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import Mathlib.Data.Nat.Defs import Mathlib.Order.Interval.Set.Basic import Mathlib.Tactic.Monotonicity.Attr #align_import data.nat.log from "leanprover-community/mathlib"@"3e00d81bdcbf77c8188bbd18f5524ddc3ed8cac6" namespace Nat --@[pp_nodot] porting note: unknown attribute def log (b : ℕ) : ℕ → ℕ | n => i...
Mathlib/Data/Nat/Log.lean
335
339
theorem clog_anti_left {b c n : ℕ} (hc : 1 < c) (hb : c ≤ b) : clog b n ≤ clog c n := by
rw [← le_pow_iff_clog_le (lt_of_lt_of_le hc hb)] calc n ≤ c ^ clog c n := le_pow_clog hc _ _ ≤ b ^ clog c n := Nat.pow_le_pow_left hb _
import Mathlib.Order.ConditionallyCompleteLattice.Finset import Mathlib.Order.Interval.Finset.Nat #align_import data.nat.lattice from "leanprover-community/mathlib"@"52fa514ec337dd970d71d8de8d0fd68b455a1e54" assert_not_exists MonoidWithZero open Set namespace Nat open scoped Classical noncomputable instance : ...
Mathlib/Data/Nat/Lattice.lean
110
120
theorem sInf_upward_closed_eq_succ_iff {s : Set ℕ} (hs : ∀ k₁ k₂ : ℕ, k₁ ≤ k₂ → k₁ ∈ s → k₂ ∈ s) (k : ℕ) : sInf s = k + 1 ↔ k + 1 ∈ s ∧ k ∉ s := by
constructor · intro H rw [eq_Ici_of_nonempty_of_upward_closed (nonempty_of_sInf_eq_succ _) hs, H, mem_Ici, mem_Ici] · exact ⟨le_rfl, k.not_succ_le_self⟩; · exact k · assumption · rintro ⟨H, H'⟩ rw [sInf_def (⟨_, H⟩ : s.Nonempty), find_eq_iff] exact ⟨H, fun n hnk hns ↦ H' <| hs n k (Nat.lt...
import Mathlib.Algebra.Order.BigOperators.Ring.Finset import Mathlib.Data.NNRat.Defs variable {ι α : Type*} namespace NNRat @[norm_cast] theorem coe_list_sum (l : List ℚ≥0) : (l.sum : ℚ) = (l.map (↑)).sum := map_list_sum coeHom _ #align nnrat.coe_list_sum NNRat.coe_list_sum @[norm_cast] theorem coe_list_prod (...
Mathlib/Data/NNRat/BigOperators.lean
52
55
theorem toNNRat_prod_of_nonneg {s : Finset α} {f : α → ℚ} (hf : ∀ a ∈ s, 0 ≤ f a) : (∏ a ∈ s, f a).toNNRat = ∏ a ∈ s, (f a).toNNRat := by
rw [← coe_inj, coe_prod, Rat.coe_toNNRat _ (Finset.prod_nonneg hf)] exact Finset.prod_congr rfl fun x hxs ↦ by rw [Rat.coe_toNNRat _ (hf x hxs)]
import Mathlib.Data.ENNReal.Real import Mathlib.Order.Interval.Finset.Nat import Mathlib.Topology.UniformSpace.Pi import Mathlib.Topology.UniformSpace.UniformConvergence import Mathlib.Topology.UniformSpace.UniformEmbedding #align_import topology.metric_space.emetric_space from "leanprover-community/mathlib"@"c8f3055...
Mathlib/Topology/EMetricSpace/Basic.lean
560
560
theorem mem_closedBall' : y ∈ closedBall x ε ↔ edist x y ≤ ε := by
rw [edist_comm, mem_closedBall]
import Mathlib.MeasureTheory.Measure.ProbabilityMeasure import Mathlib.MeasureTheory.Measure.Lebesgue.Basic import Mathlib.MeasureTheory.Integral.Layercake import Mathlib.MeasureTheory.Integral.BoundedContinuousFunction #align_import measure_theory.measure.portmanteau from "leanprover-community/mathlib"@"fd5edc43dc4f...
Mathlib/MeasureTheory/Measure/Portmanteau.lean
399
410
theorem exists_null_frontier_thickening (μ : Measure Ω) [SigmaFinite μ] (s : Set Ω) {a b : ℝ} (hab : a < b) : ∃ r ∈ Ioo a b, μ (frontier (Metric.thickening r s)) = 0 := by
have mbles : ∀ r : ℝ, MeasurableSet (frontier (Metric.thickening r s)) := fun r => isClosed_frontier.measurableSet have disjs := Metric.frontier_thickening_disjoint s have key := Measure.countable_meas_pos_of_disjoint_iUnion (μ := μ) mbles disjs have aux := measure_diff_null (s := Ioo a b) (Set.Countable.m...
import Mathlib.Topology.MetricSpace.HausdorffDistance #align_import topology.metric_space.hausdorff_distance from "leanprover-community/mathlib"@"bc91ed7093bf098d253401e69df601fc33dde156" noncomputable section open NNReal ENNReal Topology Set Filter Bornology universe u v w variable {ι : Sort*} {α : Type u} {β :...
Mathlib/Topology/MetricSpace/Thickening.lean
238
239
theorem cthickening_empty (δ : ℝ) : cthickening δ (∅ : Set α) = ∅ := by
simp only [cthickening, ENNReal.ofReal_ne_top, setOf_false, infEdist_empty, top_le_iff]
import Mathlib.Analysis.InnerProductSpace.PiL2 import Mathlib.Combinatorics.Additive.AP.Three.Defs import Mathlib.Combinatorics.Pigeonhole import Mathlib.Data.Complex.ExponentialBounds #align_import combinatorics.additive.behrend from "leanprover-community/mathlib"@"4fa54b337f7d52805480306db1b1439c741848c8" open N...
Mathlib/Combinatorics/Additive/AP/Three/Behrend.lean
118
118
theorem sphere_zero_right (n k : ℕ) : sphere (n + 1) 0 k = ∅ := by
simp [sphere]
import Mathlib.Probability.Variance #align_import probability.moments from "leanprover-community/mathlib"@"85453a2a14be8da64caf15ca50930cf4c6e5d8de" open MeasureTheory Filter Finset Real noncomputable section open scoped MeasureTheory ProbabilityTheory ENNReal NNReal namespace ProbabilityTheory variable {Ω ι ...
Mathlib/Probability/Moments.lean
232
239
theorem IndepFun.mgf_add' {X Y : Ω → ℝ} (h_indep : IndepFun X Y μ) (hX : AEStronglyMeasurable X μ) (hY : AEStronglyMeasurable Y μ) : mgf (X + Y) μ t = mgf X μ t * mgf Y μ t := by
have A : Continuous fun x : ℝ => exp (t * x) := by fun_prop have h'X : AEStronglyMeasurable (fun ω => exp (t * X ω)) μ := A.aestronglyMeasurable.comp_aemeasurable hX.aemeasurable have h'Y : AEStronglyMeasurable (fun ω => exp (t * Y ω)) μ := A.aestronglyMeasurable.comp_aemeasurable hY.aemeasurable exact...
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
316
318
theorem dual_node3L (l : Ordnode α) (x : α) (m : Ordnode α) (y : α) (r : Ordnode α) : dual (node3L l x m y r) = node3R (dual r) y (dual m) x (dual l) := by
simp [node3L, node3R, dual_node', add_comm]
import Mathlib.Data.Set.Function import Mathlib.Analysis.BoundedVariation #align_import analysis.constant_speed from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" open scoped NNReal ENNReal open Set MeasureTheory Classical variable {α : Type*} [LinearOrder α] {E : Type*} [PseudoEMetr...
Mathlib/Analysis/ConstantSpeed.lean
222
235
theorem unique_unit_speed_on_Icc_zero {s t : ℝ} (hs : 0 ≤ s) (ht : 0 ≤ t) {φ : ℝ → ℝ} (φm : MonotoneOn φ <| Icc 0 s) (φst : φ '' Icc 0 s = Icc 0 t) (hfφ : HasUnitSpeedOn (f ∘ φ) (Icc 0 s)) (hf : HasUnitSpeedOn f (Icc 0 t)) : EqOn φ id (Icc 0 s) := by
rw [← φst] at hf convert unique_unit_speed φm hfφ hf ⟨le_rfl, hs⟩ using 1 have : φ 0 = 0 := by have hm : 0 ∈ φ '' Icc 0 s := by simp only [φst, ht, mem_Icc, le_refl, and_self] obtain ⟨x, xs, hx⟩ := hm apply le_antisymm ((φm ⟨le_rfl, hs⟩ xs xs.1).trans_eq hx) _ have := φst ▸ mapsTo_image φ (Icc 0 ...
import Mathlib.Algebra.Group.Pi.Lemmas import Mathlib.Topology.Algebra.Monoid import Mathlib.Topology.Homeomorph #align_import topology.algebra.group_with_zero from "leanprover-community/mathlib"@"c10e724be91096453ee3db13862b9fb9a992fef2" open Topology Filter Function variable {α β G₀ : Type*} section DivConst...
Mathlib/Topology/Algebra/GroupWithZero.lean
69
71
theorem ContinuousOn.div_const (hf : ContinuousOn f s) (y : G₀) : ContinuousOn (fun x => f x / y) s := by
simpa only [div_eq_mul_inv] using hf.mul continuousOn_const
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
1,437
1,447
theorem _root_.MeasurableEmbedding.lintegral_map [MeasurableSpace β] {g : α → β} (hg : MeasurableEmbedding g) (f : β → ℝ≥0∞) : ∫⁻ a, f a ∂map g μ = ∫⁻ a, f (g a) ∂μ := by
rw [lintegral, lintegral] refine le_antisymm (iSup₂_le fun f₀ hf₀ => ?_) (iSup₂_le fun f₀ hf₀ => ?_) · rw [SimpleFunc.lintegral_map _ hg.measurable] have : (f₀.comp g hg.measurable : α → ℝ≥0∞) ≤ f ∘ g := fun x => hf₀ (g x) exact le_iSup_of_le (comp f₀ g hg.measurable) (by exact le_iSup (α := ℝ≥0∞) _ this...
import Mathlib.Order.Interval.Set.Basic import Mathlib.Data.Set.NAry import Mathlib.Order.Directed #align_import order.bounds.basic from "leanprover-community/mathlib"@"b1abe23ae96fef89ad30d9f4362c307f72a55010" open Function Set open OrderDual (toDual ofDual) universe u v w x variable {α : Type u} {β : Type v}...
Mathlib/Order/Bounds/Basic.lean
935
937
theorem bddAbove_insert [IsDirected α (· ≤ ·)] {s : Set α} {a : α} : BddAbove (insert a s) ↔ BddAbove s := by
simp only [insert_eq, bddAbove_union, bddAbove_singleton, true_and_iff]
import Mathlib.Algebra.Order.Group.Nat import Mathlib.Data.Finset.Antidiagonal import Mathlib.Data.Finset.Card import Mathlib.Data.Multiset.NatAntidiagonal #align_import data.finset.nat_antidiagonal from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" open Function namespace Finset name...
Mathlib/Data/Finset/NatAntidiagonal.lean
89
99
theorem antidiagonal_succ_succ' {n : ℕ} : antidiagonal (n + 2) = cons (0, n + 2) (cons (n + 2, 0) ((antidiagonal n).map (Embedding.prodMap ⟨Nat.succ, Nat.succ_injective⟩ ⟨Nat.succ, Nat.succ_injective⟩)) <| by simp) (by simp) := by
simp_rw [antidiagonal_succ (n + 1), antidiagonal_succ', Finset.map_cons, map_map] rfl
import Mathlib.Algebra.Homology.Additive import Mathlib.AlgebraicTopology.MooreComplex import Mathlib.Algebra.BigOperators.Fin import Mathlib.CategoryTheory.Preadditive.Opposite import Mathlib.CategoryTheory.Idempotents.FunctorCategories #align_import algebraic_topology.alternating_face_map_complex from "leanprover-c...
Mathlib/AlgebraicTopology/AlternatingFaceMapComplex.lean
70
112
theorem d_squared (n : ℕ) : objD X (n + 1) ≫ objD X n = 0 := by
-- we start by expanding d ≫ d as a double sum dsimp simp only [comp_sum, sum_comp, ← Finset.sum_product'] -- then, we decompose the index set P into a subset S and its complement Sᶜ let P := Fin (n + 2) × Fin (n + 3) let S := Finset.univ.filter fun ij : P => (ij.2 : ℕ) ≤ (ij.1 : ℕ) erw [← Finset.sum_add...
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
819
819
theorem disjoint_left : Disjoint l₁ l₂ ↔ ∀ ⦃a⦄, a ∈ l₁ → a ∉ l₂ := by
simp [Disjoint]
import Mathlib.MeasureTheory.Function.LpSeminorm.Basic import Mathlib.MeasureTheory.Integral.MeanInequalities #align_import measure_theory.function.lp_seminorm from "leanprover-community/mathlib"@"c4015acc0a223449d44061e27ddac1835a3852b9" open Filter open scoped ENNReal Topology namespace MeasureTheory variable ...
Mathlib/MeasureTheory/Function/LpSeminorm/TriangleInequality.lean
145
147
theorem snorm_sub_le {f g : α → E} (hf : AEStronglyMeasurable f μ) (hg : AEStronglyMeasurable g μ) (hp : 1 ≤ p) : snorm (f - g) p μ ≤ snorm f p μ + snorm g p μ := by
simpa [LpAddConst_of_one_le hp] using snorm_sub_le' hf hg p
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
319
322
theorem sdiff_lt (hx : y ≤ x) (hy : y ≠ ⊥) : x \ y < x := by
refine sdiff_le.lt_of_ne fun h => hy ?_ rw [sdiff_eq_self_iff_disjoint', disjoint_iff] at h rw [← h, inf_eq_right.mpr hx]
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
402
402
theorem arccos_eq_pi_div_two {x} : arccos x = π / 2 ↔ x = 0 := by
simp [arccos]
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Int.ModEq import Mathlib.Data.Nat.Bits import Mathlib.Data.Nat.Log import Mathlib.Data.List.Indexes import Mathlib.Data.List.Palindrome import Mathlib.Tactic.IntervalCases import Mathlib.Tactic.Linarith impo...
Mathlib/Data/Nat/Digits.lean
639
645
theorem dvd_ofDigits_sub_ofDigits {α : Type*} [CommRing α] {a b k : α} (h : k ∣ a - b) (L : List ℕ) : k ∣ ofDigits a L - ofDigits b L := by
induction' L with d L ih · change k ∣ 0 - 0 simp · simp only [ofDigits, add_sub_add_left_eq_sub] exact dvd_mul_sub_mul h ih
import Mathlib.Analysis.Asymptotics.AsymptoticEquivalent import Mathlib.Analysis.Normed.Group.Lemmas import Mathlib.Analysis.NormedSpace.AddTorsor import Mathlib.Analysis.NormedSpace.AffineIsometry import Mathlib.Analysis.NormedSpace.OperatorNorm.NormedSpace import Mathlib.Analysis.NormedSpace.RieszLemma import Mathli...
Mathlib/Analysis/NormedSpace/FiniteDimension.lean
317
320
theorem Basis.opNorm_le {ι : Type*} [Fintype ι] (v : Basis ι 𝕜 E) {u : E →L[𝕜] F} {M : ℝ} (hM : 0 ≤ M) (hu : ∀ i, ‖u (v i)‖ ≤ M) : ‖u‖ ≤ Fintype.card ι • ‖v.equivFunL.toContinuousLinearMap‖ * M := by
simpa using NNReal.coe_le_coe.mpr (v.opNNNorm_le ⟨M, hM⟩ hu)
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
199
220
theorem lintegral_eq_nnreal {m : MeasurableSpace α} (f : α → ℝ≥0∞) (μ : Measure α) : ∫⁻ a, f a ∂μ = ⨆ (φ : α →ₛ ℝ≥0) (_ : ∀ x, ↑(φ x) ≤ f x), (φ.map ((↑) : ℝ≥0 → ℝ≥0∞)).lintegral μ := by
rw [lintegral] refine le_antisymm (iSup₂_le fun φ hφ => ?_) (iSup_mono' fun φ => ⟨φ.map ((↑) : ℝ≥0 → ℝ≥0∞), le_rfl⟩) by_cases h : ∀ᵐ a ∂μ, φ a ≠ ∞ · let ψ := φ.map ENNReal.toNNReal replace h : ψ.map ((↑) : ℝ≥0 → ℝ≥0∞) =ᵐ[μ] φ := h.mono fun a => ENNReal.coe_toNNReal have : ∀ x, ↑(ψ x) ≤ f x := fun x...
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
222
222
theorem arg_neg_I : arg (-I) = -(π / 2) := by
simp [arg, le_refl]
import Mathlib.Data.Finset.Prod import Mathlib.Data.Set.Finite #align_import data.finset.n_ary from "leanprover-community/mathlib"@"eba7871095e834365616b5e43c8c7bb0b37058d0" open Function Set variable {α α' β β' γ γ' δ δ' ε ε' ζ ζ' ν : Type*} namespace Finset variable [DecidableEq α'] [DecidableEq β'] [Decidabl...
Mathlib/Data/Finset/NAry.lean
145
146
theorem image₂_eq_empty_iff : image₂ f s t = ∅ ↔ s = ∅ ∨ t = ∅ := by
simp_rw [← not_nonempty_iff_eq_empty, image₂_nonempty_iff, not_and_or]
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Int.ModEq import Mathlib.Data.Nat.Bits import Mathlib.Data.Nat.Log import Mathlib.Data.List.Indexes import Mathlib.Data.List.Palindrome import Mathlib.Tactic.IntervalCases import Mathlib.Tactic.Linarith impo...
Mathlib/Data/Nat/Digits.lean
267
287
theorem ofDigits_digits (b n : ℕ) : ofDigits b (digits b n) = n := by
cases' b with b · cases' n with n · rfl · change ofDigits 0 [n + 1] = n + 1 dsimp [ofDigits] · cases' b with b · induction' n with n ih · rfl · rw [Nat.zero_add] at ih ⊢ simp only [ih, add_comm 1, ofDigits_one_cons, Nat.cast_id, digits_one_succ] · apply Nat.strongInducti...
import Mathlib.Analysis.SpecialFunctions.Log.Base import Mathlib.MeasureTheory.Measure.MeasureSpaceDef #align_import measure_theory.measure.doubling from "leanprover-community/mathlib"@"5f6e827d81dfbeb6151d7016586ceeb0099b9655" noncomputable section open Set Filter Metric MeasureTheory TopologicalSpace ENNReal NN...
Mathlib/MeasureTheory/Measure/Doubling.lean
113
129
theorem eventually_measure_mul_le_scalingConstantOf_mul (K : ℝ) : ∃ R : ℝ, 0 < R ∧ ∀ x t r, t ∈ Ioc 0 K → r ≤ R → μ (closedBall x (t * r)) ≤ scalingConstantOf μ K * μ (closedBall x r) := by
have h := Classical.choose_spec (exists_eventually_forall_measure_closedBall_le_mul μ K) rcases mem_nhdsWithin_Ioi_iff_exists_Ioc_subset.1 h with ⟨R, Rpos, hR⟩ refine ⟨R, Rpos, fun x t r ht hr => ?_⟩ rcases lt_trichotomy r 0 with (rneg | rfl | rpos) · have : t * r < 0 := mul_neg_of_pos_of_neg ht.1 rneg s...
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
906
914
theorem translationNumber_lt_of_forall_lt_add (hf : Continuous f) {z : ℝ} (hz : ∀ x, f x < x + z) : τ f < z := by
obtain ⟨x, -, hx⟩ : ∃ x ∈ Icc (0 : ℝ) 1, ∀ y ∈ Icc (0 : ℝ) 1, f y - y ≤ f x - x := isCompact_Icc.exists_isMaxOn (nonempty_Icc.2 zero_le_one) (hf.sub continuous_id).continuousOn refine lt_of_le_of_lt ?_ (sub_lt_iff_lt_add'.2 <| hz x) apply translationNumber_le_of_le_add simp only [← sub_le_iff_le_add'...
import Mathlib.Topology.Sets.Opens #align_import topology.sets.closeds from "leanprover-community/mathlib"@"dc6c365e751e34d100e80fe6e314c3c3e0fd2988" open Order OrderDual Set variable {ι α β : Type*} [TopologicalSpace α] [TopologicalSpace β] namespace TopologicalSpace structure Closeds (α : Type*) [Topolog...
Mathlib/Topology/Sets/Closeds.lean
110
111
theorem coe_sup (s t : Closeds α) : (↑(s ⊔ t) : Set α) = ↑s ∪ ↑t := by
rfl
import Mathlib.Algebra.Order.Ring.Defs import Mathlib.Combinatorics.SimpleGraph.Basic import Mathlib.Data.Sym.Card open Finset Function namespace SimpleGraph variable {V : Type*} (G : SimpleGraph V) {e : Sym2 V} section EdgeFinset variable {G₁ G₂ : SimpleGraph V} [Fintype G.edgeSet] [Fintype G₁.edgeSet] [Finty...
Mathlib/Combinatorics/SimpleGraph/Finite.lean
125
127
theorem card_edgeFinset_top_eq_card_choose_two [DecidableEq V] : (⊤ : SimpleGraph V).edgeFinset.card = (Fintype.card V).choose 2 := by
simp_rw [Set.toFinset_card, edgeSet_top, Set.coe_setOf, ← Sym2.card_subtype_not_diag]
import Mathlib.Logic.Relation import Mathlib.Data.Option.Basic import Mathlib.Data.Seq.Seq #align_import data.seq.wseq from "leanprover-community/mathlib"@"a7e36e48519ab281320c4d192da6a7b348ce40ad" namespace Stream' open Function universe u v w def WSeq (α) := Seq (Option α) #align stream.wseq Stream'.WSeq ...
Mathlib/Data/Seq/WSeq.lean
893
896
theorem get?_terminates_le {s : WSeq α} {m n} (h : m ≤ n) : Terminates (get? s n) → Terminates (get? s m) := by
induction' h with m' _ IH exacts [id, fun T => IH (@head_terminates_of_head_tail_terminates _ _ T)]
import Mathlib.Algebra.GeomSum import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Algebra.Ring.Int import Mathlib.NumberTheory.Padics.PadicVal import Mathlib.RingTheory.Ideal.Quotient #align_import number_theory.multiplicity from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" open I...
Mathlib/NumberTheory/Multiplicity.lean
56
71
theorem sq_dvd_add_pow_sub_sub (p x : R) (n : ℕ) : p ^ 2 ∣ (x + p) ^ n - x ^ (n - 1) * p * n - x ^ n := by
cases' n with n n · simp only [pow_zero, Nat.cast_zero, sub_zero, sub_self, dvd_zero, Nat.zero_eq, mul_zero] · simp only [Nat.succ_sub_succ_eq_sub, tsub_zero, Nat.cast_succ, add_pow, Finset.sum_range_succ, Nat.choose_self, Nat.succ_sub _, tsub_self, pow_one, Nat.choose_succ_self_right, pow_zero, mul_...
import Mathlib.Algebra.Polynomial.RingDivision import Mathlib.RingTheory.Polynomial.Nilpotent open scoped Classical Polynomial open Polynomial noncomputable section
Mathlib/RingTheory/Polynomial/IrreducibleRing.lean
37
61
theorem Polynomial.Monic.irreducible_of_irreducible_map_of_isPrime_nilradical {R S : Type*} [CommRing R] [(nilradical R).IsPrime] [CommRing S] [IsDomain S] (φ : R →+* S) (f : R[X]) (hm : f.Monic) (hi : Irreducible (f.map φ)) : Irreducible f := by
let R' := R ⧸ nilradical R let ψ : R' →+* S := Ideal.Quotient.lift (nilradical R) φ (haveI := RingHom.ker_isPrime φ; nilradical_le_prime (RingHom.ker φ)) let ι := algebraMap R R' rw [show φ = ψ.comp ι from rfl, ← map_map] at hi replace hi := hm.map ι |>.irreducible_of_irreducible_map _ _ hi refine ⟨fun...
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Int.ModEq import Mathlib.Data.Nat.Bits import Mathlib.Data.Nat.Log import Mathlib.Data.List.Indexes import Mathlib.Data.List.Palindrome import Mathlib.Tactic.IntervalCases import Mathlib.Tactic.Linarith impo...
Mathlib/Data/Nat/Digits.lean
666
667
theorem ofDigits_mod_eq_head! (b : ℕ) (l : List ℕ) : ofDigits b l % b = l.head! % b := by
induction l <;> simp [Nat.ofDigits, Int.ModEq]
import Mathlib.RingTheory.IntegralClosure import Mathlib.RingTheory.FractionalIdeal.Basic #align_import ring_theory.fractional_ideal from "leanprover-community/mathlib"@"ed90a7d327c3a5caf65a6faf7e8a0d63c4605df7" open IsLocalization Pointwise nonZeroDivisors namespace FractionalIdeal open Set Submodule variable...
Mathlib/RingTheory/FractionalIdeal/Operations.lean
670
674
theorem eq_spanSingleton_of_principal (I : FractionalIdeal S P) [IsPrincipal (I : Submodule R P)] : I = spanSingleton S (generator (I : Submodule R P)) := by
-- Porting note: this used to be `coeToSubmodule_injective (span_singleton_generator ↑I).symm` -- but Lean 4 struggled to unify everything. Turned it into an explicit `rw`. rw [spanSingleton, ← coeToSubmodule_inj, coe_mk, span_singleton_generator]
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
225
228
theorem PreservesPushout.inl_iso_hom : pushout.inl ≫ (PreservesPushout.iso G f g).hom = G.map pushout.inl := by
delta PreservesPushout.iso simp
import Mathlib.Algebra.Bounds import Mathlib.Algebra.Order.Field.Basic -- Porting note: `LinearOrderedField`, etc import Mathlib.Data.Set.Pointwise.SMul #align_import algebra.order.pointwise from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" open Function Set open Pointwise variable ...
Mathlib/Algebra/Order/Pointwise.lean
160
162
theorem csSup_div (hs₀ : s.Nonempty) (hs₁ : BddAbove s) (ht₀ : t.Nonempty) (ht₁ : BddBelow t) : sSup (s / t) = sSup s / sInf t := by
rw [div_eq_mul_inv, csSup_mul hs₀ hs₁ ht₀.inv ht₁.inv, csSup_inv ht₀ ht₁, div_eq_mul_inv]
import Mathlib.MeasureTheory.Measure.Restrict open scoped ENNReal NNReal Topology open Set MeasureTheory Measure Filter Function MeasurableSpace ENNReal variable {α β δ ι : Type*} namespace MeasureTheory variable {m0 : MeasurableSpace α} [MeasurableSpace β] {μ ν ν₁ ν₂: Measure α} {s t : Set α} section IsFinit...
Mathlib/MeasureTheory/Measure/Typeclasses.lean
41
44
theorem not_isFiniteMeasure_iff : ¬IsFiniteMeasure μ ↔ μ Set.univ = ∞ := by
refine ⟨fun h => ?_, fun h => fun h' => h'.measure_univ_lt_top.ne h⟩ by_contra h' exact h ⟨lt_top_iff_ne_top.mpr h'⟩
import Mathlib.CategoryTheory.NatIso #align_import category_theory.bicategory.basic from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" namespace CategoryTheory universe w v u open Category Iso -- intended to be used with explicit universe parameters @[nolint checkUnivs] class Bicate...
Mathlib/CategoryTheory/Bicategory/Basic.lean
415
415
theorem whiskerRight_iff {f g : a ⟶ b} (η θ : f ⟶ g) : η ▷ 𝟙 b = θ ▷ 𝟙 b ↔ η = θ := by
simp
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
205
212
theorem polyOfInterest_vars_eq (n : ℕ) : (polyOfInterest p n).vars = ((p : 𝕄) ^ (n + 1) * (wittMul p (n + 1) + (p : 𝕄) ^ (n + 1) * X (0, n + 1) * X (1, n + 1) - X (0, n + 1) * rename (Prod.mk (1 : Fin 2)) (wittPolynomial p ℤ (n + 1)) - X (1, n + 1) * rename (Prod.mk (0 : Fin 2)) (wittPolynomial p ℤ (n...
have : (p : 𝕄) ^ (n + 1) = C ((p : ℤ) ^ (n + 1)) := by norm_cast rw [polyOfInterest, this, vars_C_mul] apply pow_ne_zero exact mod_cast hp.out.ne_zero
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
508
511
theorem coe_toIcoMod (θ ψ : ℝ) : ↑(toIcoMod two_pi_pos ψ θ) = (θ : Angle) := by
rw [angle_eq_iff_two_pi_dvd_sub] refine ⟨-toIcoDiv two_pi_pos ψ θ, ?_⟩ rw [toIcoMod_sub_self, zsmul_eq_mul, mul_comm]
import Mathlib.CategoryTheory.Bicategory.Basic import Mathlib.CategoryTheory.Monoidal.Mon_ import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Equalizers #align_import category_theory.monoidal.Bimod from "leanprover-community/mathlib"@"4698e35ca56a0d4fa53aa5639c3364e0a77f4eba" universe v₁ v₂ u₁ u₂ open Categor...
Mathlib/CategoryTheory/Monoidal/Bimod.lean
250
259
theorem one_act_left' : (R.one ▷ _) ≫ actLeft P Q = (λ_ _).hom := by
refine (cancel_epi ((tensorLeft _).map (coequalizer.π _ _))).1 ?_ dsimp [X] -- Porting note: had to replace `rw` by `erw` slice_lhs 1 2 => erw [whisker_exchange] slice_lhs 2 3 => rw [whiskerLeft_π_actLeft] slice_lhs 1 2 => rw [associator_inv_naturality_left] slice_lhs 2 3 => rw [← comp_whiskerRight, one_...
import Mathlib.Algebra.GeomSum import Mathlib.Algebra.Order.Ring.Basic import Mathlib.Algebra.Ring.Int import Mathlib.NumberTheory.Padics.PadicVal import Mathlib.RingTheory.Ideal.Quotient #align_import number_theory.multiplicity from "leanprover-community/mathlib"@"e8638a0fcaf73e4500469f368ef9494e495099b3" open I...
Mathlib/NumberTheory/Multiplicity.lean
39
43
theorem dvd_geom_sum₂_iff_of_dvd_sub {x y p : R} (h : p ∣ x - y) : (p ∣ ∑ i ∈ range n, x ^ i * y ^ (n - 1 - i)) ↔ p ∣ n * y ^ (n - 1) := by
rw [← mem_span_singleton, ← Ideal.Quotient.eq] at h simp only [← mem_span_singleton, ← eq_zero_iff_mem, RingHom.map_geom_sum₂, h, geom_sum₂_self, _root_.map_mul, map_pow, map_natCast]
import Mathlib.Order.Interval.Set.UnorderedInterval import Mathlib.Algebra.Order.Interval.Set.Monoid import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Algebra.Order.Field.Basic import Mathlib.Algebra.Order.Group.MinMax #align_import data.set.pointwise.interval from "leanprover-community/mathlib"@"2196ab363eb097c...
Mathlib/Data/Set/Pointwise/Interval.lean
634
635
theorem preimage_mul_const_Icc (a b : α) {c : α} (h : 0 < c) : (fun x => x * c) ⁻¹' Icc a b = Icc (a / c) (b / c) := by
simp [← Ici_inter_Iic, h]
import Mathlib.Algebra.Polynomial.AlgebraMap import Mathlib.Algebra.Polynomial.BigOperators import Mathlib.Algebra.Polynomial.Degree.Lemmas import Mathlib.Algebra.Polynomial.Div #align_import data.polynomial.ring_division from "leanprover-community/mathlib"@"8efcf8022aac8e01df8d302dcebdbc25d6a886c8" noncomputable ...
Mathlib/Algebra/Polynomial/RingDivision.lean
172
175
theorem eq_zero_of_dvd_of_natDegree_lt {p q : R[X]} (h₁ : p ∣ q) (h₂ : natDegree q < natDegree p) : q = 0 := by
by_contra hc exact (lt_iff_not_ge _ _).mp h₂ (natDegree_le_of_dvd h₁ hc)
import Mathlib.Algebra.Group.Prod import Mathlib.Data.Set.Lattice #align_import data.nat.pairing from "leanprover-community/mathlib"@"207cfac9fcd06138865b5d04f7091e46d9320432" assert_not_exists MonoidWithZero open Prod Decidable Function namespace Nat -- Porting note: no pp_nodot --@[pp_nodot] def pair (a b : ...
Mathlib/Data/Nat/Pairing.lean
64
73
theorem unpair_pair (a b : ℕ) : unpair (pair a b) = (a, b) := by
dsimp only [pair]; split_ifs with h · show unpair (b * b + a) = (a, b) have be : sqrt (b * b + a) = b := sqrt_add_eq _ (le_trans (le_of_lt h) (Nat.le_add_left _ _)) simp [unpair, be, Nat.add_sub_cancel_left, h] · show unpair (a * a + a + b) = (a, b) have ae : sqrt (a * a + (a + b)) = a := by rw...
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
574
575
theorem pos_size_of_mem [LE α] [@DecidableRel α (· ≤ ·)] {x : α} {t : Ordnode α} (h : Sized t) (h_mem : x ∈ t) : 0 < size t := by
cases t; · { contradiction }; · { simp [h.1] }
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Complex #align_import analysis.special_functions.trigonometric.arctan from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section namespace Real open Set Filter open scoped Topology Real theorem tan_add {x y : ℝ} ...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean
142
143
theorem sin_arctan (x : ℝ) : sin (arctan x) = x / √(1 + x ^ 2) := by
rw_mod_cast [← tan_div_sqrt_one_add_tan_sq (cos_arctan_pos x), tan_arctan]
import Mathlib.RingTheory.Derivation.ToSquareZero import Mathlib.RingTheory.Ideal.Cotangent import Mathlib.RingTheory.IsTensorProduct import Mathlib.Algebra.Exact import Mathlib.Algebra.MvPolynomial.PDeriv import Mathlib.Algebra.Polynomial.Derivation #align_import ring_theory.kaehler from "leanprover-community/mathli...
Mathlib/RingTheory/Kaehler.lean
565
567
theorem KaehlerDifferential.total_surjective : Function.Surjective (Finsupp.total S (Ω[S⁄R]) S (KaehlerDifferential.D R S)) := by
rw [← LinearMap.range_eq_top, Finsupp.range_total, KaehlerDifferential.span_range_derivation]
import Mathlib.Topology.Order.ProjIcc import Mathlib.Topology.ContinuousFunction.Ordered import Mathlib.Topology.CompactOpen import Mathlib.Topology.UnitInterval #align_import topology.homotopy.basic from "leanprover-community/mathlib"@"11c53f174270aa43140c0b26dabce5fc4a253e80" noncomputable section universe u v ...
Mathlib/Topology/Homotopy/Basic.lean
172
175
theorem extend_apply_of_one_le (F : Homotopy f₀ f₁) {t : ℝ} (ht : 1 ≤ t) (x : X) : F.extend t x = f₁ x := by
rw [← F.apply_one] exact ContinuousMap.congr_fun (Set.IccExtend_of_right_le (zero_le_one' ℝ) F.curry ht) x
import Mathlib.Algebra.BigOperators.NatAntidiagonal import Mathlib.Topology.Algebra.InfiniteSum.Constructions import Mathlib.Topology.Algebra.Ring.Basic #align_import topology.algebra.infinite_sum.ring from "leanprover-community/mathlib"@"9a59dcb7a2d06bf55da57b9030169219980660cd" open Filter Finset Function open...
Mathlib/Topology/Algebra/InfiniteSum/Ring.lean
38
39
theorem HasSum.mul_right (a₂) (hf : HasSum f a₁) : HasSum (fun i ↦ f i * a₂) (a₁ * a₂) := by
simpa only using hf.map (AddMonoidHom.mulRight a₂) (continuous_id.mul continuous_const)
import Mathlib.Algebra.CharZero.Lemmas import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Data.Real.Basic import Mathlib.Data.Set.Image #align_import data.complex.basic from "leanprover-community/mathlib"@"31c24aa72e7b3e5ed97a8412470e904f82b81004" open Set Function structure Complex : Type where...
Mathlib/Data/Complex/Basic.lean
262
262
theorem im_ofReal_mul (r : ℝ) (z : ℂ) : (r * z).im = r * z.im := by
simp [ofReal']
import Mathlib.Algebra.QuadraticDiscriminant import Mathlib.Analysis.Convex.SpecificFunctions.Deriv import Mathlib.Analysis.SpecialFunctions.Pow.Complex #align_import analysis.special_functions.trigonometric.complex from "leanprover-community/mathlib"@"8f9fea08977f7e450770933ee6abb20733b47c92" noncomputable secti...
Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean
114
116
theorem cos_eq_neg_one_iff {x : ℂ} : cos x = -1 ↔ ∃ k : ℤ, π + k * (2 * π) = x := by
rw [← neg_eq_iff_eq_neg, ← cos_sub_pi, cos_eq_one_iff] simp only [eq_sub_iff_add_eq']
import Mathlib.Analysis.InnerProductSpace.Basic import Mathlib.Analysis.NormedSpace.Banach import Mathlib.LinearAlgebra.SesquilinearForm #align_import analysis.inner_product_space.symmetric from "leanprover-community/mathlib"@"3f655f5297b030a87d641ad4e825af8d9679eb0b" open RCLike open ComplexConjugate variable ...
Mathlib/Analysis/InnerProductSpace/Symmetric.lean
97
110
theorem IsSymmetric.continuous [CompleteSpace E] {T : E →ₗ[𝕜] E} (hT : IsSymmetric T) : Continuous T := by
-- We prove it by using the closed graph theorem refine T.continuous_of_seq_closed_graph fun u x y hu hTu => ?_ rw [← sub_eq_zero, ← @inner_self_eq_zero 𝕜] have hlhs : ∀ k : ℕ, ⟪T (u k) - T x, y - T x⟫ = ⟪u k - x, T (y - T x)⟫ := by intro k rw [← T.map_sub, hT] refine tendsto_nhds_unique ((hTu.sub_c...
import Mathlib.Data.Matrix.Basic import Mathlib.Data.PEquiv #align_import data.matrix.pequiv from "leanprover-community/mathlib"@"3e068ece210655b7b9a9477c3aff38a492400aa1" namespace PEquiv open Matrix universe u v variable {k l m n : Type*} variable {α : Type v} open Matrix def toMatrix [DecidableEq n] [Zer...
Mathlib/Data/Matrix/PEquiv.lean
123
139
theorem toMatrix_injective [DecidableEq n] [MonoidWithZero α] [Nontrivial α] : Function.Injective (@toMatrix m n α _ _ _) := by
classical intro f g refine not_imp_not.1 ?_ simp only [Matrix.ext_iff.symm, toMatrix_apply, PEquiv.ext_iff, not_forall, exists_imp] intro i hi use i cases' hf : f i with fi · cases' hg : g i with gi -- Porting note: was `cc` · rw [hf, hg] at hi exact (hi rfl).elim ...
import Mathlib.Probability.Martingale.Convergence import Mathlib.Probability.Martingale.OptionalStopping import Mathlib.Probability.Martingale.Centering #align_import probability.martingale.borel_cantelli from "leanprover-community/mathlib"@"2196ab363eb097c008d4497125e0dde23fb36db2" open Filter open scoped NNRea...
Mathlib/Probability/Martingale/BorelCantelli.lean
287
287
theorem process_zero : process s 0 = 0 := by
rw [process, Finset.range_zero, Finset.sum_empty]
import Mathlib.Algebra.Lie.Subalgebra import Mathlib.RingTheory.Noetherian import Mathlib.RingTheory.Artinian #align_import algebra.lie.submodule from "leanprover-community/mathlib"@"9822b65bfc4ac74537d77ae318d27df1df662471" universe u v w w₁ w₂ section LieSubmodule variable (R : Type u) (L : Type v) (M : Type ...
Mathlib/Algebra/Lie/Submodule.lean
132
133
theorem coe_toSubmodule_mk (p : Submodule R M) (h) : (({ p with lie_mem := h } : LieSubmodule R L M) : Submodule R M) = p := by
cases p; rfl
import Mathlib.Topology.Algebra.Constructions import Mathlib.Topology.Bases import Mathlib.Topology.UniformSpace.Basic #align_import topology.uniform_space.cauchy from "leanprover-community/mathlib"@"22131150f88a2d125713ffa0f4693e3355b1eb49" universe u v open scoped Classical open Filter TopologicalSpace Set Uni...
Mathlib/Topology/UniformSpace/Cauchy.lean
202
204
theorem CauchySeq.tendsto_uniformity [Preorder β] {u : β → α} (h : CauchySeq u) : Tendsto (Prod.map u u) atTop (𝓤 α) := by
simpa only [Tendsto, prod_map_map_eq', prod_atTop_atTop_eq] using h.right
import Mathlib.Order.Interval.Set.UnorderedInterval import Mathlib.Algebra.Order.Interval.Set.Monoid import Mathlib.Data.Set.Pointwise.Basic import Mathlib.Algebra.Order.Field.Basic import Mathlib.Algebra.Order.Group.MinMax #align_import data.set.pointwise.interval from "leanprover-community/mathlib"@"2196ab363eb097c...
Mathlib/Data/Set/Pointwise/Interval.lean
363
363
theorem image_add_const_Iic : (fun x => x + a) '' Iic b = Iic (b + a) := by
simp
import Mathlib.ModelTheory.Substructures #align_import model_theory.finitely_generated from "leanprover-community/mathlib"@"0602c59878ff3d5f71dea69c2d32ccf2e93e5398" open FirstOrder Set namespace FirstOrder namespace Language open Structure variable {L : Language} {M : Type*} [L.Structure M] namespace Substru...
Mathlib/ModelTheory/FinitelyGenerated.lean
111
113
theorem FG.cg {N : L.Substructure M} (h : N.FG) : N.CG := by
obtain ⟨s, hf, rfl⟩ := fg_def.1 h exact ⟨s, hf.countable, rfl⟩
import Mathlib.Data.Real.Sqrt import Mathlib.Analysis.NormedSpace.Star.Basic import Mathlib.Analysis.NormedSpace.ContinuousLinearMap import Mathlib.Analysis.NormedSpace.Basic #align_import data.is_R_or_C.basic from "leanprover-community/mathlib"@"baa88307f3e699fa7054ef04ec79fa4f056169cb" section local notation "�...
Mathlib/Analysis/RCLike/Basic.lean
550
552
theorem div_re (z w : K) : re (z / w) = re z * re w / normSq w + im z * im w / normSq w := by
simp only [div_eq_mul_inv, mul_assoc, sub_eq_add_neg, neg_mul, mul_neg, neg_neg, map_neg, rclike_simps]
import Mathlib.Algebra.Module.Submodule.EqLocus import Mathlib.Algebra.Module.Submodule.RestrictScalars import Mathlib.Algebra.Ring.Idempotents import Mathlib.Data.Set.Pointwise.SMul import Mathlib.LinearAlgebra.Basic import Mathlib.Order.CompactlyGenerated.Basic import Mathlib.Order.OmegaCompletePartialOrder #align_...
Mathlib/LinearAlgebra/Span.lean
504
506
theorem span_singleton_eq_top_iff (x : M) : (R ∙ x) = ⊤ ↔ ∀ v, ∃ r : R, r • x = v := by
rw [eq_top_iff, le_span_singleton_iff] tauto
import Mathlib.Topology.MetricSpace.Basic #align_import topology.metric_space.infsep from "leanprover-community/mathlib"@"5316314b553dcf8c6716541851517c1a9715e22b" variable {α β : Type*} namespace Set section Einfsep open ENNReal open Function noncomputable def einfsep [EDist α] (s : Set α) : ℝ≥0∞ := ⨅ (x...
Mathlib/Topology/MetricSpace/Infsep.lean
163
166
theorem einfsep_eq_iInf : s.einfsep = ⨅ d : s.offDiag, (uncurry edist) (d : α × α) := by
refine eq_of_forall_le_iff fun _ => ?_ simp_rw [le_einfsep_iff, le_iInf_iff, imp_forall_iff, SetCoe.forall, mem_offDiag, Prod.forall, uncurry_apply_pair, and_imp]
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
55
59
theorem discr_prime_pow' [IsCyclotomicExtension {p ^ k} ℚ K] (hζ : IsPrimitiveRoot ζ ↑(p ^ k)) : discr ℚ (hζ.subOnePowerBasis ℚ).basis = (-1) ^ ((p ^ k : ℕ).totient / 2) * p ^ ((p : ℕ) ^ (k - 1) * ((p - 1) * k - 1)) := by
rw [← discr_prime_pow hζ (cyclotomic.irreducible_rat (p ^ k).pos)] exact hζ.discr_zeta_eq_discr_zeta_sub_one.symm
import Mathlib.Order.Filter.Lift import Mathlib.Topology.Defs.Filter #align_import topology.basic from "leanprover-community/mathlib"@"e354e865255654389cc46e6032160238df2e0f40" noncomputable section open Set Filter universe u v w x def TopologicalSpace.ofClosed {X : Type u} (T : Set (Set X)) (empty_mem : ∅ ∈...
Mathlib/Topology/Basic.lean
492
494
theorem closure_eq_compl_interior_compl : closure s = (interior sᶜ)ᶜ := by
rw [interior, closure, compl_sUnion, compl_image_set_of] simp only [compl_subset_compl, isOpen_compl_iff]
import Mathlib.CategoryTheory.Preadditive.AdditiveFunctor import Mathlib.CategoryTheory.Monoidal.Functor #align_import category_theory.monoidal.preadditive from "leanprover-community/mathlib"@"986c4d5761f938b2e1c43c01f001b6d9d88c2055" noncomputable section open scoped Classical namespace CategoryTheory open Cat...
Mathlib/CategoryTheory/Monoidal/Preadditive.lean
188
190
theorem biproduct_ι_comp_leftDistributor_inv {J : Type} [Fintype J] (X : C) (f : J → C) (j : J) : biproduct.ι _ j ≫ (leftDistributor X f).inv = X ◁ biproduct.ι _ j := by
simp [leftDistributor_inv, Preadditive.comp_sum, ← id_tensor_comp, biproduct.ι_π_assoc, dite_comp]
import Mathlib.Data.Countable.Basic import Mathlib.Data.Fin.VecNotation import Mathlib.Order.Disjointed import Mathlib.MeasureTheory.OuterMeasure.Defs #align_import measure_theory.measure.outer_measure from "leanprover-community/mathlib"@"343e80208d29d2d15f8050b929aa50fe4ce71b55" noncomputable section open Set F...
Mathlib/MeasureTheory/OuterMeasure/Basic.lean
63
69
theorem measure_iUnion_le [Countable ι] (s : ι → Set α) : μ (⋃ i, s i) ≤ ∑' i, μ (s i) := by
refine rel_iSup_tsum μ measure_empty (· ≤ ·) (fun t ↦ ?_) _ calc μ (⋃ i, t i) = μ (⋃ i, disjointed t i) := by rw [iUnion_disjointed] _ ≤ ∑' i, μ (disjointed t i) := OuterMeasureClass.measure_iUnion_nat_le _ _ (disjoint_disjointed _) _ ≤ ∑' i, μ (t i) := by gcongr; apply disjointed_subset
import Mathlib.Algebra.Category.GroupCat.EquivalenceGroupAddGroup import Mathlib.GroupTheory.QuotientGroup #align_import algebra.category.Group.epi_mono from "leanprover-community/mathlib"@"70fd9563a21e7b963887c9360bd29b2393e6225a" noncomputable section open scoped Pointwise universe u v namespace MonoidHom o...
Mathlib/Algebra/Category/GroupCat/EpiMono.lean
35
36
theorem ker_eq_bot_of_cancel {f : A →* B} (h : ∀ u v : f.ker →* A, f.comp u = f.comp v → u = v) : f.ker = ⊥ := by
simpa using _root_.congr_arg range (h f.ker.subtype 1 (by aesop_cat))
import Mathlib.Topology.Bases import Mathlib.Order.Filter.CountableInter import Mathlib.Topology.Compactness.SigmaCompact open Set Filter Topology TopologicalSpace universe u v variable {X : Type u} {Y : Type v} {ι : Type*} variable [TopologicalSpace X] [TopologicalSpace Y] {s t : Set X} section Lindelof def I...
Mathlib/Topology/Compactness/Lindelof.lean
182
192
theorem IsLindelof.disjoint_nhdsSet_left {l : Filter X} [CountableInterFilter l] (hs : IsLindelof s) : Disjoint (𝓝ˢ s) l ↔ ∀ x ∈ s, Disjoint (𝓝 x) l := by
refine ⟨fun h x hx ↦ h.mono_left <| nhds_le_nhdsSet hx, fun H ↦ ?_⟩ choose! U hxU hUl using fun x hx ↦ (nhds_basis_opens x).disjoint_iff_left.1 (H x hx) choose hxU hUo using hxU rcases hs.elim_nhds_subcover U fun x hx ↦ (hUo x hx).mem_nhds (hxU x hx) with ⟨t, htc, hts, hst⟩ refine (hasBasis_nhdsSet _).disjoi...
import Mathlib.Topology.Algebra.Module.WeakDual import Mathlib.MeasureTheory.Integral.BoundedContinuousFunction import Mathlib.MeasureTheory.Measure.HasOuterApproxClosed #align_import measure_theory.measure.finite_measure from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable...
Mathlib/MeasureTheory/Measure/FiniteMeasure.lean
396
404
theorem testAgainstNN_smul [IsScalarTower R ℝ≥0 ℝ≥0] [PseudoMetricSpace R] [Zero R] [BoundedSMul R ℝ≥0] (μ : FiniteMeasure Ω) (c : R) (f : Ω →ᵇ ℝ≥0) : μ.testAgainstNN (c • f) = c • μ.testAgainstNN f := by
simp only [← ENNReal.coe_inj, BoundedContinuousFunction.coe_smul, testAgainstNN_coe_eq, ENNReal.coe_smul] simp_rw [← smul_one_smul ℝ≥0∞ c (f _ : ℝ≥0∞), ← smul_one_smul ℝ≥0∞ c (lintegral _ _ : ℝ≥0∞), smul_eq_mul] exact @lintegral_const_mul _ _ (μ : Measure Ω) (c • (1 : ℝ≥0∞)) _ f.measurable_coe_ennrea...
import Mathlib.Analysis.NormedSpace.AddTorsorBases #align_import analysis.convex.intrinsic from "leanprover-community/mathlib"@"f0c8bf9245297a541f468be517f1bde6195105e9" open AffineSubspace Set open scoped Pointwise variable {𝕜 V W Q P : Type*} section AddTorsor variable (𝕜) [Ring 𝕜] [AddCommGroup V] [Modu...
Mathlib/Analysis/Convex/Intrinsic.lean
142
143
theorem intrinsicFrontier_singleton (x : P) : intrinsicFrontier 𝕜 ({x} : Set P) = ∅ := by
rw [intrinsicFrontier, preimage_coe_affineSpan_singleton, frontier_univ, image_empty]
import Mathlib.Analysis.Calculus.Deriv.Mul import Mathlib.Analysis.Calculus.Deriv.Comp #align_import analysis.calculus.deriv.inv from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w open scoped Classical open Topology Filter ENNReal open Filter Asymptotics Set open Cont...
Mathlib/Analysis/Calculus/Deriv/Inv.lean
114
115
theorem fderiv_inv : fderiv 𝕜 (fun x => x⁻¹) x = smulRight (1 : 𝕜 →L[𝕜] 𝕜) (-(x ^ 2)⁻¹) := by
rw [← deriv_fderiv, deriv_inv]
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
461
478
theorem toLaurent_support (f : R[X]) : f.toLaurent.support = f.support.map Nat.castEmbedding := by
generalize hd : f.support = s revert f refine Finset.induction_on s ?_ ?_ <;> clear s · simp (config := { contextual := true }) only [Polynomial.support_eq_empty, map_zero, Finsupp.support_zero, eq_self_iff_true, imp_true_iff, Finset.map_empty, Finsupp.support_eq_empty] · intro a s as hf f fs ...
import Batteries.Classes.Order import Batteries.Control.ForInStep.Basic namespace Batteries namespace BinomialHeap namespace Imp inductive HeapNode (α : Type u) where | nil : HeapNode α | node (a : α) (child sibling : HeapNode α) : HeapNode α deriving Repr @[simp] def HeapNode.realSize : HeapNode α → ...
.lake/packages/batteries/Batteries/Data/BinomialHeap/Basic.lean
247
257
theorem Heap.realSize_deleteMin {s : Heap α} (eq : s.deleteMin le = some (a, s')) : s.realSize = s'.realSize + 1 := by
cases s with cases eq | cons r a c s => ?_ have : (s.findMin le (cons r a c) ⟨id, a, c, s⟩).HasSize (c.realSize + s.realSize + 1) := Heap.realSize_findMin (c.realSize + 1) (by simp) (Nat.add_right_comm ..) ⟨0, by simp⟩ revert this match s.findMin le (cons r a c) ⟨id, a, c, s⟩ with | { before, val, node, ...
import Mathlib.Algebra.CharZero.Defs import Mathlib.Algebra.Group.Pi.Basic import Mathlib.Algebra.Group.Units import Mathlib.Algebra.GroupWithZero.NeZero import Mathlib.Algebra.Order.Group.Defs import Mathlib.Algebra.Order.GroupWithZero.Unbundled import Mathlib.Algebra.Order.Monoid.Canonical.Defs import Mathlib.Algebr...
Mathlib/Algebra/Order/Ring/Defs.lean
319
321
theorem bit1_pos' (h : 0 < a) : 0 < bit1 a := by
nontriviality exact bit1_pos h.le
import Mathlib.Analysis.Calculus.ContDiff.Basic import Mathlib.Analysis.Calculus.ParametricIntegral import Mathlib.MeasureTheory.Constructions.Prod.Integral import Mathlib.MeasureTheory.Function.LocallyIntegrable import Mathlib.MeasureTheory.Group.Integral import Mathlib.MeasureTheory.Group.Prod import Mathlib.Measure...
Mathlib/Analysis/Convolution.lean
494
497
theorem ConvolutionExistsAt.distrib_add {x : G} (hfg : ConvolutionExistsAt f g x L μ) (hfg' : ConvolutionExistsAt f g' x L μ) : (f ⋆[L, μ] (g + g')) x = (f ⋆[L, μ] g) x + (f ⋆[L, μ] g') x := by
simp only [convolution_def, (L _).map_add, Pi.add_apply, integral_add hfg hfg']
import Mathlib.Analysis.Calculus.Deriv.Basic import Mathlib.Analysis.Calculus.FDeriv.Add #align_import analysis.calculus.deriv.add from "leanprover-community/mathlib"@"3bce8d800a6f2b8f63fe1e588fd76a9ff4adcebe" universe u v w open scoped Classical open Topology Filter ENNReal open Filter Asymptotics Set variable...
Mathlib/Analysis/Calculus/Deriv/Add.lean
97
99
theorem derivWithin_add_const (hxs : UniqueDiffWithinAt 𝕜 s x) (c : F) : derivWithin (fun y => f y + c) s x = derivWithin f s x := by
simp only [derivWithin, fderivWithin_add_const hxs]
import Mathlib.Algebra.BigOperators.Pi import Mathlib.Algebra.BigOperators.Ring import Mathlib.Algebra.Order.BigOperators.Ring.Finset import Mathlib.Algebra.BigOperators.Fin import Mathlib.Algebra.Group.Submonoid.Membership import Mathlib.Data.Finsupp.Fin import Mathlib.Data.Finsupp.Indicator #align_import algebra.bi...
Mathlib/Algebra/BigOperators/Finsupp.lean
54
57
theorem prod_of_support_subset (f : α →₀ M) {s : Finset α} (hs : f.support ⊆ s) (g : α → M → N) (h : ∀ i ∈ s, g i 0 = 1) : f.prod g = ∏ x ∈ s, g x (f x) := by
refine Finset.prod_subset hs fun x hxs hx => h x hxs ▸ (congr_arg (g x) ?_) exact not_mem_support_iff.1 hx
import Mathlib.Data.List.Sublists import Mathlib.Data.Multiset.Bind #align_import data.multiset.powerset from "leanprover-community/mathlib"@"9003f28797c0664a49e4179487267c494477d853" namespace Multiset open List variable {α : Type*} -- Porting note (#11215): TODO: Write a more efficient version def powerset...
Mathlib/Data/Multiset/Powerset.lean
55
57
theorem powersetAux'_cons (a : α) (l : List α) : powersetAux' (a :: l) = powersetAux' l ++ List.map (cons a) (powersetAux' l) := by
simp only [powersetAux', sublists'_cons, map_append, List.map_map, append_cancel_left_eq]; rfl
import Mathlib.Analysis.SpecialFunctions.Trigonometric.Bounds #align_import data.real.pi.bounds from "leanprover-community/mathlib"@"402f8982dddc1864bd703da2d6e2ee304a866973" -- Porting note: needed to add a lot of type ascriptions for lean to interpret numbers as reals. open scoped Real namespace Real theorem ...
Mathlib/Data/Real/Pi/Bounds.lean
128
136
theorem pi_upper_bound_start (n : ℕ) {a} (h : (2 : ℝ) - ((a - 1 / (4 : ℝ) ^ n) / (2 : ℝ) ^ (n + 1)) ^ 2 ≤ sqrtTwoAddSeries ((0 : ℕ) / (1 : ℕ)) n) (h₂ : (1 : ℝ) / (4 : ℝ) ^ n ≤ a) : π < a := by
refine lt_of_lt_of_le (pi_lt_sqrtTwoAddSeries n) ?_ rw [← le_sub_iff_add_le, ← le_div_iff', sqrt_le_left, sub_le_comm] · rwa [Nat.cast_zero, zero_div] at h · exact div_nonneg (sub_nonneg.2 h₂) (pow_nonneg (le_of_lt zero_lt_two) _) · exact pow_pos zero_lt_two _
import Mathlib.Order.Interval.Set.Image import Mathlib.Order.CompleteLatticeIntervals import Mathlib.Topology.Order.DenselyOrdered import Mathlib.Topology.Order.Monotone #align_import topology.algebra.order.intermediate_value from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514" open Filt...
Mathlib/Topology/Order/IntermediateValue.lean
743
761
theorem Continuous.strictMono_of_inj {f : α → δ} (hf_c : Continuous f) (hf_i : Injective f) : StrictMono f ∨ StrictAnti f := by
have H {c d : α} (hcd : c < d) : StrictMono f ∨ StrictAnti f := (hf_c.continuousOn.strictMonoOn_of_injOn_Icc' hcd.le hf_i.injOn).imp (hf_c.strictMonoOn_of_inj_rigidity hf_i hcd) (hf_c.strictMonoOn_of_inj_rigidity (δ := δᵒᵈ) hf_i hcd) by_cases hn : Nonempty α · let a : α := Classical.choice ‹_› ...
import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Int.ModEq import Mathlib.Data.Nat.Bits import Mathlib.Data.Nat.Log import Mathlib.Data.List.Indexes import Mathlib.Data.List.Palindrome import Mathlib.Tactic.IntervalCases import Mathlib.Tactic.Linarith impo...
Mathlib/Data/Nat/Digits.lean
379
385
theorem mul_ofDigits (n : ℕ) {b : ℕ} {l : List ℕ} : n * ofDigits b l = ofDigits b (l.map (n * ·)) := by
induction l with | nil => rfl | cons hd tl ih => rw [List.map_cons, ofDigits_cons, ofDigits_cons, ← ih] ring
import Mathlib.Analysis.SpecialFunctions.Pow.Asymptotics import Mathlib.NumberTheory.Liouville.Basic import Mathlib.Topology.Instances.Irrational #align_import number_theory.liouville.liouville_with from "leanprover-community/mathlib"@"0b9eaaa7686280fad8cce467f5c3c57ee6ce77f8" open Filter Metric Real Set open sc...
Mathlib/NumberTheory/Liouville/LiouvilleWith.lean
225
225
theorem nat_add_iff : LiouvilleWith p (n + x) ↔ LiouvilleWith p x := by
rw [add_comm, add_nat_iff]
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
256
258
theorem mk_preimage_prod_left_fn_eq_if [DecidablePred (· ∈ t)] (f : γ → α) : (fun a => (f a, b)) ⁻¹' s ×ˢ t = if b ∈ t then f ⁻¹' s else ∅ := by
rw [← mk_preimage_prod_left_eq_if, prod_preimage_left, preimage_preimage]
import Mathlib.AlgebraicGeometry.AffineScheme import Mathlib.AlgebraicGeometry.Pullbacks import Mathlib.CategoryTheory.MorphismProperty.Limits import Mathlib.Data.List.TFAE #align_import algebraic_geometry.morphisms.basic from "leanprover-community/mathlib"@"434e2fd21c1900747afc6d13d8be7f4eedba7218" set_option lin...
Mathlib/AlgebraicGeometry/Morphisms/Basic.lean
590
605
theorem universallyIsLocalAtTarget (P : MorphismProperty Scheme) (hP : ∀ {X Y : Scheme.{u}} (f : X ⟶ Y) (𝒰 : Scheme.OpenCover.{u} Y), (∀ i : 𝒰.J, P (pullback.snd : (𝒰.pullbackCover f).obj i ⟶ 𝒰.obj i)) → P f) : PropertyIsLocalAtTarget P.universally := by
refine ⟨P.universally_respectsIso, fun {X Y} f U => P.universally_stableUnderBaseChange (isPullback_morphismRestrict f U).flip, ?_⟩ intro X Y f 𝒰 h X' Y' i₁ i₂ f' H apply hP _ (𝒰.pullbackCover i₂) intro i dsimp apply h i (pullback.lift (pullback.fst ≫ i₁) (pullback.snd ≫ pullback.snd) _) pullback.snd...
import Mathlib.Topology.Compactness.SigmaCompact import Mathlib.Topology.Connected.TotallyDisconnected import Mathlib.Topology.Inseparable #align_import topology.separation from "leanprover-community/mathlib"@"d91e7f7a7f1c7e9f0e18fdb6bde4f652004c735d" open Function Set Filter Topology TopologicalSpace open scoped...
Mathlib/Topology/Separation.lean
326
340
theorem exists_isOpen_singleton_of_isOpen_finite [T0Space X] {s : Set X} (hfin : s.Finite) (hne : s.Nonempty) (ho : IsOpen s) : ∃ x ∈ s, IsOpen ({x} : Set X) := by
lift s to Finset X using hfin induction' s using Finset.strongInductionOn with s ihs rcases em (∃ t, t ⊂ s ∧ t.Nonempty ∧ IsOpen (t : Set X)) with (⟨t, hts, htne, hto⟩ | ht) · rcases ihs t hts htne hto with ⟨x, hxt, hxo⟩ exact ⟨x, hts.1 hxt, hxo⟩ · -- Porting note: was `rcases minimal_nonempty_open_eq_si...
import Mathlib.LinearAlgebra.Dimension.Finrank import Mathlib.LinearAlgebra.InvariantBasisNumber #align_import linear_algebra.dimension from "leanprover-community/mathlib"@"47a5f8186becdbc826190ced4312f8199f9db6a5" noncomputable section universe u v w w' variable {R : Type u} {M : Type v} [Ring R] [AddCommGroup...
Mathlib/LinearAlgebra/Dimension/StrongRankCondition.lean
214
220
theorem linearIndependent_le_span' {ι : Type*} (v : ι → M) (i : LinearIndependent R v) (w : Set M) [Fintype w] (s : range v ≤ span R w) : #ι ≤ Fintype.card w := by
haveI : Finite ι := i.finite_of_le_span_finite v w s letI := Fintype.ofFinite ι rw [Cardinal.mk_fintype] simp only [Cardinal.natCast_le] exact linearIndependent_le_span_aux' v i w s
import Mathlib.Data.ENNReal.Real import Mathlib.Order.Interval.Finset.Nat import Mathlib.Topology.UniformSpace.Pi import Mathlib.Topology.UniformSpace.UniformConvergence import Mathlib.Topology.UniformSpace.UniformEmbedding #align_import topology.metric_space.emetric_space from "leanprover-community/mathlib"@"c8f3055...
Mathlib/Topology/EMetricSpace/Basic.lean
751
752
theorem inseparable_iff : Inseparable x y ↔ edist x y = 0 := by
simp [inseparable_iff_mem_closure, mem_closure_iff, edist_comm, forall_lt_iff_le']
import Mathlib.Data.List.Nodup import Mathlib.Data.List.Zip import Mathlib.Data.Nat.Defs import Mathlib.Data.List.Infix #align_import data.list.rotate from "leanprover-community/mathlib"@"f694c7dead66f5d4c80f446c796a5aad14707f0e" universe u variable {α : Type u} open Nat Function namespace List theorem rotate...
Mathlib/Data/List/Rotate.lean
512
513
theorem isRotated_reverse_iff : l.reverse ~r l'.reverse ↔ l ~r l' := by
simp [isRotated_reverse_comm_iff]
import Mathlib.Analysis.Asymptotics.AsymptoticEquivalent import Mathlib.Analysis.Calculus.FDeriv.Linear import Mathlib.Analysis.Calculus.FDeriv.Comp #align_import analysis.calculus.fderiv.equiv from "leanprover-community/mathlib"@"e3fb84046afd187b710170887195d50bada934ee" open Filter Asymptotics ContinuousLinearMa...
Mathlib/Analysis/Calculus/FDeriv/Equiv.lean
145
149
theorem comp_hasFDerivWithinAt_iff' {f : G → E} {s : Set G} {x : G} {f' : G →L[𝕜] F} : HasFDerivWithinAt (iso ∘ f) f' s x ↔ HasFDerivWithinAt f ((iso.symm : F →L[𝕜] E).comp f') s x := by
rw [← iso.comp_hasFDerivWithinAt_iff, ← ContinuousLinearMap.comp_assoc, iso.coe_comp_coe_symm, ContinuousLinearMap.id_comp]
import Mathlib.MeasureTheory.Measure.NullMeasurable import Mathlib.MeasureTheory.MeasurableSpace.Basic import Mathlib.Topology.Algebra.Order.LiminfLimsup #align_import measure_theory.measure.measure_space from "leanprover-community/mathlib"@"343e80208d29d2d15f8050b929aa50fe4ce71b55" noncomputable section open Set...
Mathlib/MeasureTheory/Measure/MeasureSpace.lean
209
211
theorem tsum_measure_preimage_singleton {s : Set β} (hs : s.Countable) {f : α → β} (hf : ∀ y ∈ s, MeasurableSet (f ⁻¹' {y})) : (∑' b : s, μ (f ⁻¹' {↑b})) = μ (f ⁻¹' s) := by
rw [← Set.biUnion_preimage_singleton, measure_biUnion hs (pairwiseDisjoint_fiber f s) hf]
import Mathlib.MeasureTheory.Constructions.Pi import Mathlib.MeasureTheory.Integral.Lebesgue open scoped Classical ENNReal open Set Function Equiv Finset noncomputable section namespace MeasureTheory section LMarginal variable {δ δ' : Type*} {π : δ → Type*} [∀ x, MeasurableSpace (π x)] variable {μ : ∀ i, Measu...
Mathlib/MeasureTheory/Integral/Marginal.lean
237
242
theorem lintegral_eq_of_lmarginal_eq [Fintype δ] (s : Finset δ) {f g : (∀ i, π i) → ℝ≥0∞} (hf : Measurable f) (hg : Measurable g) (hfg : ∫⋯∫⁻_s, f ∂μ = ∫⋯∫⁻_s, g ∂μ) : ∫⁻ x, f x ∂Measure.pi μ = ∫⁻ x, g x ∂Measure.pi μ := by
rcases isEmpty_or_nonempty (∀ i, π i) with h|⟨⟨x⟩⟩ · simp_rw [lintegral_of_isEmpty] simp_rw [lintegral_eq_lmarginal_univ x, lmarginal_eq_of_subset (Finset.subset_univ s) hf hg hfg]
import Mathlib.Topology.UniformSpace.UniformConvergence import Mathlib.Topology.UniformSpace.Equicontinuity import Mathlib.Topology.Separation import Mathlib.Topology.Support #align_import topology.uniform_space.compact from "leanprover-community/mathlib"@"735b22f8f9ff9792cf4212d7cb051c4c994bc685" open scoped Cla...
Mathlib/Topology/UniformSpace/Compact.lean
181
193
theorem IsCompact.uniformContinuousAt_of_continuousAt {r : Set (β × β)} {s : Set α} (hs : IsCompact s) (f : α → β) (hf : ∀ a ∈ s, ContinuousAt f a) (hr : r ∈ 𝓤 β) : { x : α × α | x.1 ∈ s → (f x.1, f x.2) ∈ r } ∈ 𝓤 α := by
obtain ⟨t, ht, htsymm, htr⟩ := comp_symm_mem_uniformity_sets hr choose U hU T hT hb using fun a ha => exists_mem_nhds_ball_subset_of_mem_nhds ((hf a ha).preimage_mem_nhds <| mem_nhds_left _ ht) obtain ⟨fs, hsU⟩ := hs.elim_nhds_subcover' U hU apply mem_of_superset ((biInter_finset_mem fs).2 fun a _ => hT a ...
import Mathlib.MeasureTheory.Function.SimpleFuncDenseLp #align_import measure_theory.integral.set_to_l1 from "leanprover-community/mathlib"@"f2ce6086713c78a7f880485f7917ea547a215982" noncomputable section open scoped Classical Topology NNReal ENNReal MeasureTheory Pointwise open Set Filter TopologicalSpace ENNR...
Mathlib/MeasureTheory/Integral/SetToL1.lean
105
109
theorem add (hT : FinMeasAdditive μ T) (hT' : FinMeasAdditive μ T') : FinMeasAdditive μ (T + T') := by
intro s t hs ht hμs hμt hst simp only [hT s t hs ht hμs hμt hst, hT' s t hs ht hμs hμt hst, Pi.add_apply] abel
import Mathlib.Algebra.BigOperators.Ring import Mathlib.Combinatorics.Derangements.Basic import Mathlib.Data.Fintype.BigOperators import Mathlib.Tactic.Ring #align_import combinatorics.derangements.finite from "leanprover-community/mathlib"@"c3019c79074b0619edb4b27553a91b2e82242395" open derangements Equiv Fintyp...
Mathlib/Combinatorics/Derangements/Finite.lean
87
92
theorem numDerangements_succ (n : ℕ) : (numDerangements (n + 1) : ℤ) = (n + 1) * (numDerangements n : ℤ) - (-1) ^ n := by
induction' n with n hn · rfl · simp only [numDerangements_add_two, hn, pow_succ, Int.ofNat_mul, Int.ofNat_add, Int.ofNat_succ] ring
import Mathlib.Analysis.NormedSpace.Star.GelfandDuality import Mathlib.Topology.Algebra.StarSubalgebra #align_import analysis.normed_space.star.continuous_functional_calculus from "leanprover-community/mathlib"@"31c24aa72e7b3e5ed97a8412470e904f82b81004" open scoped Pointwise ENNReal NNReal ComplexOrder open Weak...
Mathlib/Analysis/NormedSpace/Star/ContinuousFunctionalCalculus.lean
81
94
theorem spectrum_star_mul_self_of_isStarNormal : spectrum ℂ (star a * a) ⊆ Set.Icc (0 : ℂ) ‖star a * a‖ := by
-- this instance should be found automatically, but without providing it Lean goes on a wild -- goose chase when trying to apply `spectrum.gelfandTransform_eq`. --letI := elementalStarAlgebra.Complex.normedAlgebra a rcases subsingleton_or_nontrivial A with ⟨⟩ · simp only [spectrum.of_subsingleton, Set.empty_...
import Mathlib.Analysis.Analytic.Basic import Mathlib.Combinatorics.Enumerative.Composition #align_import analysis.analytic.composition from "leanprover-community/mathlib"@"ce11c3c2a285bbe6937e26d9792fda4e51f3fe1a" noncomputable section variable {𝕜 : Type*} {E F G H : Type*} open Filter List open scoped Topol...
Mathlib/Analysis/Analytic/Composition.lean
166
169
theorem compContinuousLinearMap_applyComposition {n : ℕ} (p : FormalMultilinearSeries 𝕜 F G) (f : E →L[𝕜] F) (c : Composition n) (v : Fin n → E) : (p.compContinuousLinearMap f).applyComposition c v = p.applyComposition c (f ∘ v) := by
simp (config := {unfoldPartialApp := true}) [applyComposition]; rfl
import Mathlib.Combinatorics.SimpleGraph.Subgraph import Mathlib.Data.List.Rotate #align_import combinatorics.simple_graph.connectivity from "leanprover-community/mathlib"@"b99e2d58a5e6861833fa8de11e51a81144258db4" open Function universe u v w namespace SimpleGraph variable {V : Type u} {V' : Type v} {V'' : Typ...
Mathlib/Combinatorics/SimpleGraph/Connectivity.lean
645
646
theorem coe_support {u v : V} (p : G.Walk u v) : (p.support : Multiset V) = {u} + p.support.tail := by
cases p <;> rfl
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
968
969
theorem add_congr (_ : a = a') (_ : b = b') (_ : a' + b' = c) : (a + b : R) = c := by
subst_vars; rfl
import Mathlib.Algebra.Polynomial.Degree.Definitions import Mathlib.Algebra.Polynomial.Eval import Mathlib.Algebra.Polynomial.Monic import Mathlib.Algebra.Polynomial.RingDivision import Mathlib.Tactic.Abel #align_import ring_theory.polynomial.pochhammer from "leanprover-community/mathlib"@"53b216bcc1146df1c4a0a868778...
Mathlib/RingTheory/Polynomial/Pochhammer.lean
295
295
theorem descPochhammer_zero_eval_zero : (descPochhammer R 0).eval 0 = 1 := by
simp
import Mathlib.CategoryTheory.Functor.FullyFaithful import Mathlib.CategoryTheory.FullSubcategory import Mathlib.CategoryTheory.Whiskering import Mathlib.CategoryTheory.EssentialImage import Mathlib.Tactic.CategoryTheory.Slice #align_import category_theory.equivalence from "leanprover-community/mathlib"@"9aba7801eeec...
Mathlib/CategoryTheory/Equivalence.lean
214
217
theorem unit_app_inverse (e : C ≌ D) (Y : D) : e.unit.app (e.inverse.obj Y) = e.inverse.map (e.counitInv.app Y) := by
erw [← Iso.comp_hom_eq_id (e.inverse.mapIso (e.counitIso.app Y)), unit_inverse_comp] dsimp