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/- Copyright (c) 2020 Markus Himmel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Markus Himmel, Johan Commelin, Kim Morrison -/ import Mathlib.CategoryTheory.Limits.Constructions.Pullbacks import Mathlib.CategoryTheory.Preadditive.Biproducts import Mathlib.CategoryT...
Mathlib/CategoryTheory/Abelian/Basic.lean
808
811
/- Copyright (c) 2020 Fox Thomson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Fox Thomson, Markus Himmel -/ import Mathlib.SetTheory.Game.Birthday import Mathlib.SetTheory.Game.Impartial import Mathlib.SetTheory.Nimber.Basic /-! # Nim and the Sprague-Grundy theore...
exact IH _ (typein_lt_self i) @[simp]
Mathlib/SetTheory/Game/Nim.lean
182
184
/- Copyright (c) 2019 Jean Lo. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jean Lo, Yaël Dillies, Moritz Doll -/ import Mathlib.Algebra.Order.Pi import Mathlib.Analysis.Convex.Function import Mathlib.Analysis.LocallyConvex.Basic import Mathlib.Data.Real.Pointwise /...
section SMul variable [SMul ℝ E] [IsScalarTower ℝ 𝕜 E] (p : Seminorm 𝕜 E) /-- A seminorm is convex. Also see `convexOn_norm`. -/ protected theorem convexOn : ConvexOn ℝ univ p := by refine ⟨convex_univ, fun x _ y _ a b ha hb _ => ?_⟩ calc
Mathlib/Analysis/Seminorm.lean
976
983
/- Copyright (c) 2022 Jakob von Raumer. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jakob von Raumer, Kevin Klinge, Andrew Yang -/ import Mathlib.Algebra.Algebra.Defs import Mathlib.Algebra.Field.Defs import Mathlib.Algebra.GroupWithZero.NonZeroDivisors import Math...
variable {R : Type*} [Ring R] {S : Submonoid R} [OreSet S] variable {X : Type*} [AddCommGroup X] [Module R X]
Mathlib/RingTheory/OreLocalization/Ring.lean
182
184
/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Sébastien Gouëzel, Yury Kudryashov -/ import Mathlib.Dynamics.Ergodic.MeasurePreserving import Mathlib.LinearAlgebra.Determinant import Mathlib.LinearAlgebra.Matrix.Dia...
instance isFiniteMeasure_restrict_Ioc (x y : ℝ) : IsFiniteMeasure (volume.restrict (Ioc x y)) := ⟨by simp⟩ instance isFiniteMeasure_restrict_Ioo (x y : ℝ) : IsFiniteMeasure (volume.restrict (Ioo x y)) := ⟨by simp⟩
Mathlib/MeasureTheory/Measure/Lebesgue/Basic.lean
200
204
/- Copyright (c) 2022 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Y. Lewis, Heather Macbeth -/ import Mathlib.Algebra.MvPolynomial.Supported import Mathlib.RingTheory.WittVector.Truncated /-! # Leading terms of Witt vector multiplication Th...
coefficients of the inputs. -/ def nthRemainder (n : ℕ) : (Fin (n + 1) → k) → (Fin (n + 1) → k) → k := Classical.choose (nth_mul_coeff p k n) theorem nthRemainder_spec (n : ℕ) (x y : 𝕎 k) : (x * y).coeff (n + 1) = x.coeff (n + 1) * y.coeff 0 ^ p ^ (n + 1) + y.coeff (n + 1) * x.coeff 0 ^ p ^ (n + 1) + nthRem...
Mathlib/RingTheory/WittVector/MulCoeff.lean
279
288
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Abhimanyu Pallavi Sudhir, Jean Lo, Calle Sönne, Sébastien Gouëzel, Rémy Degenne, David Loeffler -/ import Mathlib.Analysis.SpecialFunctions.Pow.Complex import Qq /-! # P...
lemma rpow_ne_zero (hx : 0 ≤ x) (hy : y ≠ 0) : x ^ y ≠ 0 ↔ x ≠ 0 :=
Mathlib/Analysis/SpecialFunctions/Pow/Real.lean
73
73
/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Jeremy Avigad -/ import Mathlib.Logic.Basic import Mathlib.Logic.Function.Defs import Mathlib.Order.Defs.LinearOrder /-! # Booleans This file proves various...
lemma self_ne_not : ∀ b : Bool, b ≠ !b := by decide
Mathlib/Data/Bool/Basic.lean
125
125
/- Copyright (c) 2024 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rémy Degenne -/ import Mathlib.Data.Set.Finite.Lattice /-! # Partitions based on membership of a sequence of sets Let `f : ℕ → Set α` be a sequence of sets. For `n : ℕ`, we can form th...
@[simp] lemma sUnion_memPartition (f : ℕ → Set α) (n : ℕ) : ⋃₀ memPartition f n = univ := by induction n with | zero => simp | succ n ih => rw [memPartition_succ] ext x have : x ∈ ⋃₀ memPartition f n := by simp [ih] simp only [mem_sUnion, mem_iUnion, mem_insert_iff, mem_singleton_iff, exists_prop,...
Mathlib/Data/Set/MemPartition.lean
73
86
/- Copyright (c) 2020 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rémy Degenne -/ import Mathlib.Analysis.MeanInequalities import Mathlib.Analysis.MeanInequalitiesPow import Mathlib.MeasureTheory.Function.SpecialFunctions.Basic import Mathlib.MeasureTh...
refine lintegral_congr_ae ?_ suffices h_mul_zero : f * g =ᵐ[μ] 0 * g by rwa [zero_mul] at h_mul_zero have hf_eq_zero : f =ᵐ[μ] 0 := ae_eq_zero_of_lintegral_rpow_eq_zero hp0 hf hf_zero exact hf_eq_zero.mul (ae_eq_refl g) theorem lintegral_mul_le_Lp_mul_Lq_of_ne_zero_of_eq_top {p q : ℝ} (hp0_lt : 0 < p) (hq0 : 0...
Mathlib/MeasureTheory/Integral/MeanInequalities.lean
133
138
/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Jeremy Avigad -/ import Mathlib.Algebra.Group.Basic import Mathlib.Algebra.Notation.Pi import Mathlib.Data.Set.Lattice import Mathlib.Order.Filter.Defs /-! # Theory of...
Mathlib/Order/Filter/Basic.lean
1,664
1,666
/- Copyright (c) 2016 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Leonardo de Moura, Mario Carneiro, Johannes Hölzl -/ import Mathlib.Algebra.Order.Group.Defs import Mathlib.Algebra.Order.Group.Unbundled.Abs import Mathlib.Algebra.Order...
Mathlib/Algebra/Order/Group/Abs.lean
433
434
/- Copyright (c) 2021 Eric Wieser. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Eric Wieser, Frédéric Dupuis -/ import Mathlib.Algebra.Star.SelfAdjoint import Mathlib.Algebra.Module.Basic import Mathlib.Algebra.Module.Equiv.Defs import Mathlib.Algebra.Module.LinearMa...
theorem selfAdjointPart_comp_subtype_selfAdjoint : (selfAdjointPart R).comp (selfAdjoint.submodule R A).subtype = .id := LinearMap.ext fun x ↦ x.2.selfAdjointPart_apply R
Mathlib/Algebra/Star/Module.lean
169
171
/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Mario Carneiro -/ import Mathlib.Data.Set.Function import Mathlib.Logic.Equiv.Defs import Mathlib.Tactic.Says /-! # Equivalences and sets In this file we pr...
rfl @[simp]
Mathlib/Logic/Equiv/Set.lean
264
266
/- Copyright (c) 2022 Benjamin Davidson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Benjamin Davidson, Devon Tuma, Eric Rodriguez, Oliver Nash -/ import Mathlib.Algebra.Order.Group.Pointwise.Interval import Mathlib.Order.Filter.AtTopBot.Field import Mathlib.Topolog...
tendsto_inv_atTop_nhdsGT_zero.mono_right inf_le_left /-- The function `x ↦ x⁻¹` tends to `-∞` on the left of `0`. -/ theorem tendsto_inv_zero_atBot : Tendsto (fun x : 𝕜 => x⁻¹) (𝓝[<] (0 : 𝕜)) atBot := inv_nhdsLT_zero.le
Mathlib/Topology/Algebra/Order/Field.lean
165
169
/- Copyright (c) 2023 Jason Yuen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jason Yuen -/ import Mathlib.Data.Real.ConjExponents import Mathlib.Data.Real.Irrational /-! # Rayleigh's theorem on Beatty sequences This file proves Rayleigh's theorem on Beatty sequen...
`1/r + 1/s = 1`. Then `B⁺_r` and `B⁺_s` partition the positive integers. -/ theorem Irrational.beattySeq_symmDiff_beattySeq_pos {r s : ℝ} (hrs : r.HolderConjugate s) (hr : Irrational r) : {beattySeq r k | k > 0} ∆ {beattySeq s k | k > 0} = {n | 0 < n} := by
Mathlib/NumberTheory/Rayleigh.lean
172
175
/- Copyright (c) 2018 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau, Mario Carneiro -/ import Mathlib.Algebra.Module.Submodule.Bilinear import Mathlib.Algebra.Module.Equiv.Basic import Mathlib.GroupTheory.Congruence.Hom import Mathlib.Tactic.Abel ...
def lift.equiv : (M →ₗ[R] N →ₗ[R] P) ≃ₗ[R] M ⊗[R] N →ₗ[R] P := { uncurry R M N P with invFun := fun f => (mk R M N).compr₂ f left_inv := fun _ => LinearMap.ext₂ fun _ _ => lift.tmul _ _
Mathlib/LinearAlgebra/TensorProduct/Basic.lean
565
568
/- Copyright (c) 2020 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Algebra.Group.Pi.Lemmas import Mathlib.Algebra.GroupWithZero.Units.Equiv import Mathlib.Topology.Algebra.Monoid /-! # Topological group with zero I...
theorem continuousAt_zpow₀ (x : G₀) (m : ℤ) (h : x ≠ 0 ∨ 0 ≤ m) : ContinuousAt (fun x => x ^ m) x := by
Mathlib/Topology/Algebra/GroupWithZero.lean
314
315
/- Copyright (c) 2020 Kenny Lau. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kenny Lau, Ken Lee, Chris Hughes -/ import Mathlib.Algebra.BigOperators.Ring.Finset import Mathlib.Data.Fintype.Basic import Mathlib.Data.Int.GCD import Mathlib.RingTheory.Coprime.Basic /-...
Mathlib/RingTheory/Coprime/Lemmas.lean
306
309
/- Copyright (c) 2021 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Yury Kudryashov, Sébastien Gouëzel, Rémy Degenne -/ import Mathlib.MeasureTheory.Integral.FinMeasAdditive /-! # Extension of a linear function from indicators to L1 Give...
rw [← Integrable.toL1_sub] refine ((fs_int n).sub f_int).coeFn_toL1.mono fun x hx => ?_ dsimp only rw [hx, ofReal_norm_eq_enorm, Pi.sub_apply] /-- Lebesgue dominated convergence theorem for filters with a countable basis -/ theorem tendsto_setToFun_filter_of_dominated_convergence (hT : DominatedFinMeasAdditive...
Mathlib/MeasureTheory/Integral/SetToL1.lean
1,054
1,062
/- Copyright (c) 2017 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import Mathlib.Data.WSeq.Relation /-! # Parallel computation Parallel computation of a computable sequence of computations by a diagonal enumeration. The imp...
intro n; induction' n with n IH <;> intro l S c o T · rcases o with a | a · exact terminates_parallel.aux a T have H : Seq.destruct S = some (some c, Seq.tail S) := by simp [Seq.destruct, (· <$> ·), ← a] induction' h : parallel.aux2 l with a l' · have C : corec parallel.aux1 (l, S) = pure a := by ...
Mathlib/Data/Seq/Parallel.lean
122
186
/- Copyright (c) 2020 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Analysis.SpecialFunctions.Pow.NNReal import Mathlib.Analysis.SpecialFunctions.Pow.Continuity import Mathlib.Analysis.SumOverResidueClass /-! # Conve...
(hu : Monotone u) (n : ℕ) : (∑ k ∈ Ico (u 0) (u n), f k) ≤ ∑ k ∈ range n, (u (k + 1) - u k) • f (u k) := by induction n with | zero => simp | succ n ihn => suffices (∑ k ∈ Ico (u n) (u (n + 1)), f k) ≤ (u (n + 1) - u n) • f (u n) by rw [sum_range_succ, ← sum_Ico_consecutive] · exact add_le...
Mathlib/Analysis/PSeries.lean
50
62
/- Copyright (c) 2020 Fox Thomson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Fox Thomson -/ import Mathlib.Algebra.Order.Group.Defs import Mathlib.SetTheory.Game.Basic import Mathlib.Tactic.NthRewrite /-! # Basic definitions about impartial (pre-)games We will d...
⟨(equiv_or_fuzzy_zero G).resolve_right, Equiv.not_fuzzy⟩ theorem add_self : G + G ≈ 0 := Equiv.trans (add_congr_left (neg_equiv_self G)) (neg_add_cancel_equiv G)
Mathlib/SetTheory/Game/Impartial.lean
130
133
/- Copyright (c) 2014 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Andrew Zipperer, Haitao Zhang, Minchao Wu, Yury Kudryashov -/ import Mathlib.Data.Set.Prod import Mathlib.Data.Set.Restrict /-! # Functions over sets This file contains...
⟨h.1.extendDomain, h.2.extendDomain⟩ end Set
Mathlib/Data/Set/Function.lean
1,192
1,195
/- Copyright (c) 2022 Yaël Dillies, Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies, Bhavik Mehta -/ import Mathlib.Combinatorics.SimpleGraph.Path import Mathlib.Combinatorics.SimpleGraph.Operations import Mathlib.Data.Finset.Pairwise import M...
theorem isNClique_zero : G.IsNClique 0 s ↔ s = ∅ := by simp only [isNClique_iff, Finset.card_eq_zero, and_iff_right_iff_imp]; rintro rfl; simp
Mathlib/Combinatorics/SimpleGraph/Clique.lean
235
236
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Johannes Hölzl, Kim Morrison, Jens Wagemaker -/ import Mathlib.Algebra.MonoidAlgebra.Degree import Mathlib.Algebra.Order.Ring.WithTop import Mathlib.Algebra.Polynomial.Basi...
Mathlib/Algebra/Polynomial/Degree/Definitions.lean
821
828
/- Copyright (c) 2022 Kexing Ying. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kexing Ying, Rémy Degenne -/ import Mathlib.Probability.Process.Stopping import Mathlib.Tactic.AdaptationNote /-! # Hitting time Given a stochastic process, the hitting time provides th...
theorem hitting_of_lt {m : ι} (h : m < n) : hitting u s n m ω = m := by simp_rw [hitting] have h_not : ¬∃ (j : ι) (_ : j ∈ Set.Icc n m), u j ω ∈ s := by push_neg intro j rw [Set.Icc_eq_empty_of_lt h] simp only [Set.mem_empty_iff_false, IsEmpty.forall_iff] simp only [exists_prop] at h_not simp on...
Mathlib/Probability/Process/HittingTime.lean
67
75
/- Copyright (c) 2020 Kevin Kappelmann. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Kappelmann -/ import Mathlib.Algebra.ContinuedFractions.Determinant import Mathlib.Algebra.ContinuedFractions.Computation.CorrectnessTerminating import Mathlib.Algebra.Order.Ri...
GenContFract.contsAux_recurrence nth_s_eq rfl rfl] /-- Shows that `bₙ * Bₙ ≤ Bₙ₊₁`, where `bₙ` is the `n`th partial denominator and `Bₙ₊₁` and `Bₙ` are the `n + 1`th and `n`th denominator of the continued fraction. -/ theorem le_of_succ_get?_den {b : K}
Mathlib/Algebra/ContinuedFractions/Computation/Approximations.lean
286
290
/- Copyright (c) 2022 Heather Macbeth. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Heather Macbeth, Floris van Doorn -/ import Mathlib.Topology.VectorBundle.Basic /-! # The vector bundle of continuous (semi)linear maps We define the (topological) vector bundle of ...
/-- The continuous `σ`-semilinear maps between two topological vector bundles form a `VectorPrebundle` (this is an auxiliary construction for the `VectorBundle` instance, in which the pretrivializations are collated but no topology on the total space is yet provided). -/ def Bundle.ContinuousLinearMap.vectorPrebundle ...
Mathlib/Topology/VectorBundle/Hom.lean
186
198
/- Copyright (c) 2019 Minchao Wu. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Minchao Wu, Chris Hughes, Mantas Bakšys -/ import Mathlib.Data.List.Basic import Mathlib.Order.BoundedOrder.Lattice import Mathlib.Data.List.Induction import Mathlib.Order.MinMax import Ma...
theorem not_of_mem_foldl_argAux (hr₀ : Irreflexive r) (hr₁ : Transitive r) : ∀ {a m : α} {o : Option α}, a ∈ l → m ∈ foldl (argAux r) o l → ¬r a m := by induction' l using List.reverseRecOn with tl a ih · simp intro b m o hb ho rw [foldl_append, foldl_cons, foldl_nil, argAux] at ho rcases hf : foldl (arg...
Mathlib/Data/List/MinMax.lean
69
86
/- Copyright (c) 2022 Joël Riou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joël Riou -/ import Mathlib.AlgebraicTopology.DoldKan.Projections import Mathlib.CategoryTheory.Idempotents.FunctorCategories import Mathlib.CategoryTheory.Idempotents.FunctorExtension /-!...
/-- The endomorphism `PInfty : K[X] ⟶ K[X]` obtained from the `P q` by passing to the limit. -/ noncomputable def PInfty : K[X] ⟶ K[X] :=
Mathlib/AlgebraicTopology/DoldKan/PInfty.lean
46
48
/- Copyright (c) 2020 Alexander Bentkamp. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alexander Bentkamp -/ import Mathlib.Algebra.Algebra.Spectrum.Basic import Mathlib.Algebra.Module.LinearMap.Basic import Mathlib.LinearAlgebra.FiniteDimensional.Lemmas import Mathl...
genEigenspace_div f a b hb @[deprecated genEigenspace_nat (since := "2024-10-28")] lemma genEigenspace_def (f : End R M) (μ : R) (k : ℕ) : f.genEigenspace μ k = LinearMap.ker ((f - μ • 1) ^ k) := genEigenspace_nat /-- A nonzero element of a generalized eigenspace is a generalized eigenvector. (Def 8.9 of [axl...
Mathlib/LinearAlgebra/Eigenspace/Basic.lean
469
484
/- Copyright (c) 2022 Michael Stoll. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Michael Stoll -/ import Mathlib.NumberTheory.LegendreSymbol.QuadraticChar.Basic import Mathlib.NumberTheory.GaussSum /-! # Quadratic characters of finite fields Further facts relying ...
simp only [FiniteField.isSquare_of_char_two hF, true_iff] omega · have h := FiniteField.odd_card_of_char_ne_two hF rw [← quadraticChar_one_iff_isSquare (neg_ne_zero.mpr (Ring.two_ne_zero hF)), quadraticChar_neg_two hF, χ₈'_nat_eq_if_mod_eight] omega /-- The relation between the values of the qu...
Mathlib/NumberTheory/LegendreSymbol/QuadraticChar/GaussSum.lean
63
73
/- Copyright (c) 2019 Reid Barton. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import Mathlib.Topology.Constructions /-! # Neighborhoods and continuity relative to a subset This file develops API on the relative versions * `nhdsWithin` ...
{f : α → ∀ i, π i} {s : Set α} : ContinuousOn f s ↔ ∀ i, ContinuousOn (fun y => f y i) s := ⟨fun h i x hx => tendsto_pi_nhds.1 (h x hx) i, fun h x hx => tendsto_pi_nhds.2 fun i => h i x hx⟩
Mathlib/Topology/ContinuousOn.lean
1,174
1,176
/- Copyright (c) 2018 Patrick Massot. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Patrick Massot, Johannes Hölzl -/ import Mathlib.Algebra.Field.Subfield.Defs import Mathlib.Algebra.Order.Group.Pointwise.Interval import Mathlib.Analysis.Normed.Ring.Basic /-! # Norm...
Mathlib/Analysis/Normed/Field/Basic.lean
1,106
1,107
/- Copyright (c) 2019 Jean Lo. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jean Lo, Yaël Dillies, Moritz Doll -/ import Mathlib.Algebra.Order.Pi import Mathlib.Analysis.Convex.Function import Mathlib.Analysis.LocallyConvex.Basic import Mathlib.Data.Real.Pointwise /...
theorem ball_norm_mul_subset {p : Seminorm 𝕜 E} {k : 𝕜} {r : ℝ} : p.ball 0 (‖k‖ * r) ⊆ k • p.ball 0 r := by rcases eq_or_ne k 0 with (rfl | hk) · rw [norm_zero, zero_mul, ball_eq_emptyset _ le_rfl] exact empty_subset _
Mathlib/Analysis/Seminorm.lean
890
894
/- Copyright (c) 2022 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rémy Degenne, Kexing Ying -/ import Mathlib.MeasureTheory.Function.ConditionalExpectation.Indicator import Mathlib.MeasureTheory.Function.UniformIntegrable import Mathlib.MeasureTheory.V...
@[deprecated (since := "2025-01-21")] alias condexp_stronglyMeasurable_mul_of_bound₀ := condExp_stronglyMeasurable_mul_of_bound₀ /-- Pull-out property of the conditional expectation. -/ theorem condExp_mul_of_stronglyMeasurable_left {f g : α → ℝ} (hf : StronglyMeasurable[m] f) (hfg : Integrable (f * g) μ) (hg : In...
Mathlib/MeasureTheory/Function/ConditionalExpectation/Real.lean
317
351
/- Copyright (c) 2021 Praneeth Kolichala. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Praneeth Kolichala -/ import Mathlib.Topology.Constructions import Mathlib.Topology.Homotopy.Path /-! # Product of homotopies In this file, we introduce definitions for the produ...
Quotient.map₂ Path.prod (fun _ _ h₁ _ _ h₂ => Nonempty.map2 prodHomotopy h₁ h₂) q₁ q₂ variable (p₁ p₁' p₂ p₂') theorem prod_lift : prod ⟦p₁⟧ ⟦p₂⟧ = ⟦p₁.prod p₂⟧ := rfl
Mathlib/Topology/Homotopy/Product.lean
168
173
/- Copyright (c) 2016 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Mario Carneiro -/ import Mathlib.Data.Set.Defs import Mathlib.Logic.Basic import Mathlib.Logic.ExistsUnique import Mathlib.Logic.Nonempty import Mathlib.Logic.Nontrivia...
protected theorem Bijective.surjective {f : α → β} (hf : Bijective f) : Surjective f := hf.2 theorem not_injective_iff : ¬ Injective f ↔ ∃ a b, f a = f b ∧ a ≠ b := by simp only [Injective, not_forall, exists_prop]
Mathlib/Logic/Function/Basic.lean
74
78
/- Copyright (c) 2019 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import Mathlib.Analysis.SpecificLimits.Basic import Mathlib.Topology.MetricSpace.IsometricSMul /-! # Hausdorff distance The Hausdorff distance on subsets of a...
theorem infEdist_le_edist_add_infEdist : infEdist x s ≤ edist x y + infEdist y s := by rw [add_comm]
Mathlib/Topology/MetricSpace/HausdorffDistance.lean
120
121
/- Copyright (c) 2021 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kim Morrison, Riccardo Brasca, Adam Topaz, Jujian Zhang, Joël Riou -/ import Mathlib.Algebra.Homology.Additive import Mathlib.CategoryTheory.Abelian.Projective.Resolution /-! # Left-der...
(F : C ⥤ D) [F.Additive] (n : ℕ) : (F.leftDerived n).map f ≫ (Q.isoLeftDerivedObj F n).hom = (P.isoLeftDerivedObj F n).hom ≫ (F.mapHomologicalComplex _ ⋙ HomologicalComplex.homologyFunctor _ _ n).map φ := by dsimp [isoLeftDerivedObj, Functor.leftDerived] rw [assoc, ← Functor.map_comp_assoc, ...
Mathlib/CategoryTheory/Abelian/LeftDerived.lean
119
132
/- Copyright (c) 2019 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import Mathlib.Analysis.Convex.Topology import Mathlib.Analysis.Normed.Module.Basic import Mathlib.Analysis.Seminorm import Mathlib.Analysis.SpecificLimits.Basi...
end TVS
Mathlib/Analysis/Calculus/TangentCone.lean
435
436
/- Copyright (c) 2020 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Bhavik Mehta, Kim Morrison -/ import Mathlib.CategoryTheory.Functor.Currying import Mathlib.CategoryTheory.Subobject.FactorThru import Mathlib.CategoryTheory.Subobject.WellPowered import...
simp only [Finset.sup_insert] simp only [Finset.mem_insert] at m rcases m with (rfl | m) · exact sup_factors_of_factors_left h · exact sup_factors_of_factors_right (ih ⟨j, ⟨m, h⟩⟩) end SemilatticeSup section Lattice
Mathlib/CategoryTheory/Subobject/Lattice.lean
486
494
/- Copyright (c) 2019 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Johan Commelin -/ import Mathlib.RingTheory.IntegralClosure.IsIntegral.Basic /-! # Minimal polynomials This file defines the minimal polynomial of an element `x` of an `A...
rw [dif_pos hx] exact (degree_lt_wf.min_mem _ hx).1 /-- A minimal polynomial is nonzero. -/
Mathlib/FieldTheory/Minpoly/Basic.lean
52
55
/- Copyright (c) 2014 Parikshit Khanna. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Parikshit Khanna, Jeremy Avigad, Leonardo de Moura, Floris van Doorn, Mario Carneiro -/ import Mathlib.Control.Basic import Mathlib.Data.Nat.Basic import Mathlib.Data.Option.Basic im...
Mathlib/Data/List/Basic.lean
3,523
3,528
/- Copyright (c) 2020 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Analysis.Convex.Function import Mathlib.Analysis.Convex.StrictConvexSpace import Mathlib.MeasureTheory.Function.AEEqOfIntegral import Mathlib.Measure...
have : ∀ {t}, μ t ≠ 0 → (⨍ x in t, f x ∂μ) ∈ s ∧ g (⨍ x in t, f x ∂μ) ≤ ⨍ x in t, g (f x) ∂μ := fun ht => hg.convexOn.set_average_mem_epigraph hgc hsc ht (measure_ne_top _ _) (ae_restrict_of_ae hfs) hfi.integrableOn hgi.integrableOn refine (ae_eq_const_or_exists_average_ne_compl hfi).imp_right ?_ ri...
Mathlib/Analysis/Convex/Integral.lean
271
280
/- Copyright (c) 2022 Joël Riou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joël Riou -/ import Mathlib.AlgebraicTopology.DoldKan.FunctorGamma import Mathlib.AlgebraicTopology.DoldKan.SplitSimplicialObject import Mathlib.CategoryTheory.Idempotents.HomologicalComple...
@[simp] theorem N₁Γ₀_hom_app_f_f (K : ChainComplex C ℕ) (n : ℕ) : (N₁Γ₀.hom.app K).f.f n = (Γ₀.splitting K).toKaroubiNondegComplexIsoN₁.inv.f.f n := by rw [N₁Γ₀_hom_app] apply comp_id
Mathlib/AlgebraicTopology/DoldKan/GammaCompN.lean
95
100
/- Copyright (c) 2019 Zhouhang Zhou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Sébastien Gouëzel, Frédéric Dupuis -/ import Mathlib.Algebra.BigOperators.Field import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.InnerProductSpace.Defs impor...
theorem dist_div_norm_sq_smul {x y : F} (hx : x ≠ 0) (hy : y ≠ 0) (R : ℝ) :
Mathlib/Analysis/InnerProductSpace/Basic.lean
616
616
/- Copyright (c) 2015, 2017 Jeremy Avigad. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jeremy Avigad, Robert Y. Lewis, Johannes Hölzl, Mario Carneiro, Sébastien Gouëzel -/ import Mathlib.Algebra.Order.BigOperators.Group.Finset import Mathlib.Order.Interval.Finset.Na...
Mathlib/Topology/EMetricSpace/Basic.lean
881
888
/- Copyright (c) 2014 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Leonardo de Moura, Jeremy Avigad -/ import Mathlib.Logic.Basic import Mathlib.Logic.Function.Defs import Mathlib.Order.Defs.LinearOrder /-! # Booleans This file proves various...
Mathlib/Data/Bool/Basic.lean
247
247
/- Copyright (c) 2024 David Loeffler. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: David Loeffler -/ import Mathlib.NumberTheory.LSeries.AbstractFuncEq import Mathlib.NumberTheory.ModularForms.JacobiTheta.Bounds import Mathlib.Analysis.SpecialFunctions.Gamma.Deligne ...
Tendsto (fun s ↦ (s - 1) * completedHurwitzZetaEven a s) (𝓝[≠] 1) (𝓝 1) := by have h1 : Tendsto (fun s : ℂ ↦ (s - ↑(1 / 2 : ℝ)) * _) (𝓝[≠] ↑(1 / 2 : ℝ)) (𝓝 ((1 : ℂ) * (1 : ℂ))) := (hurwitzEvenFEPair a).Λ_residue_k simp only [push_cast, one_mul] at h1 refine (h1.comp <| tendsto_div_two_punctured_nhds...
Mathlib/NumberTheory/LSeries/HurwitzZetaEven.lean
452
461
/- Copyright (c) 2017 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Yakov Pechersky, Eric Wieser -/ import Mathlib.Data.List.Basic /-! # Properties of `List.enum` ## Deprecation note Many lemmas in this file have been replaced by the...
Mathlib/Data/List/Enum.lean
57
59
/- Copyright (c) 2023 Joël Riou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Joël Riou -/ import Mathlib.CategoryTheory.Shift.Adjunction import Mathlib.CategoryTheory.Preadditive.Opposite /-! # The (naive) shift on the opposite category If `C` is a category equipp...
def OppositeShift (A : Type*) [AddMonoid A] [HasShift C A] := Cᵒᵖ instance : Category (OppositeShift C A) := by dsimp only [OppositeShift] infer_instance noncomputable instance : HasShift (OppositeShift C A) A :=
Mathlib/CategoryTheory/Shift/Opposite.lean
78
84
/- Copyright (c) 2021 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Algebra.Order.Ring.Defs import Mathlib.Algebra.Ring.Invertible import Mathlib.Data.Nat.Cast.Order.Ring /-! # Lemmas about `invOf` in ordered (semi)r...
⟨fun h => pos_of_mul_pos_left this h.le, fun h => pos_of_mul_pos_right this h.le⟩ @[simp]
Mathlib/Algebra/Order/Invertible.lean
19
21
/- Copyright (c) 2019 Zhouhang Zhou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Yury Kudryashov, Patrick Massot -/ import Mathlib.MeasureTheory.Integral.IntervalIntegral.Basic import Mathlib.MeasureTheory.Measure.Real import Mathlib.Order.Filter.Indi...
simp only [integral_symm b] exact (continuousOn_primitive_interval h_int).neg theorem continuous_primitive (h_int : ∀ a b, IntervalIntegrable f μ a b) (a : ℝ) : Continuous fun b => ∫ x in a..b, f x ∂μ := by
Mathlib/MeasureTheory/Integral/DominatedConvergence.lean
499
503
/- Copyright (c) 2020 Aaron Anderson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Aaron Anderson -/ import Mathlib.Algebra.BigOperators.Ring.Finset import Mathlib.Algebra.Module.BigOperators import Mathlib.NumberTheory.Divisors import Mathlib.Data.Nat.Squarefree imp...
simp [y2ne] mul_assoc := mul_smul' } instance instSemiring : Semiring (ArithmeticFunction R) := { ArithmeticFunction.instAddMonoidWithOne, ArithmeticFunction.instMonoid, ArithmeticFunction.instAddCommMonoid with zero_mul := fun f => by ext simp mul_zero := fun f => by ext ...
Mathlib/NumberTheory/ArithmeticFunction.lean
325
344
/- Copyright (c) 2022 Anatole Dedecker. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anatole Dedecker -/ import Mathlib.Topology.UniformSpace.UniformConvergenceTopology /-! # Equicontinuity of a family of functions Let `X` be a topological space and `α` a `UniformS...
have := (UniformFun.postcomp_isUniformInducing (α := ι) hu).isInducing rw [equicontinuousAt_iff_continuousAt, equicontinuousAt_iff_continuousAt, this.continuousAt_iff] rfl /-- Given `u : α → β` a uniform inducing map, a family `𝓕 : ι → X → α` is equicontinuous at a point `x₀ : X` within a subset `S : Set X` iff...
Mathlib/Topology/UniformSpace/Equicontinuity.lean
709
715
/- Copyright (c) 2020 Sébastien Gouëzel. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Sébastien Gouëzel -/ import Mathlib.Algebra.BigOperators.Group.Finset.Powerset import Mathlib.Algebra.NoZeroSMulDivisors.Pi import Mathlib.Data.Finset.Sort import Mathlib.Data.Finty...
/-- The map is always nonempty. This lemma is needed to apply `SubMulAction.zero_mem`. -/ theorem map_nonempty [Nonempty ι] (f : MultilinearMap R M₁ M₂) (p : ∀ i, Submodule R (M₁ i)) : (map f p : Set M₂).Nonempty := ⟨f 0, 0, fun i => (p i).zero_mem, rfl⟩ /-- The range of a multilinear map, closed under scalar mu...
Mathlib/LinearAlgebra/Multilinear/Basic.lean
1,390
1,398
/- Copyright (c) 2023 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Rémy Degenne -/ import Mathlib.Probability.ConditionalProbability import Mathlib.Probability.Kernel.Basic import Mathlib.Probability.Kernel.Composition.MeasureComp import Mathlib.Tactic....
have hπS_pi : IsPiSystem πS := by exact IsPiSystem.comap (@isPiSystem_pi _ _ ?_) _ have hπS_gen : (MeasurableSpace.pi.comap fun a (i : S) => f i a) = generateFrom πS := by rw [generateFrom_pi.symm, comap_generateFrom] congr let πTβ := Set.pi (Set.univ : Set T) '' Set.pi (Set.univ : Set T) fun i => {...
Mathlib/Probability/Independence/Kernel.lean
1,038
1,057
/- Copyright (c) 2020 Johan Commelin. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johan Commelin -/ import Mathlib.Algebra.CharP.Reduced import Mathlib.RingTheory.IntegralDomain -- TODO: remove Mathlib.Algebra.CharP.Reduced and move the last two lemmas to Lemmas /-...
Mathlib/RingTheory/RootsOfUnity/Basic.lean
528
535
/- Copyright (c) 2022 Heather Macbeth. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Heather Macbeth -/ import Mathlib.Order.ConditionallyCompleteLattice.Basic import Mathlib.Order.LatticeIntervals import Mathlib.Order.Interval.Set.OrdConnected /-! # Subtypes of cond...
· simp
Mathlib/Order/CompleteLatticeIntervals.lean
266
266
/- Copyright (c) 2020 Kevin Buzzard, Bhavik Mehta. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kevin Buzzard, Bhavik Mehta -/ import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Equalizers import Mathlib.CategoryTheory.Limits.Preserves.Shapes.Products import Mathl...
erw [(homEquivAmalgamation (eqv π).2).uniqueCongr.nonempty_congr] rw [unique_subtype_iff_existsUnique] exact h _ _ (eqv π).2 /-- Given sieve `S` and presheaf `P : Cᵒᵖ ⥤ A`, their natural associated cone admits at most one morphism from every cone in the same category (i.e. over the same diagram), i...
Mathlib/CategoryTheory/Sites/Sheaf.lean
149
164
/- Copyright (c) 2019 Anne Baanen. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anne Baanen -/ import Mathlib.Algebra.Regular.Basic import Mathlib.GroupTheory.MonoidLocalization.Basic import Mathlib.LinearAlgebra.Matrix.MvPolynomial import Mathlib.LinearAlgebra.Matri...
AlgHom.mapMatrix_apply, AlgHom.mapMatrix_apply, Matrix.map_smul' _ _ _ (map_mul _)] have h_card' : Fintype.card n - 2 + 1 = Fintype.card n - 1 := by simp [h_card] have is_reg : IsSMulRegular (MvPolynomial (n × n) ℤ) (det A') := fun x y => mul_left_cancel₀ (det_mvPolynomialX_ne_zero n ℤ) apply is_reg.mat...
Mathlib/LinearAlgebra/Matrix/Adjugate.lean
496
516
/- Copyright (c) 2017 Robert Y. Lewis. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Robert Y. Lewis, Keeley Hoek -/ import Mathlib.Algebra.NeZero import Mathlib.Data.Int.DivMod import Mathlib.Logic.Embedding.Basic import Mathlib.Logic.Equiv.Set import Mathlib.Tactic....
@[simp] lemma succAbove_ne_zero_zero [NeZero n] {a : Fin (n + 1)} (ha : a ≠ 0) : a.succAbove 0 = 0 := by rw [Fin.succAbove_of_castSucc_lt] · exact castSucc_zero'
Mathlib/Data/Fin/Basic.lean
1,023
1,026
/- Copyright (c) 2023 Peter Nelson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Peter Nelson -/ import Mathlib.Data.Finite.Prod import Mathlib.Data.Matroid.Init import Mathlib.Data.Set.Card import Mathlib.Data.Set.Finite.Powerset import Mathlib.Order.UpperLower.Clos...
theorem isBase_iff_maximal_indep : M.IsBase B ↔ Maximal M.Indep B := by rw [maximal_subset_iff]
Mathlib/Data/Matroid/Basic.lean
611
613
/- Copyright (c) 2019 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov, Sébastien Gouëzel, Rémy Degenne -/ import Mathlib.Algebra.BigOperators.Expect import Mathlib.Algebra.BigOperators.Field import Mathlib.Analysis.Convex.Jensen import M...
variable {f g} /-- **Hölder inequality**: the scalar product of two functions is bounded by the product of their `L^p` and `L^q` norms when `p` and `q` are conjugate exponents. Version for sums over finite sets, with real-valued nonnegative functions. -/ theorem inner_le_Lp_mul_Lq_of_nonneg (hpq : HolderConjugate p q)...
Mathlib/Analysis/MeanInequalities.lean
737
750
/- Copyright (c) 2022 Xavier Roblot. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Alex J. Best, Xavier Roblot -/ import Mathlib.Algebra.Algebra.Hom.Rat import Mathlib.Analysis.Complex.Polynomial.Basic import Mathlib.NumberTheory.NumberField.Norm import Mathlib.RingTh...
lemma IsUnramifiedAtInfinitePlaces.bot [h₁ : IsUnramifiedAtInfinitePlaces k F] [Algebra.IsAlgebraic K F] : IsUnramifiedAtInfinitePlaces k K where isUnramified w := by obtain ⟨w, rfl⟩ := InfinitePlace.comap_surjective (K := F) w exact (h₁.1 w).comap K variable {K} lemma NumberField.InfinitePlace.isU...
Mathlib/NumberTheory/NumberField/Embeddings.lean
1,074
1,094
/- Copyright (c) 2023 Mohanad Ahmed. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mohanad Ahmed -/ import Mathlib.Algebra.Polynomial.Basic import Mathlib.FieldTheory.IsAlgClosed.Basic /-! # Eigenvalues are characteristic polynomial roots. In fields we show that: *...
rw [det_eq_sign_charpoly_coeff, ← charpoly_natDegree_eq_dim A, Polynomial.prod_roots_eq_coeff_zero_of_monic_of_splits A.charpoly_monic hAps, ← mul_assoc, ← pow_two, pow_right_comm, neg_one_sq, one_pow, one_mul] theorem trace_eq_sum_roots_charpoly_of_splits (hAps : A.charpoly.Splits (RingHom.id R)) :
Mathlib/LinearAlgebra/Matrix/Charpoly/Eigs.lean
60
64
/- Copyright (c) 2017 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Floris van Doorn, Violeta Hernández Palacios -/ import Mathlib.SetTheory.Ordinal.Family /-! # Ordinal exponential In this file we define the power function and the lo...
theorem lt_opow_succ_log_self {b : Ordinal} (hb : 1 < b) (x : Ordinal) : x < b ^ succ (log b x) := by rcases eq_or_ne x 0 with (rfl | hx) · apply opow_pos _ (zero_lt_one.trans hb) · rw [succ_log_def hb hx] exact csInf_mem (log_nonempty hb)
Mathlib/SetTheory/Ordinal/Exponential.lean
311
316
/- Copyright (c) 2022 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kim Morrison, Jireh Loreaux -/ import Mathlib.Algebra.Algebra.Subalgebra.Lattice import Mathlib.Algebra.Algebra.Tower import Mathlib.Algebra.Star.Module import Mathlib.Algebra.Star.NonUn...
rfl
Mathlib/Algebra/Star/Subalgebra.lean
652
652
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Johannes Hölzl, Kim Morrison, Jens Wagemaker, Johan Commelin -/ import Mathlib.Algebra.Polynomial.BigOperators import Mathlib.Algebra.Polynomial.RingDivision import Mathlib...
@[simp] theorem roots_pow (p : R[X]) (n : ℕ) : (p ^ n).roots = n • p.roots := by induction n with | zero => rw [pow_zero, roots_one, zero_smul, empty_eq_zero] | succ n ihn => rcases eq_or_ne p 0 with (rfl | hp)
Mathlib/Algebra/Polynomial/Roots.lean
228
233
/- Copyright (c) 2022 Jake Levinson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Jake Levinson -/ import Mathlib.Data.Finset.Preimage import Mathlib.Data.Finset.Prod import Mathlib.Data.SetLike.Basic import Mathlib.Order.UpperLower.Basic /-! # Young diagrams A You...
1. `YoungDiagram.rowLens_sorted` : It is weakly decreasing (`List.Sorted (· ≥ ·)`).
Mathlib/Combinatorics/Young/YoungDiagram.lean
351
351
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes -/ import Mathlib.Data.Finite.Sum import Mathlib.GroupTheory.OrderOfElement import Mathlib.GroupTheory.Perm.Support import Mathlib.Logic.Equiv.Fintype /-! # Permutations on...
Finset.surj_on_of_inj_on_of_card_le (fun x hx => (fun i _ => f i) x hx) (fun a ha => h a ha) (fun a₁ a₂ ha₁ ha₂ heq => (Equiv.apply_eq_iff_eq f).mp heq) rfl.ge obtain ⟨y2, hy2, heq⟩ := h0 y hy convert hy2 rw [heq] simp only [inv_apply_self] theorem perm_inv_mapsTo_of_mapsTo (f : Perm α) {s : Set α} [...
Mathlib/GroupTheory/Perm/Finite.lean
57
65
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Abhimanyu Pallavi Sudhir, Jean Lo, Calle Sönne, Benjamin Davidson -/ import Mathlib.Analysis.SpecialFunctions.Trigonometric.Angle import Mathlib.Analysis.SpecialFunctions.T...
theorem arg_mul_cos_add_sin_mul_I_eq_toIocMod {r : ℝ} (hr : 0 < r) (θ : ℝ) : arg (r * (cos θ + sin θ * I)) = toIocMod Real.two_pi_pos (-π) θ := by have hi : toIocMod Real.two_pi_pos (-π) θ ∈ Set.Ioc (-π) π := by
Mathlib/Analysis/SpecialFunctions/Complex/Arg.lean
448
450
/- Copyright (c) 2023 Andrew Yang. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Andrew Yang -/ import Mathlib.FieldTheory.Minpoly.IsIntegrallyClosed import Mathlib.FieldTheory.PrimitiveElement import Mathlib.FieldTheory.IsAlgClosed.Basic /-! # Results about `minpoly...
rw [e, zero_mul] at this exact ((minpoly.monic hx).map (algebraMap R S)).ne_zero this.symm lemma minpolyDiv_monic : Monic (minpolyDiv R x) := by
Mathlib/FieldTheory/Minpoly/MinpolyDiv.lean
105
108
/- Copyright (c) 2018 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kim Morrison, Markus Himmel -/ import Mathlib.CategoryTheory.EpiMono import Mathlib.CategoryTheory.Limits.HasLimits /-! # Equalizers and coequalizers This file defines (co)equalizers a...
theorem hasCoequalizer_epi_comp [HasCoequalizer f g] {W : C} (h : W ⟶ X) [Epi h] : HasCoequalizer (h ≫ f) (h ≫ g) := ⟨⟨{ cocone := _ isColimit := isCoequalizerEpiComp (colimit.isColimit _) h }⟩⟩ variable (C f g)
Mathlib/CategoryTheory/Limits/Shapes/Equalizers.lean
1,168
1,173
/- Copyright (c) 2024 Xavier Roblot. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Xavier Roblot -/ import Mathlib.RingTheory.FractionalIdeal.Basic import Mathlib.RingTheory.Ideal.Norm.AbsNorm import Mathlib.RingTheory.Localization.NormTrace /-! # Fractional ideal n...
absNorm (spanSingleton R⁰ x) = |(Algebra.norm ℚ x)| := by have : IsDomain K := IsFractionRing.isDomain R obtain ⟨d, ⟨r, hr⟩⟩ := IsLocalization.exists_integer_multiple R⁰ x rw [absNorm_eq' d (Ideal.span {r})] · rw [Ideal.absNorm_span_singleton] simp_rw [Int.cast_natAbs, Int.cast_abs, show ((Algebra.norm ...
Mathlib/RingTheory/FractionalIdeal/Norm.lean
132
147
/- Copyright (c) 2021 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Analysis.BoxIntegral.Box.Basic import Mathlib.Analysis.SpecificLimits.Basic /-! # Induction on subboxes In this file we prove the following inducti...
refine forall_congr' fun i ↦ ?_ dsimp only [Set.piecewise] split_ifs with hs <;> simp only [hs, iff_true, iff_false, not_lt] exacts [⟨fun H ↦ ⟨⟨(left_lt_add_div_two.2 (I.lower_lt_upper i)).trans H.1, H.2⟩, H.1⟩, fun H ↦ ⟨H.2, H.1.2⟩⟩, ⟨fun H ↦ ⟨⟨H.1, H.2.trans (add_div_two_lt_right.2 (I.lower_lt_upper...
Mathlib/Analysis/BoxIntegral/Box/SubboxInduction.lean
53
62
/- Copyright (c) 2021 Damiano Testa. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Damiano Testa -/ import Mathlib.Algebra.Group.Basic import Mathlib.Order.Basic import Mathlib.Order.Monotone.Defs /-! # Covariants and contravariants This file contains general lemma...
/-- Typeclass for monotonicity of addition on the left, namely `b₁ < b₂ → a + b₁ < a + b₂`. You should usually not use this very granular typeclass directly, but rather a typeclass like `OrderedAddCommGroup`. -/ abbrev AddLeftStrictMono [Add M] [LT M] : Prop := CovariantClass M M (· + ·) (· < ·)
Mathlib/Algebra/Order/Monoid/Unbundled/Defs.lean
170
176
/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Yaël Dillies -/ import Mathlib.Data.Set.Image /-! # Directed indexed families and sets This file defines directed indexed families and directed sets. An indexed famil...
theorem IsTotal.directed [IsTotal α r] (f : ι → α) : Directed r f := fun i j => Or.casesOn (total_of r (f i) (f j)) (fun h => ⟨j, h, refl _⟩) fun h => ⟨i, refl _, h⟩ /-- `IsDirected α r` states that for any elements `a`, `b` there exists an element `c` such that `r a c` and `r b c`. -/ class IsDirected (α : Type*) ...
Mathlib/Order/Directed.lean
116
128
/- Copyright (c) 2021 Riccardo Brasca. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Riccardo Brasca -/ import Mathlib.RingTheory.IntegralClosure.IntegrallyClosed import Mathlib.RingTheory.Trace.Basic import Mathlib.RingTheory.Norm.Basic /-! # Discriminant of a famil...
(hli : ¬LinearIndependent A b) : discr A b = 0 := by classical
Mathlib/RingTheory/Discriminant.lean
88
89
/- Copyright (c) 2022 Yaël Dillies. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yaël Dillies -/ import Mathlib.Algebra.Order.Ring.Canonical import Mathlib.Algebra.Order.Ring.Nat import Mathlib.Combinatorics.SetFamily.Compression.Down import Mathlib.Data.Fintype.Powe...
| empty => simp_rw [subset_empty, ← subset_singleton_iff', subset_singleton_iff] at h𝒜s hℬs obtain rfl | rfl := h𝒜s · simp only [card_empty, zero_mul, empty_inter, mul_zero, le_refl] obtain rfl | rfl := hℬs · simp only [card_empty, inter_empty, mul_zero, zero_mul, le_refl] · simp only [card_...
Mathlib/Combinatorics/SetFamily/HarrisKleitman.lean
55
91
/- Copyright (c) 2020 Floris van Doorn. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Floris van Doorn -/ import Mathlib.MeasureTheory.Measure.Content import Mathlib.MeasureTheory.Group.Prod import Mathlib.Topology.Algebra.Group.Compact /-! # Haar measure In this fi...
· rw [h2U.interior_eq]; exact ⟨1, h3U⟩ · refine disjoint_of_subset ?_ ?_ hU · refine Subset.trans (mul_subset_mul Subset.rfl ?_) h2L₁ exact Subset.trans (inv_subset.mpr h1U) inter_subset_left · refine Subset.trans (mul_subset_mul Subset.rfl ?_) h2L₂ exact Subset.trans (inv_subset.mpr...
Mathlib/MeasureTheory/Measure/Haar/Basic.lean
436
443
/- Copyright (c) 2022 Anatole Dedecker. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Anatole Dedecker -/ import Mathlib.Topology.Connected.Basic /-! # Locally connected topological spaces A topological space is **locally connected** if each neighborhood filter admi...
∀ F : Set α, IsOpen F → ∀ x ∈ F, IsOpen (connectedComponentIn F x) := by constructor · intro h exact fun F hF x _ => hF.connectedComponentIn · intro h rw [locallyConnectedSpace_iff_subsets_isOpen_isConnected] refine fun x U hU => ⟨connectedComponentIn (interior U) x, (connected...
Mathlib/Topology/Connected/LocallyConnected.lean
89
101
/- Copyright (c) 2015 Microsoft Corporation. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro -/ import Mathlib.Data.Multiset.ZeroCons /-! # Basic results on multisets -/ -- No algebra should be required assert_not_exists Monoid universe v open List S...
Mathlib/Data/Multiset/Basic.lean
2,718
2,722
/- Copyright (c) 2022 Antoine Labelle. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Antoine Labelle -/ import Mathlib.LinearAlgebra.Contraction import Mathlib.Algebra.Group.Equiv.TypeTags /-! # Monoid representations This file introduces monoid representations and ...
Mathlib/RepresentationTheory/Basic.lean
109
109
/- Copyright (c) 2019 Zhouhang Zhou. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Sébastien Gouëzel, Frédéric Dupuis -/ import Mathlib.Algebra.BigOperators.Field import Mathlib.Analysis.Complex.Basic import Mathlib.Analysis.InnerProductSpace.Defs impor...
simp only [inner_add_left, inner_add_right]; ring
Mathlib/Analysis/InnerProductSpace/Basic.lean
230
230
/- Copyright (c) 2021 Rémy Degenne. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Zhouhang Zhou, Yury Kudryashov -/ import Mathlib.MeasureTheory.Function.L1Space.Integrable import Mathlib.MeasureTheory.Function.LpSpace.Indicator /-! # Functions integrable on a set an...
[IsMeasurablyGenerated l] (hfm : StronglyMeasurableAtFilter f l μ) (hμ : μ.FiniteAtFilter l) {b} (hf : Tendsto f l (𝓝 b)) : IntegrableAtFilter f l μ := hμ.integrableAtFilter hfm hf.norm.isBoundedUnder_le
Mathlib/MeasureTheory/Integral/IntegrableOn.lean
490
493
/- Copyright (c) 2021 Aaron Anderson. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Aaron Anderson -/ import Mathlib.Algebra.Group.Support import Mathlib.Algebra.Order.Monoid.Unbundled.WithTop import Mathlib.Order.WellFoundedSet /-! # Hahn Series If `Γ` is ordered an...
exact x.isWF_support.min_mem (support_nonempty_iff.2 hx) theorem order_le_of_coeff_ne_zero {Γ} [Zero Γ] [LinearOrder Γ] {x : HahnSeries Γ R} {g : Γ} (h : x.coeff g ≠ 0) : x.order ≤ g := le_trans (le_of_eq (order_of_ne (ne_zero_of_coeff_ne_zero h))) (Set.IsWF.min_le _ _ ((mem_support _ _).2 h)) @[simp] the...
Mathlib/RingTheory/HahnSeries/Basic.lean
357
367
/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov -/ import Mathlib.Order.Filter.Tendsto import Mathlib.Data.Set.Accumulate import Mathlib.Topology.Bornology.Basic import Mathlib.Topolog...
∃ t : Finset X, ⋃ x ∈ t, U x = ⊤ := by obtain ⟨t, -, s⟩ := IsCompact.elim_nhds_subcover isCompact_univ U fun x _ => hU x exact ⟨t, top_unique s⟩ theorem compactSpace_of_finite_subfamily_closed (h : ∀ {ι : Type u} (t : ι → Set X), (∀ i, IsClosed (t i)) → ⋂ i, t i = ∅ → ∃ u : Finset ι, ⋂ i ∈ u, t i = ∅...
Mathlib/Topology/Compactness/Compact.lean
686
692
/- Copyright (c) 2024 Brendan Murphy. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Brendan Murphy -/ import Mathlib.RingTheory.Regular.IsSMulRegular import Mathlib.RingTheory.Artinian.Module import Mathlib.RingTheory.Nakayama import Mathlib.Algebra.Equiv.TransferInst...
-- TODO: apply the above to localization and completion (Corollary 1.1.3 in B&H) lemma map_first_exact_on_four_term_right_exact_of_isSMulRegular_last {rs : List R} {f₁ : M →ₗ[R] M₂} {f₂ : M₂ →ₗ[R] M₃} {f₃ : M₃ →ₗ[R] M₄} (h₁₂ : Exact f₁ f₂) (h₂₃ : Exact f₂ f₃) (h₃ : Surjective f₃) (h₄ : IsWeaklyRegular M₄ r...
Mathlib/RingTheory/Regular/RegularSequence.lean
552
568
/- Copyright (c) 2020 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kim Morrison -/ import Mathlib.Algebra.BigOperators.Group.Finset.Piecewise import Mathlib.Algebra.Group.Ext import Mathlib.CategoryTheory.Limits.Preserves.Shapes.BinaryProducts import Ma...
classical simp [biproduct.lift_eq, biproduct.desc_eq, comp_sum, sum_comp, biproduct.ι_π_assoc, comp_dite, dite_comp] theorem biproduct.map_eq [HasFiniteBiproducts C] {f g : J → C} {h : ∀ j, f j ⟶ g j} :
Mathlib/CategoryTheory/Preadditive/Biproducts.lean
224
228
/- Copyright (c) 2021 Mario Carneiro. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Thomas Murrills -/ import Mathlib.Data.Int.Cast.Lemmas import Mathlib.Tactic.NormNum.Basic /-! ## `norm_num` plugin for `^`. -/ assert_not_exists RelIso namespace Ma...
let ⟨c2, p2⟩ := go d a hi c1 b q(Nat.pow $a $hi = $c1) ⟨⟩ ⟨c2, q(($p1).trans $p2)⟩
Mathlib/Tactic/NormNum/Pow.lean
102
103
/- Copyright (c) 2023 David Loeffler. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: David Loeffler -/ import Mathlib.Analysis.Convolution import Mathlib.Analysis.SpecialFunctions.Trigonometric.EulerSineProd import Mathlib.Analysis.SpecialFunctions.Gamma.BohrMollerup i...
namespace Complex theorem Gamma_mul_Gamma_add_half (s : ℂ) : Gamma s * Gamma (s + 1 / 2) = Gamma (2 * s) * (2 : ℂ) ^ (1 - 2 * s) * ↑(√π) := by suffices (fun z => (Gamma z)⁻¹ * (Gamma (z + 1 / 2))⁻¹) = fun z => (Gamma (2 * z))⁻¹ * (2 : ℂ) ^ (2 * z - 1) / ↑(√π) by convert congr_arg Inv.inv (congr_fun th...
Mathlib/Analysis/SpecialFunctions/Gamma/Beta.lean
539
551
/- Copyright (c) 2024 María Inés de Frutos-Fernández. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: David Kurniadi Angdinata, Fabrizio Barroero, Laura Capuano, Nirvana Coppola, María Inés de Frutos-Fernández, Sam van Gool, Silvain Rideau-Kikuchi, Amos Turchet, Frances...
## Tags absolute value, Ostrowski's theorem -/ open Filter Nat Real Topology
Mathlib/NumberTheory/Ostrowski.lean
36
41
/- Copyright (c) 2018 Chris Hughes. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Chris Hughes, Abhimanyu Pallavi Sudhir, Jean Lo, Calle Sönne, Sébastien Gouëzel, Rémy Degenne, David Loeffler -/ import Mathlib.Analysis.SpecialFunctions.Pow.Complex import Qq /-! # P...
theorem exp_one_rpow (x : ℝ) : exp 1 ^ x = exp x := by rw [← exp_mul, one_mul]
Mathlib/Analysis/SpecialFunctions/Pow/Real.lean
60
60
/- Copyright (c) 2017 Johannes Hölzl. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Mario Carneiro, Floris van Doorn, Violeta Hernández Palacios -/ import Mathlib.Algebra.GroupWithZero.Divisibility import Mathlib.Data.Nat.SuccPred import Mathlib.Order.SuccPred.Initial...
end Ordinal namespace Cardinal open Ordinal
Mathlib/SetTheory/Ordinal/Arithmetic.lean
1,180
1,186
/- Copyright (c) 2019 Yury Kudryashov. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Yury Kudryashov -/ import Mathlib.Algebra.Order.BigOperators.Ring.Finset import Mathlib.Analysis.Convex.Hull import Mathlib.LinearAlgebra.AffineSpace.Basis /-! # Convex combinations ...
have hW₁ : (s ∪ s').sum W = 1 := by rw [sum_add_distrib, ← sum_subset subset_union_left, ← sum_subset subset_union_right, sum_ite_of_true, sum_ite_of_true, ← mul_sum, ← mul_sum, hw₁, hw₁', ← add_mul, hab, mul_one] <;> intros <;> simp_all refine ⟨s ∪ s', W, ?_, hW₁, ?_⟩ · rintro...
Mathlib/Analysis/Convex/Combination.lean
283
290
/- Copyright (c) 2023 Michael Stoll. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Michael Stoll -/ import Mathlib.Analysis.Complex.Convex import Mathlib.Analysis.SpecialFunctions.Integrals import Mathlib.Analysis.Calculus.Deriv.Shift /-! # Estimates for the complex ...
· simp conv => enter [2]; rw [← div_one (‖z‖ ^ n)] gcongr norm_cast · rw [← tendsto_sub_nhds_zero_iff] conv => enter [1, x]; rw [← div_one (_ - _), ← logTaylor] rw [← isLittleO_iff_tendsto fun _ h ↦ (one_ne_zero h).elim] refine IsLittleO.trans_isBigO ?_ <| isBigO_const_one ℂ (1 : ℝ) atTop ...
Mathlib/Analysis/SpecialFunctions/Complex/LogBounds.lean
232
242
/- Copyright (c) 2020 Kim Morrison. All rights reserved. Released under Apache 2.0 license as described in the file LICENSE. Authors: Kim Morrison, Shing Tak Lam, Mario Carneiro -/ import Mathlib.Algebra.BigOperators.Intervals import Mathlib.Algebra.BigOperators.Ring.List import Mathlib.Data.Int.ModEq import Mathlib.Da...
exact ofDigits_monotone (digits p.succ n.succ) <| Nat.succ_pos p theorem pow_length_le_mul_ofDigits {b : ℕ} {l : List ℕ} (hl : l ≠ []) (hl2 : l.getLast hl ≠ 0) : (b + 2) ^ l.length ≤ (b + 2) * ofDigits (b + 2) l := by rw [← List.dropLast_append_getLast hl]
Mathlib/Data/Nat/Digits.lean
490
494