff_sup : y \ (x ⊔ z) = y \ x ⊓ y \ z := sdiff_unique (calc y ⊓ (x ⊔ z) ⊔ y \ x ⊓ y \ z = (y ⊓ (x ⊔ z) ⊔ y \ x) ⊓ (y ⊓ (x ⊔ z) ⊔ y \ z) := by
rw [sup_inf_left] _ = (y ⊓ x ⊔ y ⊓ z ⊔ y \ x) ⊓ (y ⊓ x ⊔ y ⊓ z ⊔ y \ z) := by rw [@inf_sup_left _ _ y] _ = (y ⊓ z ⊔ (y ⊓ x ⊔ y \ x)) ⊓ (y ⊓ x ⊔ (y ⊓ z ⊔ y \ z)) := by ac_rfl _ = (y ⊓ z ⊔ y) ⊓ (y ⊓ x ⊔ y) := by rw [sup_inf_sdiff, sup_inf_sdiff] _ = (y ⊔ y ⊓ z) ⊓ (y ⊔ y ⊓ x) := by ac_rf...
import Mathlib.LinearAlgebra.Dimension.StrongRankCondition import Mathlib.LinearAlgebra.FreeModule.Basic #align_import linear_algebra.free_module.pid from "leanprover-community/mathlib"@"d87199d51218d36a0a42c66c82d147b5a7ff87b3" universe u v section Ring variable {R : Type u} {M : Type v} [Ring R] [AddCommGroup...
Mathlib/LinearAlgebra/FreeModule/PID.lean
72
81
theorem eq_bot_of_generator_maximal_submoduleImage_eq_zero {N O : Submodule R M} (b : Basis ι R O) (hNO : N ≤ O) {ϕ : O →ₗ[R] R} (hϕ : ∀ ψ : O →ₗ[R] R, ¬ϕ.submoduleImage N < ψ.submoduleImage N) [(ϕ.submoduleImage N).IsPrincipal] (hgen : generator (ϕ.submoduleImage N) = 0) : N = ⊥ := by
rw [Submodule.eq_bot_iff] intro x hx refine (mk_eq_zero _ _).mp (show (⟨x, hNO hx⟩ : O) = 0 from b.ext_elem fun i ↦ ?_) rw [(eq_bot_iff_generator_eq_zero _).mpr hgen] at hϕ rw [LinearEquiv.map_zero, Finsupp.zero_apply] refine (Submodule.eq_bot_iff _).mp (not_bot_lt_iff.1 <| hϕ (Finsupp.lapply i ∘ₗ ↑b.repr)...
import Mathlib.Algebra.BigOperators.GroupWithZero.Finset import Mathlib.Data.Finite.Card import Mathlib.GroupTheory.Finiteness import Mathlib.GroupTheory.GroupAction.Quotient #align_import group_theory.index from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" namespace Subgroup open Ca...
Mathlib/GroupTheory/Index.lean
134
135
theorem inf_relindex_right : (H ⊓ K).relindex K = H.relindex K := by
rw [relindex, relindex, inf_subgroupOf_right]
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
163
165
theorem real_smul_negPart_neg (r : ℝ) (hr : r < 0) : (r • j).negPart = (-r).toNNReal • j.posPart := by
rw [real_smul_def, ← smul_posPart, if_neg (not_le.2 hr), neg_negPart]
import Mathlib.GroupTheory.OrderOfElement import Mathlib.Data.Finset.NoncommProd import Mathlib.Data.Fintype.BigOperators import Mathlib.Data.Nat.GCD.BigOperators import Mathlib.Order.SupIndep #align_import group_theory.noncomm_pi_coprod from "leanprover-community/mathlib"@"6f9f36364eae3f42368b04858fd66d6d9ae730d8" ...
Mathlib/GroupTheory/NoncommPiCoprod.lean
159
170
theorem noncommPiCoprod_mrange : MonoidHom.mrange (noncommPiCoprod ϕ hcomm) = ⨆ i : ι, MonoidHom.mrange (ϕ i) := by
letI := Classical.decEq ι apply le_antisymm · rintro x ⟨f, rfl⟩ refine Submonoid.noncommProd_mem _ _ _ (fun _ _ _ _ h => hcomm h _ _) (fun i _ => ?_) apply Submonoid.mem_sSup_of_mem · use i simp · refine iSup_le ?_ rintro i x ⟨y, rfl⟩ exact ⟨Pi.mulSingle i y, noncommPiCoprod_mulSingle _...
import Mathlib.AlgebraicGeometry.Gluing import Mathlib.CategoryTheory.Limits.Opposites import Mathlib.AlgebraicGeometry.AffineScheme import Mathlib.CategoryTheory.Limits.Shapes.Diagonal #align_import algebraic_geometry.pullbacks from "leanprover-community/mathlib"@"7316286ff2942aa14e540add9058c6b0aa1c8070" set_opt...
Mathlib/AlgebraicGeometry/Pullbacks.lean
272
277
theorem gluedLiftPullbackMap_fst (i j : 𝒰.J) : gluedLiftPullbackMap 𝒰 f g s i j ≫ pullback.fst = pullback.fst ≫ (pullbackSymmetry _ _).hom ≫ pullback.map _ _ _ _ (𝟙 _) s.snd f (Category.id_comp _).symm s.condition := by
simp [gluedLiftPullbackMap]
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
1,026
1,029
theorem Filter.EventuallyEq.congr_continuousWithinAt {f g : α → β} {s : Set α} {x : α} (h : f =ᶠ[𝓝[s] x] g) (hx : f x = g x) : ContinuousWithinAt f s x ↔ ContinuousWithinAt g s x := by
rw [ContinuousWithinAt, hx, tendsto_congr' h, ContinuousWithinAt]
import Mathlib.Algebra.Jordan.Basic import Mathlib.Algebra.Module.Defs #align_import algebra.symmetrized from "leanprover-community/mathlib"@"933547832736be61a5de6576e22db351c6c2fbfd" open Function def SymAlg (α : Type*) : Type _ := α #align sym_alg SymAlg postfix:max "ˢʸᵐ" => SymAlg namespace SymAlg varia...
Mathlib/Algebra/Symmetrized.lean
325
326
theorem unsym_mul_self [Semiring α] [Invertible (2 : α)] (a : αˢʸᵐ) : unsym (a * a) = unsym a * unsym a := by
rw [mul_def, unsym_sym, ← two_mul, invOf_mul_self_assoc]
import Mathlib.Algebra.Group.Pi.Lemmas import Mathlib.Algebra.Group.Support #align_import algebra.indicator_function from "leanprover-community/mathlib"@"2445c98ae4b87eabebdde552593519b9b6dc350c" assert_not_exists MonoidWithZero open Function variable {α β ι M N : Type*} namespace Set section One variable [On...
Mathlib/Algebra/Group/Indicator.lean
286
290
theorem mulIndicator_one_preimage (s : Set M) : t.mulIndicator 1 ⁻¹' s ∈ ({Set.univ, ∅} : Set (Set α)) := by
classical rw [mulIndicator_one', preimage_one] split_ifs <;> simp
import Mathlib.Data.List.Range import Mathlib.Data.List.Perm #align_import data.list.sigma from "leanprover-community/mathlib"@"f808feb6c18afddb25e66a71d317643cf7fb5fbb" universe u v namespace List variable {α : Type u} {β : α → Type v} {l l₁ l₂ : List (Sigma β)} def keys : List (Sigma β) → List α := map ...
Mathlib/Data/List/Sigma.lean
311
315
theorem lookupAll_length_le_one (a : α) {l : List (Sigma β)} (h : l.NodupKeys) : length (lookupAll a l) ≤ 1 := by
have := Nodup.sublist ((lookupAll_sublist a l).map _) h rw [map_map] at this rwa [← nodup_replicate, ← map_const]
import Mathlib.Data.List.Forall2 #align_import data.list.zip from "leanprover-community/mathlib"@"134625f523e737f650a6ea7f0c82a6177e45e622" -- Make sure we don't import algebra assert_not_exists Monoid universe u open Nat namespace List variable {α : Type u} {β γ δ ε : Type*} #align list.zip_with_cons_cons Li...
Mathlib/Data/List/Zip.lean
272
278
theorem get?_zip_with_eq_some (f : α → β → γ) (l₁ : List α) (l₂ : List β) (z : γ) (i : ℕ) : (zipWith f l₁ l₂).get? i = some z ↔ ∃ x y, l₁.get? i = some x ∧ l₂.get? i = some y ∧ f x y = z := by
induction l₁ generalizing l₂ i · simp [zipWith] · cases l₂ <;> simp only [zipWith, get?, exists_false, and_false_iff, false_and_iff] cases i <;> simp [*]
import Mathlib.Algebra.CharP.ExpChar import Mathlib.GroupTheory.OrderOfElement #align_import algebra.char_p.two from "leanprover-community/mathlib"@"7f1ba1a333d66eed531ecb4092493cd1b6715450" variable {R ι : Type*} namespace CharTwo section CommSemiring variable [CommSemiring R] [CharP R 2] theorem add_sq (x y...
Mathlib/Algebra/CharP/Two.lean
115
116
theorem sum_mul_self (s : Finset ι) (f : ι → R) : ((∑ i ∈ s, f i) * ∑ i ∈ s, f i) = ∑ i ∈ s, f i * f i := by
simp_rw [← pow_two, sum_sq]
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Angle import Mathlib.Analysis.SpecialFunctions.Trigonometric.Inverse #align_import analysis.special_functions.complex.arg from "leanprover-community/mathlib"@"2c1d8ca2812b64f88992a5294ea3dba144755cd1" open Filter Metric Set open scoped ComplexConjugate Real To...
Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean
443
445
theorem arg_neg_eq_arg_sub_pi_of_im_pos {x : ℂ} (hi : 0 < x.im) : arg (-x) = arg x - π := by
rw [arg_of_im_pos hi, arg_of_im_neg (show (-x).im < 0 from Left.neg_neg_iff.2 hi)] simp [neg_div, Real.arccos_neg]
import Mathlib.LinearAlgebra.FreeModule.PID import Mathlib.MeasureTheory.Group.FundamentalDomain import Mathlib.MeasureTheory.Measure.Lebesgue.EqHaar import Mathlib.RingTheory.Localization.Module #align_import algebra.module.zlattice from "leanprover-community/mathlib"@"a3e83f0fa4391c8740f7d773a7a9b74e311ae2a3" n...
Mathlib/Algebra/Module/Zlattice/Basic.lean
74
79
theorem fundamentalDomain_reindex {ι' : Type*} (e : ι ≃ ι') : fundamentalDomain (b.reindex e) = fundamentalDomain b := by
ext simp_rw [mem_fundamentalDomain, Basis.repr_reindex_apply] rw [Equiv.forall_congr' e] simp_rw [implies_true]
import Mathlib.Algebra.BigOperators.Group.Finset import Mathlib.Data.Fintype.Card #align_import data.multiset.fintype from "leanprover-community/mathlib"@"e3d9ab8faa9dea8f78155c6c27d62a621f4c152d" variable {α : Type*} [DecidableEq α] {m : Multiset α} def Multiset.ToType (m : Multiset α) : Type _ := (x : α) × Fi...
Mathlib/Data/Multiset/Fintype.lean
242
244
theorem Multiset.card_coe (m : Multiset α) : Fintype.card m = Multiset.card m := by
rw [Fintype.card_congr m.coeEquiv] simp only [Fintype.card_coe, card_toEnumFinset]
import Mathlib.Topology.CompactOpen noncomputable section open scoped Topology open Filter variable {X ι : Type*} {Y : ι → Type*} [TopologicalSpace X] [∀ i, TopologicalSpace (Y i)] namespace ContinuousMap
Mathlib/Topology/ContinuousFunction/Sigma.lean
44
54
theorem embedding_sigmaMk_comp [Nonempty X] : Embedding (fun g : Σ i, C(X, Y i) ↦ (sigmaMk g.1).comp g.2) where toInducing := inducing_sigma.2 ⟨fun i ↦ (sigmaMk i).inducing_comp embedding_sigmaMk.toInducing, fun i ↦ let ⟨x⟩ := ‹Nonempty X› ⟨_, (isOpen_sigma_fst_preimage {i}).preimage (continuous_e...
· rintro ⟨i, g⟩ ⟨i', g'⟩ h obtain ⟨rfl, hg⟩ : i = i' ∧ HEq (⇑g) (⇑g') := Function.eq_of_sigmaMk_comp <| congr_arg DFunLike.coe h simpa using hg
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.Reverse import Mathlib.Algebra.Polynomial.Inductions import Mathlib.RingTheory.Localization.Basic #align_import data.polynomial.laurent from "leanprover-community/mathlib"@"831c494092374cfe9f50591ed0ac81a25efc5b86" open Polynomial Func...
Mathlib/Algebra/Polynomial/Laurent.lean
209
212
theorem single_eq_C_mul_T (r : R) (n : ℤ) : (Finsupp.single n r : R[T;T⁻¹]) = (C r * T n : R[T;T⁻¹]) := by
-- Porting note: was `convert single_mul_single.symm` simp [C, T, single_mul_single]
import Batteries.Control.ForInStep.Lemmas import Batteries.Data.List.Basic import Batteries.Tactic.Init import Batteries.Tactic.Alias namespace List open Nat @[simp] theorem mem_toArray {a : α} {l : List α} : a ∈ l.toArray ↔ a ∈ l := by simp [Array.mem_def] @[simp] theorem drop_one : ∀ l : List α, drop 1 l =...
.lake/packages/batteries/Batteries/Data/List/Lemmas.lean
1,462
1,469
theorem findIdxs_cons : (x :: xs : List α).findIdxs p = bif p x then 0 :: (xs.findIdxs p).map (· + 1) else (xs.findIdxs p).map (· + 1) := by
dsimp [findIdxs] rw [cond_eq_if] split <;> · simp only [Nat.zero_add, foldrIdx_start, Nat.add_zero, cons.injEq, true_and] apply findIdxs_cons_aux
import Mathlib.Algebra.Ring.Defs import Mathlib.Algebra.Group.Ext local macro:max "local_hAdd[" type:term ", " inst:term "]" : term => `(term| (letI := $inst; HAdd.hAdd : $type → $type → $type)) local macro:max "local_hMul[" type:term ", " inst:term "]" : term => `(term| (letI := $inst; HMul.hMul : $type → $typ...
Mathlib/Algebra/Ring/Ext.lean
473
475
theorem toNonUnitalRing_injective : Function.Injective (@toNonUnitalRing R) := by
rintro ⟨⟩ ⟨⟩ _; congr
import Mathlib.Algebra.CharP.Invertible import Mathlib.Algebra.Order.Interval.Set.Group import Mathlib.Analysis.Convex.Segment import Mathlib.LinearAlgebra.AffineSpace.FiniteDimensional import Mathlib.Tactic.FieldSimp #align_import analysis.convex.between from "leanprover-community/mathlib"@"571e13cacbed7bf042fd3058c...
Mathlib/Analysis/Convex/Between.lean
45
46
theorem affineSegment_eq_segment (x y : V) : affineSegment R x y = segment R x y := by
rw [segment_eq_image_lineMap, affineSegment]
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Basic import Mathlib.Topology.Order.ProjIcc #align_import analysis.special_functions.trigonometric.inverse from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section open scoped Classical open Topology Filter open S...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Inverse.lean
346
346
theorem arcsin_eq_pi_div_two_sub_arccos (x : ℝ) : arcsin x = π / 2 - arccos x := by
simp [arccos]
import Mathlib.Data.Set.Image import Mathlib.Order.SuccPred.Relation import Mathlib.Topology.Clopen import Mathlib.Topology.Irreducible #align_import topology.connected from "leanprover-community/mathlib"@"d101e93197bb5f6ea89bd7ba386b7f7dff1f3903" open Set Function Topology TopologicalSpace Relation open scoped C...
Mathlib/Topology/Connected/Basic.lean
783
786
theorem Function.Surjective.connectedSpace [ConnectedSpace α] [TopologicalSpace β] {f : α → β} (hf : Surjective f) (hf' : Continuous f) : ConnectedSpace β := by
rw [connectedSpace_iff_univ, ← hf.range_eq] exact isConnected_range hf'
import Mathlib.Algebra.Group.Equiv.TypeTags import Mathlib.Algebra.Module.Defs import Mathlib.Algebra.Module.LinearMap.Basic import Mathlib.Algebra.MonoidAlgebra.Basic import Mathlib.LinearAlgebra.Dual import Mathlib.LinearAlgebra.Contraction import Mathlib.RingTheory.TensorProduct.Basic #align_import representation_...
Mathlib/RepresentationTheory/Basic.lean
248
252
theorem smul_ofModule_asModule (r : MonoidAlgebra k G) (m : (ofModule M).asModule) : (RestrictScalars.addEquiv k _ _) ((ofModule M).asModuleEquiv (r • m)) = r • (RestrictScalars.addEquiv k _ _) ((ofModule M).asModuleEquiv (G := G) m) := by
dsimp simp only [AddEquiv.apply_symm_apply, ofModule_asAlgebraHom_apply_apply]
import Mathlib.Data.Bundle import Mathlib.Data.Set.Image import Mathlib.Topology.PartialHomeomorph import Mathlib.Topology.Order.Basic #align_import topology.fiber_bundle.trivialization from "leanprover-community/mathlib"@"e473c3198bb41f68560cab68a0529c854b618833" open TopologicalSpace Filter Set Bundle Function ...
Mathlib/Topology/FiberBundle/Trivialization.lean
118
118
theorem mem_source : x ∈ e.source ↔ proj x ∈ e.baseSet := by
rw [e.source_eq, mem_preimage]
import Mathlib.Analysis.SpecialFunctions.ExpDeriv #align_import analysis.ODE.gronwall from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" variable {E : Type*} [NormedAddCommGroup E] [NormedSpace ℝ E] {F : Type*} [NormedAddCommGroup F] [NormedSpace ℝ F] open Metric Set Asymptotics Fil...
Mathlib/Analysis/ODE/Gronwall.lean
156
176
theorem dist_le_of_approx_trajectories_ODE_of_mem (hf : ContinuousOn f (Icc a b)) (hf' : ∀ t ∈ Ico a b, HasDerivWithinAt f (f' t) (Ici t) t) (f_bound : ∀ t ∈ Ico a b, dist (f' t) (v t (f t)) ≤ εf) (hfs : ∀ t ∈ Ico a b, f t ∈ s t) (hg : ContinuousOn g (Icc a b)) (hg' : ∀ t ∈ Ico a b, HasDerivWith...
simp only [dist_eq_norm] at ha ⊢ have h_deriv : ∀ t ∈ Ico a b, HasDerivWithinAt (fun t => f t - g t) (f' t - g' t) (Ici t) t := fun t ht => (hf' t ht).sub (hg' t ht) apply norm_le_gronwallBound_of_norm_deriv_right_le (hf.sub hg) h_deriv ha intro t ht have := dist_triangle4_right (f' t) (g' t) (v t (f t))...
import Mathlib.Algebra.Order.Ring.Rat import Mathlib.Tactic.NormNum.Inv import Mathlib.Tactic.NormNum.Pow import Mathlib.Util.AtomM set_option autoImplicit true namespace Mathlib.Tactic namespace Ring open Mathlib.Meta Qq NormNum Lean.Meta AtomM open Lean (MetaM Expr mkRawNatLit) def instCommSemiringNat : CommSe...
Mathlib/Tactic/Ring/Basic.lean
668
670
theorem pow_bit1 (_ : (a : R) ^ k = b) (_ : b * b = c) (_ : c * a = d) : a ^ (Nat.add (Nat.mul (nat_lit 2) k) (nat_lit 1)) = d := by
subst_vars; simp [Nat.succ_mul, pow_add]
import Mathlib.Data.ENNReal.Basic import Mathlib.Topology.ContinuousFunction.Bounded import Mathlib.Topology.MetricSpace.Thickening #align_import topology.metric_space.thickened_indicator from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" open scoped Classical open NNReal ENNReal Topol...
Mathlib/Topology/MetricSpace/ThickenedIndicator.lean
89
91
theorem thickenedIndicatorAux_one_of_mem_closure (δ : ℝ) (E : Set α) {x : α} (x_mem : x ∈ closure E) : thickenedIndicatorAux δ E x = 1 := by
rw [← thickenedIndicatorAux_closure_eq, thickenedIndicatorAux_one δ (closure E) x_mem]
import Mathlib.Algebra.Divisibility.Basic import Mathlib.Algebra.Group.Prod import Mathlib.Tactic.Common variable {ι G₁ G₂ : Type*} {G : ι → Type*} [Semigroup G₁] [Semigroup G₂] [∀ i, Semigroup (G i)]
Mathlib/Algebra/Divisibility/Prod.lean
16
20
theorem prod_dvd_iff {x y : G₁ × G₂} : x ∣ y ↔ x.1 ∣ y.1 ∧ x.2 ∣ y.2 := by
cases x; cases y simp only [dvd_def, Prod.exists, Prod.mk_mul_mk, Prod.mk.injEq, exists_and_left, exists_and_right, and_self, true_and]
import Mathlib.CategoryTheory.Limits.Shapes.Pullbacks import Mathlib.CategoryTheory.Limits.Shapes.BinaryProducts import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Pullbacks #align_import category_theory.limits.constructions.epi_mono from "leanprover-community/mathlib"@"f7baecbb54bd0f24f228576f97b1752fc3c9b318" ...
Mathlib/CategoryTheory/Limits/Constructions/EpiMono.lean
32
36
theorem preserves_mono_of_preservesLimit {X Y : C} (f : X ⟶ Y) [PreservesLimit (cospan f f) F] [Mono f] : Mono (F.map f) := by
have := isLimitPullbackConeMapOfIsLimit F _ (PullbackCone.isLimitMkIdId f) simp_rw [F.map_id] at this apply PullbackCone.mono_of_isLimitMkIdId _ this
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
527
532
theorem setIntegral_prod_mul {L : Type*} [RCLike L] (f : α → L) (g : β → L) (s : Set α) (t : Set β) : ∫ z in s ×ˢ t, f z.1 * g z.2 ∂μ.prod ν = (∫ x in s, f x ∂μ) * ∫ y in t, g y ∂ν := by
-- Porting note: added rw [← Measure.prod_restrict s t] apply integral_prod_mul
import Mathlib.Analysis.Convex.Normed import Mathlib.Analysis.Convex.Strict import Mathlib.Analysis.Normed.Order.Basic import Mathlib.Analysis.NormedSpace.AddTorsor import Mathlib.Analysis.NormedSpace.Pointwise import Mathlib.Analysis.NormedSpace.Ray #align_import analysis.convex.strict_convex_space from "leanprover-...
Mathlib/Analysis/Convex/StrictConvexSpace.lean
152
158
theorem combo_mem_ball_of_ne (hx : x ∈ closedBall z r) (hy : y ∈ closedBall z r) (hne : x ≠ y) (ha : 0 < a) (hb : 0 < b) (hab : a + b = 1) : a • x + b • y ∈ ball z r := by
rcases eq_or_ne r 0 with (rfl | hr) · rw [closedBall_zero, mem_singleton_iff] at hx hy exact (hne (hx.trans hy.symm)).elim · simp only [← interior_closedBall _ hr] at hx hy ⊢ exact strictConvex_closedBall ℝ z r hx hy hne ha hb hab
import Mathlib.SetTheory.Cardinal.ToNat import Mathlib.Data.Nat.PartENat #align_import set_theory.cardinal.basic from "leanprover-community/mathlib"@"3ff3f2d6a3118b8711063de7111a0d77a53219a8" universe u v open Function variable {α : Type u} namespace Cardinal noncomputable def toPartENat : Cardinal →+o PartEN...
Mathlib/SetTheory/Cardinal/PartENat.lean
112
113
theorem mk_toPartENat_eq_coe_card [Fintype α] : toPartENat #α = Fintype.card α := by
simp
import Mathlib.Probability.Kernel.MeasurableIntegral #align_import probability.kernel.composition from "leanprover-community/mathlib"@"3b92d54a05ee592aa2c6181a4e76b1bb7cc45d0b" open MeasureTheory open scoped ENNReal namespace ProbabilityTheory namespace kernel variable {α β ι : Type*} {mα : MeasurableSpace α}...
Mathlib/Probability/Kernel/Composition.lean
151
154
theorem compProdFun_eq_tsum (κ : kernel α β) [IsSFiniteKernel κ] (η : kernel (α × β) γ) [IsSFiniteKernel η] (a : α) (hs : MeasurableSet s) : compProdFun κ η a s = ∑' (n) (m), compProdFun (seq κ n) (seq η m) a s := by
simp_rw [compProdFun_tsum_left κ η a s, compProdFun_tsum_right _ η a hs]
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
187
190
theorem mem_rootsOfUnity_iff_mem_nthRoots {ζ : Rˣ} : ζ ∈ rootsOfUnity k R ↔ (ζ : R) ∈ nthRoots k (1 : R) := by
simp only [mem_rootsOfUnity, mem_nthRoots k.pos, Units.ext_iff, Units.val_one, Units.val_pow_eq_pow_val]
import Mathlib.RingTheory.Localization.FractionRing import Mathlib.Algebra.Polynomial.RingDivision #align_import field_theory.ratfunc from "leanprover-community/mathlib"@"bf9bbbcf0c1c1ead18280b0d010e417b10abb1b6" noncomputable section open scoped Classical open scoped nonZeroDivisors Polynomial universe u v va...
Mathlib/FieldTheory/RatFunc/Defs.lean
195
199
theorem mk_eq_mk {p q p' q' : K[X]} (hq : q ≠ 0) (hq' : q' ≠ 0) : RatFunc.mk p q = RatFunc.mk p' q' ↔ p * q' = p' * q := by
rw [mk_def_of_ne _ hq, mk_def_of_ne _ hq', ofFractionRing_injective.eq_iff, IsLocalization.mk'_eq_iff_eq', -- Porting note: removed `[anonymous], [anonymous]` (IsFractionRing.injective K[X] (FractionRing K[X])).eq_iff]
import Mathlib.Analysis.SpecialFunctions.ExpDeriv #align_import analysis.ODE.gronwall from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" variable {E : Type*} [NormedAddCommGroup E] [NormedSpace ℝ E] {F : Type*} [NormedAddCommGroup F] [NormedSpace ℝ F] open Metric Set Asymptotics Fil...
Mathlib/Analysis/ODE/Gronwall.lean
73
76
theorem hasDerivAt_gronwallBound_shift (δ K ε x a : ℝ) : HasDerivAt (fun y => gronwallBound δ K ε (y - a)) (K * gronwallBound δ K ε (x - a) + ε) x := by
convert (hasDerivAt_gronwallBound δ K ε _).comp x ((hasDerivAt_id x).sub_const a) using 1 rw [id, mul_one]
import Mathlib.Data.Fintype.Option import Mathlib.Data.Fintype.Prod import Mathlib.Data.Fintype.Pi import Mathlib.Data.Vector.Basic import Mathlib.Data.PFun import Mathlib.Logic.Function.Iterate import Mathlib.Order.Basic import Mathlib.Tactic.ApplyFun #align_import computability.turing_machine from "leanprover-commu...
Mathlib/Computability/TuringMachine.lean
630
632
theorem Tape.mk'_nth_nat {Γ} [Inhabited Γ] (L R : ListBlank Γ) (n : ℕ) : (Tape.mk' L R).nth n = R.nth n := by
rw [← Tape.right₀_nth, Tape.mk'_right₀]
import Mathlib.Topology.UniformSpace.UniformConvergenceTopology #align_import topology.uniform_space.equicontinuity from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" section open UniformSpace Filter Set Uniformity Topology UniformConvergence Function variable {ι κ X X' Y Z α α' β β'...
Mathlib/Topology/UniformSpace/Equicontinuity.lean
741
745
theorem UniformInducing.equicontinuousAt_iff {F : ι → X → α} {x₀ : X} {u : α → β} (hu : UniformInducing u) : EquicontinuousAt F x₀ ↔ EquicontinuousAt ((u ∘ ·) ∘ F) x₀ := by
have := (UniformFun.postcomp_uniformInducing (α := ι) hu).inducing rw [equicontinuousAt_iff_continuousAt, equicontinuousAt_iff_continuousAt, this.continuousAt_iff] rfl
import Mathlib.LinearAlgebra.AffineSpace.AffineMap import Mathlib.Tactic.FieldSimp #align_import linear_algebra.affine_space.slope from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" open AffineMap variable {k E PE : Type*} [Field k] [AddCommGroup E] [Module k E] [AddTorsor E PE] def ...
Mathlib/LinearAlgebra/AffineSpace/Slope.lean
47
48
theorem slope_same (f : k → PE) (a : k) : (slope f a a : E) = 0 := by
rw [slope, sub_self, inv_zero, zero_smul]
import Mathlib.Algebra.MonoidAlgebra.Degree import Mathlib.Algebra.Polynomial.Coeff import Mathlib.Algebra.Polynomial.Monomial import Mathlib.Data.Fintype.BigOperators import Mathlib.Data.Nat.WithBot import Mathlib.Data.Nat.Cast.WithTop import Mathlib.Data.Nat.SuccPred #align_import data.polynomial.degree.definitions...
Mathlib/Algebra/Polynomial/Degree/Definitions.lean
537
538
theorem coeff_mul_X_sub_C {p : R[X]} {r : R} {a : ℕ} : coeff (p * (X - C r)) (a + 1) = coeff p a - coeff p (a + 1) * r := by
simp [mul_sub]
import Mathlib.Order.Interval.Set.OrdConnectedComponent import Mathlib.Topology.Order.Basic #align_import topology.algebra.order.t5 from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" open Filter Set Function OrderDual Topology Interval variable {X : Type*} [LinearOrder X] [Topological...
Mathlib/Topology/Order/T5.lean
66
71
theorem compl_section_ordSeparatingSet_mem_nhdsWithin_Iic (hd : Disjoint s (closure t)) (ha : a ∈ s) : (ordConnectedSection <| ordSeparatingSet s t)ᶜ ∈ 𝓝[≤] a := by
have hd' : Disjoint (ofDual ⁻¹' s) (closure <| ofDual ⁻¹' t) := hd have ha' : toDual a ∈ ofDual ⁻¹' s := ha simpa only [dual_ordSeparatingSet, dual_ordConnectedSection] using compl_section_ordSeparatingSet_mem_nhdsWithin_Ici hd' ha'