Context stringlengths 285 157k | file_name stringlengths 21 79 | start int64 14 3.67k | end int64 18 3.69k | theorem stringlengths 25 2.71k | proof stringlengths 5 10.6k |
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/-
Copyright (c) 2024 Arend Mellendijk. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Arend Mellendijk
-/
import Mathlib.Analysis.SpecialFunctions.Integrals
import Mathlib.Analysis.SumIntegralComparisons
import Mathlib.NumberTheory.Harmonic.Defs
/-!
This file prove... | Mathlib/NumberTheory/Harmonic/Bounds.lean | 26 | 50 | theorem harmonic_le_one_add_log (n : ℕ) :
harmonic n ≤ 1 + Real.log n := by |
by_cases hn0 : n = 0
· simp [hn0]
have hn : 1 ≤ n := Nat.one_le_iff_ne_zero.mpr hn0
simp_rw [harmonic_eq_sum_Icc, Rat.cast_sum, Rat.cast_inv, Rat.cast_natCast]
rw [← Finset.sum_erase_add (Finset.Icc 1 n) _ (Finset.left_mem_Icc.mpr hn), add_comm,
Nat.cast_one, inv_one]
refine add_le_add_left ?_ 1
simp... |
/-
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.Prod
import Mathlib.Order.Cover
#align_import algebra.support from "leanprover-community/mathlib"@"29cb56a7b35f72758b05a30490e1f10bd62... | Mathlib/Algebra/Group/Support.lean | 149 | 152 | theorem range_subset_insert_image_mulSupport (f : α → M) :
range f ⊆ insert 1 (f '' mulSupport f) := by |
simpa only [range_subset_iff, mem_insert_iff, or_iff_not_imp_left] using
fun x (hx : x ∈ mulSupport f) => mem_image_of_mem f hx
|
/-
Copyright (c) 2022 Andrew Yang. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Andrew Yang
-/
import Mathlib.RingTheory.Ideal.Operations
import Mathlib.Algebra.Module.Torsion
import Mathlib.Algebra.Ring.Idempotents
import Mathlib.LinearAlgebra.FiniteDimensional
impo... | Mathlib/RingTheory/Ideal/Cotangent.lean | 122 | 128 | theorem cotangentIdeal_square (I : Ideal R) : I.cotangentIdeal ^ 2 = ⊥ := by |
rw [eq_bot_iff, pow_two I.cotangentIdeal, ← smul_eq_mul]
intro x hx
refine Submodule.smul_induction_on hx ?_ ?_
· rintro _ ⟨x, hx, rfl⟩ _ ⟨y, hy, rfl⟩; apply (Submodule.Quotient.eq _).mpr _
rw [sub_zero, pow_two]; exact Ideal.mul_mem_mul hx hy
· intro x y hx hy; exact add_mem hx hy
|
/-
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.Independence.Kernel
import Mathlib.Probability.Kernel.Condexp
/-!
# Conditional Independence
We define conditional independence of sets/σ-alg... | Mathlib/Probability/Independence/Conditional.lean | 239 | 249 | theorem condIndepSets_singleton_iff {μ : Measure Ω} [IsFiniteMeasure μ]
{s t : Set Ω} (hs : MeasurableSet s) (ht : MeasurableSet t) :
CondIndepSets m' hm' {s} {t} μ ↔ (μ⟦s ∩ t | m'⟧) =ᵐ[μ] (μ⟦s | m'⟧) * (μ⟦t | m'⟧) := by |
rw [condIndepSets_iff _ _ _ _ ?_ ?_]
· simp only [Set.mem_singleton_iff, forall_eq_apply_imp_iff, forall_eq]
· intros s' hs'
rw [Set.mem_singleton_iff] at hs'
rwa [hs']
· intros s' hs'
rw [Set.mem_singleton_iff] at hs'
rwa [hs']
|
/-
Copyright (c) 2019 Neil Strickland. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Neil Strickland
-/
import Mathlib.Algebra.BigOperators.Intervals
import Mathlib.Algebra.BigOperators.Ring
import Mathlib.Algebra.Order.BigOperators.Ring.Finset
import Mathlib.Algebra.... | Mathlib/Algebra/GeomSum.lean | 553 | 564 | theorem geom_sum_ne_zero [LinearOrderedRing α] (hx : x ≠ -1) (hn : n ≠ 0) :
∑ i ∈ range n, x ^ i ≠ 0 := by |
obtain _ | _ | n := n
· cases hn rfl
· simp only [zero_add, range_one, sum_singleton, pow_zero, ne_eq, one_ne_zero, not_false_eq_true]
rw [Ne, eq_neg_iff_add_eq_zero, ← Ne] at hx
obtain h | h := hx.lt_or_lt
· have := geom_sum_alternating_of_lt_neg_one h n.one_lt_succ_succ
split_ifs at this
· exact ... |
/-
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.Algebra.Group.Equiv.TypeTags
import Mathlib.Algebra.Module.Defs
import Mathlib.Algebra.Module.LinearMap.Basic
import Mathlib.Algebra.MonoidAlgebra.Ba... | Mathlib/RepresentationTheory/Basic.lean | 416 | 425 | theorem smul_tprod_one_asModule (r : MonoidAlgebra k G) (x : V) (y : W) :
-- Porting note: required to since Lean 4 doesn't unfold asModule
let x' : ρV.asModule := x
let z : (ρV.tprod 1).asModule := x ⊗ₜ y
r • z = (r • x') ⊗ₜ y := by |
show asAlgebraHom (ρV ⊗ 1) _ _ = asAlgebraHom ρV _ _ ⊗ₜ _
simp only [asAlgebraHom_def, MonoidAlgebra.lift_apply, tprod_apply, MonoidHom.one_apply,
LinearMap.finsupp_sum_apply, LinearMap.smul_apply, TensorProduct.map_tmul, LinearMap.one_apply]
simp only [Finsupp.sum, TensorProduct.sum_tmul]
rfl
|
/-
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.Analytic.Basic
import Mathlib.Analysis.Analytic.CPolynomial
import Mathlib.Analysis.Calculus.Deriv.Basic
import Mathlib.Analysis.Calculus.Co... | Mathlib/Analysis/Calculus/FDeriv/Analytic.lean | 219 | 233 | theorem HasFiniteFPowerSeriesOnBall.fderiv' (h : HasFiniteFPowerSeriesOnBall f p x n r) :
HasFiniteFPowerSeriesOnBall (fderiv 𝕜 f) p.derivSeries x (n - 1) r := by |
obtain rfl | hn := eq_or_ne n 0
· rw [zero_tsub]
refine HasFiniteFPowerSeriesOnBall.bound_zero_of_eq_zero (fun y hy ↦ ?_) h.r_pos fun n ↦ ?_
· rw [Filter.EventuallyEq.fderiv_eq (f := fun _ ↦ 0)]
· rw [fderiv_const, Pi.zero_apply]
· exact Filter.eventuallyEq_iff_exists_mem.mpr ⟨EMetric.ball x r,... |
/-
Copyright (c) 2019 Neil Strickland. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Neil Strickland
-/
import Mathlib.Algebra.BigOperators.Intervals
import Mathlib.Algebra.BigOperators.Ring
import Mathlib.Algebra.Order.BigOperators.Ring.Finset
import Mathlib.Algebra.... | Mathlib/Algebra/GeomSum.lean | 87 | 94 | theorem op_geom_sum₂ (x y : α) (n : ℕ) : ∑ i ∈ range n, op y ^ (n - 1 - i) * op x ^ i =
∑ i ∈ range n, op y ^ i * op x ^ (n - 1 - i) := by |
rw [← sum_range_reflect]
refine sum_congr rfl fun j j_in => ?_
rw [mem_range, Nat.lt_iff_add_one_le] at j_in
congr
apply tsub_tsub_cancel_of_le
exact le_tsub_of_add_le_right j_in
|
/-
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... | Mathlib/Topology/Connected/LocallyConnected.lean | 41 | 52 | theorem locallyConnectedSpace_iff_open_connected_subsets :
LocallyConnectedSpace α ↔
∀ x, ∀ U ∈ 𝓝 x, ∃ V : Set α, V ⊆ U ∧ IsOpen V ∧ x ∈ V ∧ IsConnected V := by |
simp_rw [locallyConnectedSpace_iff_open_connected_basis]
refine forall_congr' fun _ => ?_
constructor
· intro h U hU
rcases h.mem_iff.mp hU with ⟨V, hV, hVU⟩
exact ⟨V, hVU, hV⟩
· exact fun h => ⟨fun U => ⟨fun hU =>
let ⟨V, hVU, hV⟩ := h U hU
⟨V, hV, hVU⟩, fun ⟨V, ⟨hV, hxV, _⟩, hVU⟩ => mem... |
/-
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.Kernel.Basic
import Mathlib.MeasureTheory.Constructions.Prod.Basic
import Mathlib.MeasureTheory.Integral.DominatedConvergence
#align_import pr... | Mathlib/Probability/Kernel/MeasurableIntegral.lean | 113 | 119 | theorem measurable_kernel_prod_mk_left' [IsSFiniteKernel η] {s : Set (β × γ)} (hs : MeasurableSet s)
(a : α) : Measurable fun b => η (a, b) (Prod.mk b ⁻¹' s) := by |
have : ∀ b, Prod.mk b ⁻¹' s = {c | ((a, b), c) ∈ {p : (α × β) × γ | (p.1.2, p.2) ∈ s}} := by
intro b; rfl
simp_rw [this]
refine (measurable_kernel_prod_mk_left ?_).comp measurable_prod_mk_left
exact (measurable_fst.snd.prod_mk measurable_snd) hs
|
/-
Copyright (c) 2023 Rémy Degenne. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Rémy Degenne, Peter Pfaffelhuber
-/
import Mathlib.MeasureTheory.PiSystem
import Mathlib.Order.OmegaCompletePartialOrder
import Mathlib.Topology.Constructions
import Mathlib.MeasureTheor... | Mathlib/MeasureTheory/Constructions/Cylinders.lean | 107 | 126 | theorem comap_eval_le_generateFrom_squareCylinders_singleton
(α : ι → Type*) [m : ∀ i, MeasurableSpace (α i)] (i : ι) :
MeasurableSpace.comap (Function.eval i) (m i) ≤
MeasurableSpace.generateFrom
((fun t ↦ ({i} : Set ι).pi t) '' univ.pi fun i ↦ {s : Set (α i) | MeasurableSet s}) := by |
simp only [Function.eval, singleton_pi, ge_iff_le]
rw [MeasurableSpace.comap_eq_generateFrom]
refine MeasurableSpace.generateFrom_mono fun S ↦ ?_
simp only [mem_setOf_eq, mem_image, mem_univ_pi, forall_exists_index, and_imp]
intro t ht h
classical
refine ⟨fun j ↦ if hji : j = i then by convert t else uni... |
/-
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
#al... | Mathlib/AlgebraicTopology/DoldKan/PInfty.lean | 123 | 125 | theorem QInfty_idem : (QInfty : K[X] ⟶ _) ≫ QInfty = QInfty := by |
ext n
exact QInfty_f_idem n
|
/-
Copyright (c) 2018 Mario Carneiro. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mario Carneiro
-/
import Mathlib.Data.Set.Lattice
import Mathlib.Logic.Small.Basic
import Mathlib.Logic.Function.OfArity
import Mathlib.Order.WellFounded
#align_import set_theory.zfc.... | Mathlib/SetTheory/ZFC/Basic.lean | 1,693 | 1,694 | theorem sInter_empty : ⋂₀ (∅ : Class.{u}) = univ := by |
rw [sInter, classToCong_empty, Set.sInter_empty, univ]
|
/-
Copyright (c) 2019 Gabriel Ebner. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Gabriel Ebner, Sébastien Gouëzel, Yury Kudryashov, Anatole Dedecker
-/
import Mathlib.Analysis.Calculus.Deriv.Basic
import Mathlib.Analysis.Calculus.FDeriv.Add
#align_import analysis.c... | Mathlib/Analysis/Calculus/Deriv/Add.lean | 158 | 160 | theorem HasStrictDerivAt.sum (h : ∀ i ∈ u, HasStrictDerivAt (A i) (A' i) x) :
HasStrictDerivAt (fun y => ∑ i ∈ u, A i y) (∑ i ∈ u, A' i) x := by |
simpa [ContinuousLinearMap.sum_apply] using (HasStrictFDerivAt.sum h).hasStrictDerivAt
|
/-
Copyright (c) 2019 Reid Barton. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Patrick Massot, Sébastien Gouëzel, Zhouhang Zhou, Reid Barton
-/
import Mathlib.Logic.Equiv.Fin
import Mathlib.Topology.DenseEmbedding
import Mathlib.Topology.Support
impo... | Mathlib/Topology/Homeomorph.lean | 307 | 309 | theorem isPreconnected_preimage {s : Set Y} (h : X ≃ₜ Y) :
IsPreconnected (h ⁻¹' s) ↔ IsPreconnected s := by |
rw [← image_symm, isPreconnected_image]
|
/-
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.Bool.Basic
import Mathlib.Data.Option.Defs
import Mathlib.Data.Prod.Basic
import Mathlib.Data.Sigma.Basic
import Mathlib... | Mathlib/Logic/Equiv/Basic.lean | 820 | 823 | theorem prodCongrLeft_trans_prodComm :
(prodCongrLeft e).trans (prodComm _ _) = (prodComm _ _).trans (prodCongrRight e) := by |
ext ⟨a, b⟩ : 1
simp
|
/-
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.Monoid.Defs
import Mathlib.Algebra.Order.Sub.Defs
import Mathlib.Util.AssertExists
#ali... | Mathlib/Algebra/Order/Group/Defs.lean | 529 | 530 | theorem mul_inv_le_iff_le_mul' : a * b⁻¹ ≤ c ↔ a ≤ b * c := by |
rw [← inv_mul_le_iff_le_mul, mul_comm]
|
/-
Copyright (c) 2020 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Mario Carneiro, Alexander Bentkamp, Anne Baanen
-/
import Mathlib.Algebra.BigOperators.Fin
import Mathlib.LinearAlgebra.Finsupp
import Mathlib.LinearAlgebra.Prod
import Ma... | Mathlib/LinearAlgebra/LinearIndependent.lean | 623 | 634 | theorem LinearIndependent.units_smul {v : ι → M} (hv : LinearIndependent R v) (w : ι → Rˣ) :
LinearIndependent R (w • v) := by |
rw [linearIndependent_iff''] at hv ⊢
intro s g hgs hsum i
rw [← (w i).mul_left_eq_zero]
refine hv s (fun i => g i • (w i : R)) (fun i hi => ?_) ?_ i
· dsimp only
exact (hgs i hi).symm ▸ zero_smul _ _
· rw [← hsum, Finset.sum_congr rfl _]
intros
erw [Pi.smul_apply, smul_assoc]
rfl
|
/-
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.Order.WellFoundedSet
#align_import ring_theory.hahn_series from "leanprover-community/mathlib"@"a484a7d0eade4e126... | Mathlib/RingTheory/HahnSeries/Basic.lean | 331 | 338 | theorem coeff_eq_zero_of_lt_order {x : HahnSeries Γ R} {i : Γ} (hi : i < x.order) :
x.coeff i = 0 := by |
rcases eq_or_ne x 0 with (rfl | hx)
· simp
contrapose! hi
rw [← mem_support] at hi
rw [order_of_ne hx]
exact Set.IsWF.not_lt_min _ _ hi
|
/-
Copyright (c) 2018 Mario Carneiro. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mario Carneiro, Aurélien Saue, Anne Baanen
-/
import Mathlib.Algebra.Order.Ring.Rat
import Mathlib.Tactic.NormNum.Inv
import Mathlib.Tactic.NormNum.Pow
import Mathlib.Util.AtomM
/-!
#... | Mathlib/Tactic/Ring/Basic.lean | 415 | 416 | theorem mul_add (_ : (a : R) * b₁ = c₁) (_ : a * b₂ = c₂) (_ : c₁ + 0 + c₂ = d) :
a * (b₁ + b₂) = d := by | subst_vars; simp [_root_.mul_add]
|
/-
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
#align_import probability.process.hitting_time from "leanprover-community/ma... | Mathlib/Probability/Process/HittingTime.lean | 135 | 143 | theorem hitting_mem_set [IsWellOrder ι (· < ·)] {m : ι} (h_exists : ∃ j ∈ Set.Icc n m, u j ω ∈ s) :
u (hitting u s n m ω) ω ∈ s := by |
simp_rw [hitting, if_pos h_exists]
have h_nonempty : (Set.Icc n m ∩ {i : ι | u i ω ∈ s}).Nonempty := by
obtain ⟨k, hk₁, hk₂⟩ := h_exists
exact ⟨k, Set.mem_inter hk₁ hk₂⟩
have h_mem := csInf_mem h_nonempty
rw [Set.mem_inter_iff] at h_mem
exact h_mem.2
|
/-
Copyright (c) 2019 Kevin Buzzard. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Kevin Buzzard
-/
import Mathlib.Data.Real.Basic
import Mathlib.Data.ENNReal.Real
import Mathlib.Data.Sign
#align_import data.real.ereal from "leanprover-community/mathlib"@"2196ab363eb... | Mathlib/Data/Real/EReal.lean | 437 | 443 | theorem eq_bot_iff_forall_lt (x : EReal) : x = ⊥ ↔ ∀ y : ℝ, x < (y : EReal) := by |
constructor
· rintro rfl
exact bot_lt_coe
· contrapose!
intro h
exact ⟨x.toReal, coe_toReal_le h⟩
|
/-
Copyright (c) 2021 Andrew Yang. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Andrew Yang, Yury G. Kudryashov
-/
import Mathlib.Tactic.TFAE
import Mathlib.Topology.ContinuousOn
#align_import topology.inseparable from "leanprover-community/mathlib"@"bcfa726826abd57... | Mathlib/Topology/Inseparable.lean | 610 | 612 | theorem continuous_lift₂ {f : X → Y → Z} {hf : ∀ a b c d, (a ~ᵢ c) → (b ~ᵢ d) → f a b = f c d} :
Continuous (uncurry <| lift₂ f hf) ↔ Continuous (uncurry f) := by |
simp only [continuous_iff_continuousOn_univ, continuousOn_lift₂, preimage_univ]
|
/-
Copyright (c) 2021 Rémy Degenne. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Rémy Degenne
-/
import Mathlib.MeasureTheory.Constructions.BorelSpace.Order
import Mathlib.Order.Filter.ENNReal
#align_import measure_theory.function.ess_sup from "leanprover-community/... | Mathlib/MeasureTheory/Function/EssSup.lean | 218 | 222 | theorem essSup_comp_le_essSup_map_measure (hf : AEMeasurable f μ) :
essSup (g ∘ f) μ ≤ essSup g (Measure.map f μ) := by |
refine limsSup_le_limsSup_of_le ?_
rw [← Filter.map_map]
exact Filter.map_mono (Measure.tendsto_ae_map hf)
|
/-
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.MeasureSpace
import Mathlib.MeasureTheory.Measure.Regular
import Mathlib.Topology.Sets.Compacts
#align_import measure_theory... | Mathlib/MeasureTheory/Measure/Content.lean | 296 | 301 | theorem outerMeasure_exists_open {A : Set G} (hA : μ.outerMeasure A ≠ ∞) {ε : ℝ≥0} (hε : ε ≠ 0) :
∃ U : Opens G, A ⊆ U ∧ μ.outerMeasure U ≤ μ.outerMeasure A + ε := by |
rcases inducedOuterMeasure_exists_set _ μ.innerContent_iUnion_nat μ.innerContent_mono hA
(ENNReal.coe_ne_zero.2 hε) with
⟨U, hU, h2U, h3U⟩
exact ⟨⟨U, hU⟩, h2U, h3U⟩
|
/-
Copyright (c) 2020 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Anne Baanen, Filippo A. E. Nuccio
-/
import Mathlib.RingTheory.IntegralClosure
import Mathlib.RingTheory.FractionalIdeal.Basic
#align_import ring_theory.fractional_ideal from "leanprover... | Mathlib/RingTheory/FractionalIdeal/Operations.lean | 930 | 935 | theorem isNoetherian_coeIdeal [IsNoetherianRing R₁] (I : Ideal R₁) :
IsNoetherian R₁ (I : FractionalIdeal R₁⁰ K) := by |
rw [isNoetherian_iff]
intro J hJ
obtain ⟨J, rfl⟩ := le_one_iff_exists_coeIdeal.mp (le_trans hJ coeIdeal_le_one)
exact (IsNoetherian.noetherian J).map _
|
/-
Copyright (c) 2021 Sébastien Gouëzel. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Sébastien Gouëzel
-/
import Mathlib.MeasureTheory.Covering.VitaliFamily
import Mathlib.MeasureTheory.Measure.Regular
import Mathlib.MeasureTheory.Function.AEMeasurableOrder
import M... | Mathlib/MeasureTheory/Covering/Differentiation.lean | 659 | 680 | theorem withDensity_limRatioMeas_eq : μ.withDensity (v.limRatioMeas hρ) = ρ := by |
ext1 s hs
refine le_antisymm ?_ ?_
· have : Tendsto (fun t : ℝ≥0 =>
((t : ℝ≥0∞) ^ 2 * ρ s : ℝ≥0∞)) (𝓝[>] 1) (𝓝 ((1 : ℝ≥0∞) ^ 2 * ρ s)) := by
refine ENNReal.Tendsto.mul ?_ ?_ tendsto_const_nhds ?_
· exact ENNReal.Tendsto.pow (ENNReal.tendsto_coe.2 nhdsWithin_le_nhds)
· simp only [one_p... |
/-
Copyright (c) 2020 Kenji Nakagawa. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Kenji Nakagawa, Anne Baanen, Filippo A. E. Nuccio
-/
import Mathlib.Algebra.Algebra.Subalgebra.Pointwise
import Mathlib.AlgebraicGeometry.PrimeSpectrum.Maximal
import Mathlib.Algebraic... | Mathlib/RingTheory/DedekindDomain/Ideal.lean | 1,529 | 1,538 | theorem count_span_normalizedFactors_eq {r X : R} (hr : r ≠ 0) (hX : Prime X) :
Multiset.count (Ideal.span {X} : Ideal R) (normalizedFactors (Ideal.span {r})) =
Multiset.count (normalize X) (normalizedFactors r) := by |
have := multiplicity_eq_multiplicity_span (R := R) (a := X) (b := r)
rw [multiplicity_eq_count_normalizedFactors (Prime.irreducible hX) hr,
multiplicity_eq_count_normalizedFactors (Prime.irreducible ?_), normalize_apply,
normUnit_eq_one, Units.val_one, one_eq_top, mul_top, Nat.cast_inj] at this
simp only... |
/-
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.SetTheory.Ordinal.Basic
import Mathlib.Data.Nat.SuccPred
#align_import set_theory.ordinal.arithmetic fro... | Mathlib/SetTheory/Ordinal/Arithmetic.lean | 1,762 | 1,766 | theorem lsub_eq_lsub {ι ι' : Type u} (r : ι → ι → Prop) (r' : ι' → ι' → Prop) [IsWellOrder ι r]
[IsWellOrder ι' r'] {o} (ho : type r = o) (ho' : type r' = o)
(f : ∀ a < o, Ordinal.{max u v}) :
lsub.{_, v} (familyOfBFamily' r ho f) = lsub.{_, v} (familyOfBFamily' r' ho' f) := by |
rw [lsub_eq_blsub', lsub_eq_blsub']
|
/-
Copyright (c) 2017 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl
-/
import Mathlib.Init.Data.Quot
import Mathlib.Logic.Relator
import Mathlib.Logic.Unique
import Mathlib.Mathport.Notation
#align_import data.quot from "leanprover-comm... | Mathlib/Data/Quot.lean | 441 | 445 | theorem Quotient.induction_on_pi {ι : Type*} {α : ι → Sort*} [s : ∀ i, Setoid (α i)]
{p : (∀ i, Quotient (s i)) → Prop} (f : ∀ i, Quotient (s i))
(h : ∀ a : ∀ i, α i, p fun i ↦ ⟦a i⟧) : p f := by |
rw [← (funext fun i ↦ Quotient.out_eq (f i) : (fun i ↦ ⟦(f i).out⟧) = f)]
apply h
|
/-
Copyright (c) 2019 Patrick Massot. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Patrick Massot, Simon Hudon, Alice Laroche, Frédéric Dupuis, Jireh Loreaux
-/
import Lean.Elab.Tactic.Location
import Mathlib.Logic.Basic
import Mathlib.Init.Order.Defs
import Mathlib... | Mathlib/Tactic/PushNeg.lean | 39 | 42 | theorem not_nonempty_eq (s : Set γ) : (¬ s.Nonempty) = (s = ∅) := by |
have A : ∀ (x : γ), ¬(x ∈ (∅ : Set γ)) := fun x ↦ id
simp only [Set.Nonempty, not_exists, eq_iff_iff]
exact ⟨fun h ↦ Set.ext (fun x ↦ by simp only [h x, false_iff, A]), fun h ↦ by rwa [h]⟩
|
/-
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, Sébastien Gouëzel, Rémy Degenne
-/
import Mathlib.MeasureTheory.Integral.SetToL1
#align_import measure_theory.integral.bochner from "leanprover-communit... | Mathlib/MeasureTheory/Integral/Bochner.lean | 2,015 | 2,019 | theorem ae_eq_trim_of_stronglyMeasurable [TopologicalSpace γ] [MetrizableSpace γ] (hm : m ≤ m0)
{f g : β → γ} (hf : StronglyMeasurable[m] f) (hg : StronglyMeasurable[m] g)
(hfg : f =ᵐ[μ] g) : f =ᵐ[μ.trim hm] g := by |
rwa [EventuallyEq, ae_iff, trim_measurableSet_eq hm]
exact (hf.measurableSet_eq_fun hg).compl
|
/-
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, Patrick Massot
-/
import Mathlib.Topology.Order
#align_import topology.maps from "leanprover-community/mathlib"@"d91e7f7a7f1c7e9f0e18fdb6bde4f652004c73... | Mathlib/Topology/Maps.lean | 97 | 99 | theorem nhdsSet_eq_comap (hf : Inducing f) (s : Set X) :
𝓝ˢ s = comap f (𝓝ˢ (f '' s)) := by |
simp only [nhdsSet, sSup_image, comap_iSup, hf.nhds_eq_comap, iSup_image]
|
/-
Copyright (c) 2020 Kenji Nakagawa. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Kenji Nakagawa, Anne Baanen, Filippo A. E. Nuccio
-/
import Mathlib.Algebra.Algebra.Subalgebra.Pointwise
import Mathlib.AlgebraicGeometry.PrimeSpectrum.Maximal
import Mathlib.Algebraic... | Mathlib/RingTheory/DedekindDomain/Ideal.lean | 1,515 | 1,522 | theorem multiplicity_normalizedFactorsEquivSpanNormalizedFactors_symm_eq_multiplicity {r : R}
(hr : r ≠ 0) (I : { I : Ideal R | I ∈ normalizedFactors (Ideal.span ({r} : Set R)) }) :
multiplicity ((normalizedFactorsEquivSpanNormalizedFactors hr).symm I : R) r =
multiplicity (I : Ideal R) (Ideal.span {r}) :... |
obtain ⟨x, hx⟩ := (normalizedFactorsEquivSpanNormalizedFactors hr).surjective I
obtain ⟨a, ha⟩ := x
rw [hx.symm, Equiv.symm_apply_apply, Subtype.coe_mk,
multiplicity_normalizedFactorsEquivSpanNormalizedFactors_eq_multiplicity hr ha]
|
/-
Copyright (c) 2020 Joseph Myers. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Joseph Myers
-/
import Mathlib.LinearAlgebra.AffineSpace.AffineEquiv
#align_import linear_algebra.affine_space.affine_subspace from "leanprover-community/mathlib"@"e96bdfbd1e8c98a09ff75... | Mathlib/LinearAlgebra/AffineSpace/AffineSubspace.lean | 1,088 | 1,091 | theorem vectorSpan_eq_span_vsub_finset_right_ne [DecidableEq P] [DecidableEq V] {s : Finset P}
{p : P} (hp : p ∈ s) :
vectorSpan k (s : Set P) = Submodule.span k ((s.erase p).image (· -ᵥ p)) := by |
simp [vectorSpan_eq_span_vsub_set_right_ne _ (Finset.mem_coe.mpr hp)]
|
/-
Copyright (c) 2020 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Anne Baanen
-/
import Mathlib.Data.Fin.Tuple.Basic
import Mathlib.Data.List.Range
#align_import data.fin.vec_notation from "leanprover-community/mathlib"@"2445c98ae4b87eabebdde552593519b... | Mathlib/Data/Fin/VecNotation.lean | 350 | 364 | theorem vecAlt1_vecAppend (v : Fin (n + 1) → α) : vecAlt1 rfl (vecAppend rfl v v) = v ∘ bit1 := by |
ext i
simp_rw [Function.comp, vecAlt1, vecAppend_eq_ite]
cases n with
| zero =>
cases' i with i hi
simp only [Nat.zero_eq, Nat.zero_add, Nat.lt_one_iff] at hi; subst i; rfl
| succ n =>
split_ifs with h <;> simp_rw [bit1, bit0] <;> congr
· simp [Nat.mod_eq_of_lt, h]
· rw [Fin.val_mk, not_l... |
/-
Copyright (c) 2019 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Patrick Massot, Casper Putz, Anne Baanen
-/
import Mathlib.Data.Matrix.Block
import Mathlib.Data.Matrix.Notation
import Mathlib.LinearAlgebra.StdBasis
import Mathlib.Ri... | Mathlib/LinearAlgebra/Matrix/ToLin.lean | 644 | 646 | theorem LinearMap.toMatrix_algebraMap (x : R) :
LinearMap.toMatrix v₁ v₁ (algebraMap R (Module.End R M₁) x) = scalar n x := by |
simp [Module.algebraMap_end_eq_smul_id, LinearMap.toMatrix_id, smul_eq_diagonal_mul]
|
/-
Copyright (c) 2018 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Jens Wagemaker, Aaron Anderson
-/
import Mathlib.Algebra.EuclideanDomain.Basic
import Mathlib.RingTheory.PrincipalIdealDomain
import Mathlib.Algebra.GCDMonoid.Nat
#ali... | Mathlib/RingTheory/Int/Basic.lean | 93 | 96 | theorem Int.Prime.dvd_mul' {m n : ℤ} {p : ℕ} (hp : Nat.Prime p) (h : (p : ℤ) ∣ m * n) :
(p : ℤ) ∣ m ∨ (p : ℤ) ∣ n := by |
rw [Int.natCast_dvd, Int.natCast_dvd]
exact Int.Prime.dvd_mul hp h
|
/-
Copyright (c) 2019 Yury Kudriashov. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Yury Kudriashov
-/
import Mathlib.Algebra.Order.BigOperators.Ring.Finset
import Mathlib.Analysis.Convex.Hull
import Mathlib.LinearAlgebra.AffineSpace.Basis
#align_import analysis.con... | Mathlib/Analysis/Convex/Combination.lean | 50 | 51 | theorem Finset.centerMass_empty : (∅ : Finset ι).centerMass w z = 0 := by |
simp only [centerMass, sum_empty, smul_zero]
|
/-
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.Init.Core
import Mathlib.RingTheory.Polynomial.Cyclotomic.Roots
import Mathlib.NumberTheory.NumberField.Basic
import Mathlib.FieldTheory.Galois
#ali... | Mathlib/NumberTheory/Cyclotomic/Basic.lean | 250 | 259 | theorem iff_union_singleton_one :
IsCyclotomicExtension S A B ↔ IsCyclotomicExtension (S ∪ {1}) A B := by |
obtain hS | rfl := S.eq_empty_or_nonempty.symm
· exact iff_union_of_dvd _ _ (fun s _ => one_dvd _) hS
rw [empty_union]
refine ⟨fun H => ?_, fun H => ?_⟩
· refine (iff_adjoin_eq_top _ A _).2 ⟨fun s hs => ⟨1, by simp [mem_singleton_iff.1 hs]⟩, ?_⟩
simp [adjoin_singleton_one, empty]
· refine (iff_adjoin_e... |
/-
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.Complex
#align_import analysis.special_function... | Mathlib/Analysis/SpecialFunctions/Trigonometric/Arctan.lean | 162 | 165 | theorem arcsin_eq_arctan {x : ℝ} (h : x ∈ Ioo (-(1 : ℝ)) 1) :
arcsin x = arctan (x / √(1 - x ^ 2)) := by |
rw_mod_cast [arctan_eq_arcsin, div_pow, sq_sqrt, one_add_div, div_div, ← sqrt_mul,
mul_div_cancel₀, sub_add_cancel, sqrt_one, div_one] <;> simp at h <;> nlinarith [h.1, h.2]
|
/-
Copyright (c) 2021 Yaël Dillies. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Yaël Dillies
-/
import Mathlib.Algebra.Order.Group.Instances
import Mathlib.Analysis.Convex.Segment
import Mathlib.Tactic.GCongr
#align_import analysis.convex.star from "leanprover-comm... | Mathlib/Analysis/Convex/Star.lean | 233 | 238 | theorem StarConvex.add_left (hs : StarConvex 𝕜 x s) (z : E) :
StarConvex 𝕜 (z + x) ((fun x => z + x) '' s) := by |
intro y hy a b ha hb hab
obtain ⟨y', hy', rfl⟩ := hy
refine ⟨a • x + b • y', hs hy' ha hb hab, ?_⟩
rw [smul_add, smul_add, add_add_add_comm, ← add_smul, hab, one_smul]
|
/-
Copyright (c) 2018 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Kenny Lau, Johan Commelin, Mario Carneiro, Kevin Buzzard,
Amelia Livingston, Yury Kudryashov, Yakov Pechersky
-/
import Mathlib.Algebra.Group.Hom.Defs
import Mathlib.Da... | Mathlib/Algebra/Group/Subsemigroup/Basic.lean | 365 | 372 | theorem closure_induction' (s : Set M) {p : ∀ x, x ∈ closure s → Prop}
(mem : ∀ (x) (h : x ∈ s), p x (subset_closure h))
(mul : ∀ x hx y hy, p x hx → p y hy → p (x * y) (mul_mem hx hy)) {x} (hx : x ∈ closure s) :
p x hx := by |
refine Exists.elim ?_ fun (hx : x ∈ closure s) (hc : p x hx) => hc
exact
closure_induction hx (fun x hx => ⟨_, mem x hx⟩) fun x y ⟨hx', hx⟩ ⟨hy', hy⟩ =>
⟨_, mul _ _ _ _ hx hy⟩
|
/-
Copyright (c) 2014 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mario Carneiro
-/
import Mathlib.Algebra.Order.Ring.Cast
import Mathlib.Data.Int.Cast.Lemmas
import Mathlib.Data.Nat.Bitwise
import Mathlib.Data.Nat.PSub
import Mathlib.Data.Nat... | Mathlib/Data/Num/Lemmas.lean | 527 | 537 | theorem pred'_to_nat : ∀ n, (pred' n : ℕ) = Nat.pred n
| 1 => rfl
| bit0 n =>
have : Nat.succ ↑(pred' n) = ↑n := by |
rw [pred'_to_nat n, Nat.succ_pred_eq_of_pos (to_nat_pos n)]
match (motive :=
∀ k : Num, Nat.succ ↑k = ↑n → ↑(Num.casesOn k 1 bit1 : PosNum) = Nat.pred (_root_.bit0 n))
pred' n, this with
| 0, (h : ((1 : Num) : ℕ) = n) => by rw [← to_nat_inj.1 h]; rfl
| Num.pos p, (h : Nat.succ ↑p = n) =... |
/-
Copyright (c) 2019 Zhouhang Zhou. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Zhouhang Zhou
-/
import Mathlib.MeasureTheory.Function.LpOrder
#align_import measure_theory.function.l1_space from "leanprover-community/mathlib"@"ccdbfb6e5614667af5aa3ab2d50885e0ef44a... | Mathlib/MeasureTheory/Function/L1Space.lean | 248 | 253 | theorem HasFiniteIntegral.norm {f : α → β} (hfi : HasFiniteIntegral f μ) :
HasFiniteIntegral (fun a => ‖f a‖) μ := by |
have eq : (fun a => (nnnorm ‖f a‖ : ℝ≥0∞)) = fun a => (‖f a‖₊ : ℝ≥0∞) := by
funext
rw [nnnorm_norm]
rwa [HasFiniteIntegral, eq]
|
/-
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.Calculus.FDeriv.Equiv
import Mathlib.Analysis.Calculus.FormalMultilinearSeries
#align_import analysis.calculus.cont_diff_def from "lean... | Mathlib/Analysis/Calculus/ContDiff/Defs.lean | 1,481 | 1,482 | theorem contDiff_all_iff_nat : (∀ n, ContDiff 𝕜 n f) ↔ ∀ n : ℕ, ContDiff 𝕜 n f := by |
simp only [← contDiffOn_univ, contDiffOn_all_iff_nat]
|
/-
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, Scott Morrison, Jens Wagemaker
-/
import Mathlib.Algebra.MonoidAlgebra.Degree
import Mathlib.Algebra.Polynomial.Coeff
import Mathlib.Algebra.Polynomial.Mono... | Mathlib/Algebra/Polynomial/Degree/Definitions.lean | 1,297 | 1,299 | theorem leadingCoeff_quadratic (ha : a ≠ 0) : leadingCoeff (C a * X ^ 2 + C b * X + C c) = a := by |
rw [add_assoc, add_comm, leadingCoeff_add_of_degree_lt <| degree_linear_lt_degree_C_mul_X_sq ha,
leadingCoeff_C_mul_X_pow]
|
/-
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, Kevin Buzzard, Yury Kudryashov, Frédéric Dupuis,
Heather Macbeth
-/
import Mathlib.Algebra.Module.Submodule.EqLocus
import Mathlib.Algebra.Module.Subm... | Mathlib/LinearAlgebra/Span.lean | 779 | 779 | theorem lt_sup_iff_not_mem {I : Submodule R M} {a : M} : (I < I ⊔ R ∙ a) ↔ a ∉ I := by | simp
|
/-
Copyright (c) 2021 Rémy Degenne. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Rémy Degenne
-/
import Mathlib.MeasureTheory.Function.StronglyMeasurable.Lp
import Mathlib.MeasureTheory.Integral.Bochner
import Mathlib.Order.Filter.IndicatorFunction
import Mathlib.Mea... | Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean | 552 | 559 | theorem lpMeasToLpTrimLie_symm_toLp [one_le_p : Fact (1 ≤ p)] [NormedSpace ℝ F] (hm : m ≤ m0)
(f : α → F) (hf : Memℒp f p (μ.trim hm)) :
((lpMeasToLpTrimLie F ℝ p μ hm).symm (hf.toLp f) : Lp F p μ) =
(memℒp_of_memℒp_trim hm hf).toLp f := by |
ext1
rw [← lpMeas_coe]
refine (lpTrimToLpMeas_ae_eq hm _).trans ?_
exact (ae_eq_of_ae_eq_trim (Memℒp.coeFn_toLp hf)).trans (Memℒp.coeFn_toLp _).symm
|
/-
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, Floris van Doorn
-/
import Mathlib.Data.Fintype.BigOperators
import Mathlib.Data.Finsupp.Defs
import Mathlib.Data.Nat.Cast.Order
import Mathlib.Data.Set... | Mathlib/SetTheory/Cardinal/Basic.lean | 1,795 | 1,795 | theorem aleph0_mul_nat {n : ℕ} (hn : n ≠ 0) : ℵ₀ * n = ℵ₀ := by | rw [mul_comm, nat_mul_aleph0 hn]
|
/-
Copyright (c) 2022 María Inés de Frutos-Fernández. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: María Inés de Frutos-Fernández
-/
import Mathlib.RingTheory.DedekindDomain.Ideal
import Mathlib.RingTheory.Valuation.ExtendToLocalization
import Mathlib.RingTheory.Valu... | Mathlib/RingTheory/DedekindDomain/AdicValuation.lean | 114 | 120 | theorem int_valuation_le_one (x : R) : v.intValuationDef x ≤ 1 := by |
rw [intValuationDef]
by_cases hx : x = 0
· rw [if_pos hx]; exact WithZero.zero_le 1
· rw [if_neg hx, ← WithZero.coe_one, ← ofAdd_zero, WithZero.coe_le_coe, ofAdd_le,
Right.neg_nonpos_iff]
exact Int.natCast_nonneg _
|
/-
Copyright (c) 2021 Rémy Degenne. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Rémy Degenne
-/
import Mathlib.MeasureTheory.Function.StronglyMeasurable.Lp
import Mathlib.MeasureTheory.Integral.Bochner
import Mathlib.Order.Filter.IndicatorFunction
import Mathlib.Mea... | Mathlib/MeasureTheory/Function/ConditionalExpectation/AEMeasurable.lean | 304 | 310 | theorem mem_lpMeasSubgroup_toLp_of_trim (hm : m ≤ m0) (f : Lp F p (μ.trim hm)) :
(memℒp_of_memℒp_trim hm (Lp.memℒp f)).toLp f ∈ lpMeasSubgroup F m p μ := by |
let hf_mem_ℒp := memℒp_of_memℒp_trim hm (Lp.memℒp f)
rw [mem_lpMeasSubgroup_iff_aeStronglyMeasurable']
refine AEStronglyMeasurable'.congr ?_ (Memℒp.coeFn_toLp hf_mem_ℒp).symm
refine aeStronglyMeasurable'_of_aeStronglyMeasurable'_trim hm ?_
exact Lp.aestronglyMeasurable f
|
/-
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.SetTheory.Cardinal.ToNat
import Mathlib.Data.Nat.PartENat
#align_import set_theory.cardinal.basic from "leanprover-community/mathlib"@"3ff3f2d6a3118b8... | Mathlib/SetTheory/Cardinal/PartENat.lean | 108 | 109 | theorem toPartENat_congr {β : Type v} (e : α ≃ β) : toPartENat #α = toPartENat #β := by |
rw [← toPartENat_lift, lift_mk_eq.{_, _,v}.mpr ⟨e⟩, toPartENat_lift]
|
/-
Copyright (c) 2022 Niels Voss. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Niels Voss
-/
import Mathlib.FieldTheory.Finite.Basic
import Mathlib.Order.Filter.Cofinite
#align_import number_theory.fermat_psp from "leanprover-community/mathlib"@"c0439b4877c24a117bfd... | Mathlib/NumberTheory/FermatPsp.lean | 102 | 112 | theorem probablePrime_iff_modEq (n : ℕ) {b : ℕ} (h : 1 ≤ b) :
ProbablePrime n b ↔ b ^ (n - 1) ≡ 1 [MOD n] := by |
have : 1 ≤ b ^ (n - 1) := one_le_pow_of_one_le h (n - 1)
-- For exact mod_cast
rw [Nat.ModEq.comm]
constructor
· intro h₁
apply Nat.modEq_of_dvd
exact mod_cast h₁
· intro h₁
exact mod_cast Nat.ModEq.dvd h₁
|
/-
Copyright (c) 2017 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl
-/
import Mathlib.Data.Bool.Set
import Mathlib.Data.Nat.Set
import Mathlib.Data.Set.Prod
import Mathlib.Data.ULift
import Mathlib.Order.Bounds.Basic
import Mathlib.Order... | Mathlib/Order/CompleteLattice.lean | 1,431 | 1,432 | theorem iSup_pair {f : β → α} {a b : β} : ⨆ x ∈ ({a, b} : Set β), f x = f a ⊔ f b := by |
rw [iSup_insert, iSup_singleton]
|
/-
Copyright (c) 2020 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Anne Baanen
-/
import Mathlib.RingTheory.Algebraic
import Mathlib.RingTheory.Localization.AtPrime
import Mathlib.RingTheory.Localization.Integral
#align_import ring_theory.ideal.over fro... | Mathlib/RingTheory/Ideal/Over.lean | 44 | 48 | theorem coeff_zero_mem_comap_of_root_mem_of_eval_mem {r : S} (hr : r ∈ I) {p : R[X]}
(hp : p.eval₂ f r ∈ I) : p.coeff 0 ∈ I.comap f := by |
rw [← p.divX_mul_X_add, eval₂_add, eval₂_C, eval₂_mul, eval₂_X] at hp
refine mem_comap.mpr ((I.add_mem_iff_right ?_).mp hp)
exact I.mul_mem_left _ hr
|
/-
Copyright (c) 2020 Joseph Myers. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Joseph Myers
-/
import Mathlib.Algebra.Module.BigOperators
import Mathlib.Data.Fintype.BigOperators
import Mathlib.LinearAlgebra.AffineSpace.AffineMap
import Mathlib.LinearAlgebra.Affine... | Mathlib/LinearAlgebra/AffineSpace/Combination.lean | 278 | 279 | theorem weightedVSub_empty (w : ι → k) (p : ι → P) : (∅ : Finset ι).weightedVSub p w = (0 : V) := by |
simp [weightedVSub_apply]
|
/-
Copyright (c) 2020 Scott Morrison. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Markus Himmel, Scott Morrison
-/
import Mathlib.CategoryTheory.Limits.Shapes.ZeroMorphisms
import Mathlib.CategoryTheory.Limits.Shapes.Kernels
import Mathlib.CategoryTheory.Abelian.Bas... | Mathlib/CategoryTheory/Simple.lean | 237 | 248 | theorem simple_of_isSimpleOrder_subobject (X : C) [IsSimpleOrder (Subobject X)] : Simple X := by |
constructor; intros Y f hf; constructor
· intro i
rw [Subobject.isIso_iff_mk_eq_top] at i
intro w
rw [← Subobject.mk_eq_bot_iff_zero] at w
exact IsSimpleOrder.bot_ne_top (w.symm.trans i)
· intro i
rcases IsSimpleOrder.eq_bot_or_eq_top (Subobject.mk f) with (h | h)
· rw [Subobject.mk_eq_bo... |
/-
Copyright (c) 2019 Johan Commelin. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johan Commelin
-/
import Mathlib.LinearAlgebra.FiniteDimensional
import Mathlib.RingTheory.IntegralClosure
import Mathlib.RingTheory.Polynomial.IntegralNormalization
#align_import rin... | Mathlib/RingTheory/Algebraic.lean | 118 | 120 | theorem isAlgebraic_nat [Nontrivial R] (n : ℕ) : IsAlgebraic R (n : A) := by |
rw [← map_natCast (_ : R →+* A) n]
exact isAlgebraic_algebraMap (Nat.cast n)
|
/-
Copyright (c) 2021 Kyle Miller. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Kyle Miller
-/
import Mathlib.Combinatorics.SimpleGraph.Subgraph
import Mathlib.Data.List.Rotate
#align_import combinatorics.simple_graph.connectivity from "leanprover-community/mathlib"... | Mathlib/Combinatorics/SimpleGraph/Connectivity.lean | 1,500 | 1,507 | theorem bypass_isPath {u v : V} (p : G.Walk u v) : p.bypass.IsPath := by |
induction p with
| nil => simp!
| cons _ p' ih =>
simp only [bypass]
split_ifs with hs
· exact ih.dropUntil hs
· simp [*, cons_isPath_iff]
|
/-
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.Algebra.Group.Nat
import Mathlib.Algebra.Order.Sub.Canonical
import Mathlib.Data.List.Perm
import Mathlib.Data.Set.List
import Mathlib.Init.Quot... | Mathlib/Data/Multiset/Basic.lean | 478 | 479 | theorem toList_eq_nil {s : Multiset α} : s.toList = [] ↔ s = 0 := by |
rw [← coe_eq_zero, coe_toList]
|
/-
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, Patrick Massot
-/
import Mathlib.GroupTheory.GroupAction.ConjAct
import Mathlib.GroupTheory.GroupAction.Quotient
import Mathlib.GroupTheory.QuotientGrou... | Mathlib/Topology/Algebra/Group/Basic.lean | 971 | 980 | theorem TopologicalGroup.of_nhds_one {G : Type u} [Group G] [TopologicalSpace G]
(hmul : Tendsto (uncurry ((· * ·) : G → G → G)) (𝓝 1 ×ˢ 𝓝 1) (𝓝 1))
(hinv : Tendsto (fun x : G => x⁻¹) (𝓝 1) (𝓝 1))
(hleft : ∀ x₀ : G, 𝓝 x₀ = map (x₀ * ·) (𝓝 1))
(hconj : ∀ x₀ : G, Tendsto (x₀ * · * x₀⁻¹) (𝓝 1) (𝓝 ... |
refine TopologicalGroup.of_nhds_one' hmul hinv hleft fun x₀ => ?_
replace hconj : ∀ x₀ : G, map (x₀ * · * x₀⁻¹) (𝓝 1) = 𝓝 1 :=
fun x₀ => map_eq_of_inverse (x₀⁻¹ * · * x₀⁻¹⁻¹) (by ext; simp [mul_assoc]) (hconj _) (hconj _)
rw [← hconj x₀]
simpa [(· ∘ ·)] using hleft _
|
/-
Copyright (c) 2024 Mitchell Lee. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mitchell Lee
-/
import Mathlib.GroupTheory.Coxeter.Length
import Mathlib.Data.ZMod.Parity
/-!
# Reflections, inversions, and inversion sequences
Throughout this file, `B` is a type and... | Mathlib/GroupTheory/Coxeter/Inversion.lean | 372 | 375 | theorem prod_rightInvSeq (ω : List B) : prod (ris ω) = (π ω)⁻¹ := by |
induction' ω with i ω ih
· simp
· simp [rightInvSeq, ih, wordProd_cons]
|
/-
Copyright (c) 2024 Mitchell Lee. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mitchell Lee
-/
import Mathlib.GroupTheory.Coxeter.Length
import Mathlib.Data.ZMod.Parity
/-!
# Reflections, inversions, and inversion sequences
Throughout this file, `B` is a type and... | Mathlib/GroupTheory/Coxeter/Inversion.lean | 231 | 233 | theorem leftInvSeq_reverse (ω : List B) :
lis (ω.reverse) = (ris ω).reverse := by |
simp [leftInvSeq_eq_reverse_rightInvSeq_reverse]
|
/-
Copyright (c) 2023 Yury Kudryashov. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Yury Kudryashov
-/
import Mathlib.Topology.Order.Basic
/-!
# Set neighborhoods of intervals
In this file we prove basic theorems about `𝓝ˢ s`,
where `s` is one of the intervals
`Se... | Mathlib/Topology/Order/NhdsSet.lean | 169 | 174 | theorem hasBasis_nhdsSet_Iic_Iio (a : α) [h : Nonempty (Ioi a)] :
HasBasis (𝓝ˢ (Iic a)) (a < ·) Iio := by |
refine ⟨fun s ↦ ⟨fun hs ↦ ?_, fun ⟨b, hab, hb⟩ ↦ mem_of_superset (Iio_mem_nhdsSet_Iic hab) hb⟩⟩
rw [nhdsSet_Iic, mem_sup, mem_principal] at hs
rcases exists_Ico_subset_of_mem_nhds hs.1 (Set.nonempty_coe_sort.1 h) with ⟨b, hab, hbs⟩
exact ⟨b, hab, Iio_subset_Iio_union_Ico.trans (union_subset hs.2 hbs)⟩
|
/-
Copyright (c) 2022 Andrew Yang. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Andrew Yang
-/
import Mathlib.RingTheory.PrincipalIdealDomain
#align_import ring_theory.bezout from "leanprover-community/mathlib"@"6623e6af705e97002a9054c1c05a980180276fc1"
/-!
# Bézo... | Mathlib/RingTheory/Bezout.lean | 42 | 50 | theorem _root_.Function.Surjective.isBezout {S : Type v} [CommRing S] (f : R →+* S)
(hf : Function.Surjective f) [IsBezout R] : IsBezout S := by |
rw [iff_span_pair_isPrincipal]
intro x y
obtain ⟨⟨x, rfl⟩, ⟨y, rfl⟩⟩ := hf x, hf y
use f (gcd x y)
trans Ideal.map f (Ideal.span {gcd x y})
· rw [span_gcd, Ideal.map_span, Set.image_insert_eq, Set.image_singleton]
· rw [Ideal.map_span, Set.image_singleton]; rfl
|
/-
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.MeasureTheory.Integral.IntervalIntegral
import Mathlib.Analysis.Calculus.Deriv.ZPow
import Mathlib.Analysis.NormedSpace.Pointwise
import Mathlib.Anal... | Mathlib/MeasureTheory/Integral/CircleIntegral.lean | 533 | 538 | theorem cauchyPowerSeries_apply (f : ℂ → E) (c : ℂ) (R : ℝ) (n : ℕ) (w : ℂ) :
(cauchyPowerSeries f c R n fun _ => w) =
(2 * π * I : ℂ)⁻¹ • ∮ z in C(c, R), (w / (z - c)) ^ n • (z - c)⁻¹ • f z := by |
simp only [cauchyPowerSeries, ContinuousMultilinearMap.mkPiRing_apply, Fin.prod_const,
div_eq_mul_inv, mul_pow, mul_smul, circleIntegral.integral_smul]
rw [← smul_comm (w ^ n)]
|
/-
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.Asymptotics
#align_import... | Mathlib/Analysis/SpecialFunctions/Pow/Continuity.lean | 431 | 437 | theorem eventually_pow_one_div_le (x : ℝ≥0) {y : ℝ≥0} (hy : 1 < y) :
∀ᶠ n : ℕ in atTop, x ^ (1 / n : ℝ) ≤ y := by |
obtain ⟨m, hm⟩ := add_one_pow_unbounded_of_pos x (tsub_pos_of_lt hy)
rw [tsub_add_cancel_of_le hy.le] at hm
refine eventually_atTop.2 ⟨m + 1, fun n hn => ?_⟩
simpa only [NNReal.rpow_one_div_le_iff (Nat.cast_pos.2 <| m.succ_pos.trans_le hn),
NNReal.rpow_natCast] using hm.le.trans (pow_le_pow_right hy.le (m.... |
/-
Copyright (c) 2018 Kenny Lau. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Kenny Lau, Yury Kudryashov
-/
import Mathlib.Algebra.Algebra.Defs
import Mathlib.Algebra.Algebra.NonUnitalHom
import Mathlib.Algebra.GroupPower.IterateHom
import Mathlib.LinearAlgebra.Tenso... | Mathlib/Algebra/Algebra/Bilinear.lean | 236 | 237 | theorem pow_mulLeft (a : A) (n : ℕ) : mulLeft R a ^ n = mulLeft R (a ^ n) := by |
simpa only [mulLeft, ← Algebra.coe_lmul_eq_mul] using ((Algebra.lmul R A).map_pow a n).symm
|
/-
Copyright (c) 2022 Sebastian Monnet. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Sebastian Monnet
-/
import Mathlib.FieldTheory.Galois
import Mathlib.Topology.Algebra.FilterBasis
import Mathlib.Topology.Algebra.OpenSubgroup
import Mathlib.Tactic.ByContra
#align_... | Mathlib/FieldTheory/KrullTopology.lean | 124 | 127 | theorem IntermediateField.fixingSubgroup.antimono {K L : Type*} [Field K] [Field L] [Algebra K L]
{E1 E2 : IntermediateField K L} (h12 : E1 ≤ E2) : E2.fixingSubgroup ≤ E1.fixingSubgroup := by |
rintro σ hσ ⟨x, hx⟩
exact hσ ⟨x, h12 hx⟩
|
/-
Copyright (c) 2017 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl
-/
import Mathlib.Algebra.Group.Indicator
import Mathlib.Data.Finset.Piecewise
import Mathlib.Data.Finset.Preimage
#align_import algebra.big_operators.basic from "leanp... | Mathlib/Algebra/BigOperators/Group/Finset.lean | 1,159 | 1,168 | theorem prod_congr_set {α : Type*} [CommMonoid α] {β : Type*} [Fintype β] (s : Set β)
[DecidablePred (· ∈ s)] (f : β → α) (g : s → α) (w : ∀ (x : β) (h : x ∈ s), f x = g ⟨x, h⟩)
(w' : ∀ x : β, x ∉ s → f x = 1) : Finset.univ.prod f = Finset.univ.prod g := by |
rw [← @Finset.prod_subset _ _ s.toFinset Finset.univ f _ (by simp)]
· rw [Finset.prod_subtype]
· apply Finset.prod_congr rfl
exact fun ⟨x, h⟩ _ => w x h
· simp
· rintro x _ h
exact w' x (by simpa using h)
|
/-
Copyright (c) 2019 Amelia Livingston. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Amelia Livingston, Bryan Gin-ge Chen, Patrick Massot, Wen Yang, Johan Commelin
-/
import Mathlib.Data.Set.Finite
import Mathlib.Order.Partition.Finpartition
#align_import data.seto... | Mathlib/Data/Setoid/Partition.lean | 78 | 81 | theorem card_classes_ker_le {α β : Type*} [Fintype β] (f : α → β)
[Fintype (Setoid.ker f).classes] : Fintype.card (Setoid.ker f).classes ≤ Fintype.card β := by |
classical exact
le_trans (Set.card_le_card (classes_ker_subset_fiber_set f)) (Fintype.card_range_le _)
|
/-
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, Scott Morrison, Jens Wagemaker, Johan Commelin
-/
import Mathlib.Algebra.Polynomial.AlgebraMap
import Mathlib.Algebra.Polynomial.BigOperators
import Mathlib... | Mathlib/Algebra/Polynomial/RingDivision.lean | 198 | 203 | theorem natDegree_eq_zero_of_isUnit (h : IsUnit p) : natDegree p = 0 := by |
nontriviality R
obtain ⟨q, hq⟩ := h.exists_right_inv
have := natDegree_mul (left_ne_zero_of_mul_eq_one hq) (right_ne_zero_of_mul_eq_one hq)
rw [hq, natDegree_one, eq_comm, add_eq_zero_iff] at this
exact this.1
|
/-
Copyright (c) 2020 Yury Kudryashov. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Yury Kudryashov, Johannes Hölzl, Mario Carneiro, Patrick Massot
-/
import Mathlib.Data.Prod.PProd
import Mathlib.Data.Set.Countable
import Mathlib.Order.Filter.Prod
import Mathlib.Ord... | Mathlib/Order/Filter/Bases.lean | 477 | 479 | theorem HasBasis.le_basis_iff (hl : l.HasBasis p s) (hl' : l'.HasBasis p' s') :
l ≤ l' ↔ ∀ i', p' i' → ∃ i, p i ∧ s i ⊆ s' i' := by |
simp only [hl'.ge_iff, hl.mem_iff]
|
/-
Copyright (c) 2019 Gabriel Ebner. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Gabriel Ebner, Sébastien Gouëzel
-/
import Mathlib.Analysis.Calculus.FDeriv.Basic
import Mathlib.Analysis.NormedSpace.OperatorNorm.NormedSpace
#align_import analysis.calculus.deriv.bas... | Mathlib/Analysis/Calculus/Deriv/Basic.lean | 474 | 475 | theorem norm_derivWithin_eq_norm_fderivWithin : ‖derivWithin f s x‖ = ‖fderivWithin 𝕜 f s x‖ := by |
simp [← derivWithin_fderivWithin]
|
/-
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, Yaël Dillies
-/
import Mathlib.Analysis.Normed.Group.Seminorm
import Mathlib.Order.LiminfLimsup
import Mathlib.Topology.Instances.Rat
import Mathlib.Top... | Mathlib/Analysis/Normed/Group/Basic.lean | 782 | 782 | theorem mem_sphere_one_iff_norm : a ∈ sphere (1 : E) r ↔ ‖a‖ = r := by | simp [dist_eq_norm_div]
|
/-
Copyright (c) 2022 Andrew Yang. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Andrew Yang
-/
import Mathlib.RingTheory.Kaehler
import Mathlib.RingTheory.Unramified.Basic
/-!
# Differential properties of formally unramified algebras
We show that `R`-algebra `A` i... | Mathlib/RingTheory/Unramified/Derivations.lean | 35 | 47 | theorem FormallyUnramified.iff_subsingleton_kaehlerDifferential :
FormallyUnramified R S ↔ Subsingleton (Ω[S⁄R]) := by |
constructor
· intros; infer_instance
· intro H
constructor
intro B _ _ I hI f₁ f₂ e
letI := f₁.toRingHom.toAlgebra
haveI := IsScalarTower.of_algebraMap_eq' f₁.comp_algebraMap.symm
have :=
((KaehlerDifferential.linearMapEquivDerivation R S).toEquiv.trans
(derivationToSquareZe... |
/-
Copyright (c) 2020 Anne Baanen. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Anne Baanen
-/
import Mathlib.FieldTheory.Minpoly.Field
#align_import ring_theory.power_basis from "leanprover-community/mathlib"@"d1d69e99ed34c95266668af4e288fc1c598b9a7f"
/-!
# Power ... | Mathlib/RingTheory/PowerBasis.lean | 138 | 142 | theorem algHom_ext {S' : Type*} [Semiring S'] [Algebra R S'] (pb : PowerBasis R S)
⦃f g : S →ₐ[R] S'⦄ (h : f pb.gen = g pb.gen) : f = g := by |
ext x
obtain ⟨f, rfl⟩ := pb.exists_eq_aeval' x
rw [← Polynomial.aeval_algHom_apply, ← Polynomial.aeval_algHom_apply, h]
|
/-
Copyright (c) 2019 Johannes Hölzl. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johannes Hölzl, Patrick Massot, Casper Putz, Anne Baanen
-/
import Mathlib.LinearAlgebra.Matrix.Reindex
import Mathlib.LinearAlgebra.Matrix.ToLin
#align_import linear_algebra.matrix.b... | Mathlib/LinearAlgebra/Matrix/Basis.lean | 124 | 128 | theorem toMatrix_map_vecMul {S : Type*} [Ring S] [Algebra R S] [Fintype ι] (b : Basis ι R S)
(v : ι' → S) : b ᵥ* ((b.toMatrix v).map <| algebraMap R S) = v := by |
ext i
simp_rw [vecMul, dotProduct, Matrix.map_apply, ← Algebra.commutes, ← Algebra.smul_def,
sum_toMatrix_smul_self]
|
/-
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.Cardinal.Ordinal
import Mathlib.SetTheory.Ordinal.FixedPoint
#align_import set_theory.cardinal... | Mathlib/SetTheory/Cardinal/Cofinality.lean | 793 | 798 | theorem unbounded_of_unbounded_iUnion {α β : Type u} (r : α → α → Prop) [wo : IsWellOrder α r]
(s : β → Set α) (h₁ : Unbounded r <| ⋃ x, s x) (h₂ : #β < StrictOrder.cof r) :
∃ x : β, Unbounded r (s x) := by |
rw [← sUnion_range] at h₁
rcases unbounded_of_unbounded_sUnion r h₁ (mk_range_le.trans_lt h₂) with ⟨_, ⟨x, rfl⟩, u⟩
exact ⟨x, u⟩
|
/-
Copyright (c) 2018 Mario Carneiro. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Mario Carneiro, Sean Leather
-/
import Mathlib.Data.List.Range
import Mathlib.Data.List.Perm
#align_import data.list.sigma from "leanprover-community/mathlib"@"f808feb6c18afddb25e66a7... | Mathlib/Data/List/Sigma.lean | 560 | 565 | theorem sizeOf_kerase [DecidableEq α] [SizeOf (Sigma β)] (x : α)
(xs : List (Sigma β)) : SizeOf.sizeOf (List.kerase x xs) ≤ SizeOf.sizeOf xs := by |
simp only [SizeOf.sizeOf, _sizeOf_1]
induction' xs with y ys
· simp
· by_cases x = y.1 <;> simp [*]
|
/-
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.Cardinal.Ordinal
import Mathlib.SetTheory.Ordinal.FixedPoint
#align_import set_theory.cardinal... | Mathlib/SetTheory/Cardinal/Cofinality.lean | 180 | 213 | theorem ord_cof_eq (r : α → α → Prop) [IsWellOrder α r] :
∃ S, Unbounded r S ∧ type (Subrel r S) = (cof (type r)).ord := by |
let ⟨S, hS, e⟩ := cof_eq r
let ⟨s, _, e'⟩ := Cardinal.ord_eq S
let T : Set α := { a | ∃ aS : a ∈ S, ∀ b : S, s b ⟨_, aS⟩ → r b a }
suffices Unbounded r T by
refine ⟨T, this, le_antisymm ?_ (Cardinal.ord_le.2 <| cof_type_le this)⟩
rw [← e, e']
refine
(RelEmbedding.ofMonotone
(fun a :... |
/-
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.Algebra.QuadraticDiscriminant
import Mathlib.Analysis.Convex.SpecificFunctions.Deriv
imp... | Mathlib/Analysis/SpecialFunctions/Trigonometric/Complex.lean | 195 | 207 | theorem cos_surjective : Function.Surjective cos := by |
intro x
obtain ⟨w, w₀, hw⟩ : ∃ w ≠ 0, 1 * w * w + -2 * x * w + 1 = 0 := by
rcases exists_quadratic_eq_zero one_ne_zero
⟨_, (cpow_nat_inv_pow _ two_ne_zero).symm.trans <| pow_two _⟩ with
⟨w, hw⟩
refine ⟨w, ?_, hw⟩
rintro rfl
simp only [zero_add, one_ne_zero, mul_zero] at hw
refine ⟨l... |
/-
Copyright (c) 2021 Ivan Sadofschi Costa. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Ivan Sadofschi Costa
-/
import Mathlib.Data.Finsupp.Defs
#align_import data.finsupp.fin from "leanprover-community/mathlib"@"f7fc89d5d5ff1db2d1242c7bb0e9062ce47ef47c"
/-!
# `co... | Mathlib/Data/Finsupp/Fin.lean | 78 | 80 | theorem cons_ne_zero_of_left (h : y ≠ 0) : cons y s ≠ 0 := by |
contrapose! h with c
rw [← cons_zero y s, c, Finsupp.coe_zero, Pi.zero_apply]
|
/-
Copyright (c) 2019 Floris van Doorn. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Floris van Doorn, Yury Kudryashov, Sébastien Gouëzel, Chris Hughes
-/
import Mathlib.Algebra.Group.Basic
import Mathlib.Algebra.Group.Pi.Basic
import Mathlib.Order.Fin
import Mathlib... | Mathlib/Data/Fin/Tuple/Basic.lean | 500 | 502 | theorem snoc_castSucc : snoc p x (castSucc i) = p i := by |
simp only [snoc, coe_castSucc, is_lt, cast_eq, dite_true]
convert cast_eq rfl (p i)
|
/-
Copyright (c) 2022 Violeta Hernández Palacios. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Violeta Hernández Palacios
-/
import Mathlib.SetTheory.Ordinal.Arithmetic
import Mathlib.Tactic.Abel
#align_import set_theory.ordinal.natural_ops from "leanprover-communit... | Mathlib/SetTheory/Ordinal/NaturalOps.lean | 802 | 802 | theorem succ_nmul (a b) : succ a ⨳ b = a ⨳ b ♯ b := by | rw [← nadd_one, nadd_one_nmul]
|
/-
Copyright (c) 2021 Aaron Anderson, Jesse Michael Han, Floris van Doorn. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Aaron Anderson, Jesse Michael Han, Floris van Doorn
-/
import Mathlib.Data.Finset.Basic
import Mathlib.ModelTheory.Syntax
import Mathlib.Data.List.... | Mathlib/ModelTheory/Semantics.lean | 706 | 709 | theorem LHom.setOf_realize_onFormula [L'.Structure M] (φ : L →ᴸ L') [φ.IsExpansionOn M]
(ψ : L.Formula α) : (setOf (φ.onFormula ψ).Realize : Set (α → M)) = setOf ψ.Realize := by |
ext
simp
|
/-
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.Constructions.Prod.Basic
import Mathlib.MeasureTheory.Group.Measure
import Mathlib.Topology.Constructions
#align_import measure_theo... | Mathlib/MeasureTheory/Constructions/Pi.lean | 166 | 174 | theorem piPremeasure_pi' {s : ∀ i, Set (α i)} : piPremeasure m (pi univ s) = ∏ i, m i (s i) := by |
cases isEmpty_or_nonempty ι
· simp [piPremeasure]
rcases (pi univ s).eq_empty_or_nonempty with h | h
· rcases univ_pi_eq_empty_iff.mp h with ⟨i, hi⟩
have : ∃ i, m i (s i) = 0 := ⟨i, by simp [hi]⟩
simpa [h, Finset.card_univ, zero_pow Fintype.card_ne_zero, @eq_comm _ (0 : ℝ≥0∞),
Finset.prod_eq_zero... |
/-
Copyright (c) 2021 Johan Commelin. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Johan Commelin
-/
import Mathlib.Analysis.Normed.Group.Basic
#align_import analysis.normed.group.hom from "leanprover-community/mathlib"@"3c4225288b55380a90df078ebae0991080b12393"
/-... | Mathlib/Analysis/Normed/Group/Hom.lean | 190 | 195 | theorem SurjectiveOnWith.exists_pos {f : NormedAddGroupHom V₁ V₂} {K : AddSubgroup V₂} {C : ℝ}
(h : f.SurjectiveOnWith K C) : ∃ C' > 0, f.SurjectiveOnWith K C' := by |
refine ⟨|C| + 1, ?_, ?_⟩
· linarith [abs_nonneg C]
· apply h.mono
linarith [le_abs_self C]
|
/-
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, Kevin Buzzard, Yury Kudryashov, Eric Wieser
-/
import Mathlib.Algebra.Algebra.Prod
import Mathlib.LinearAlgebra.Basic
import Mathlib.LinearAlgebra.Span
... | Mathlib/LinearAlgebra/Prod.lean | 581 | 582 | theorem prod_map_snd : (prod p q).map (snd R M M₂) = q := by |
ext x; simp [(⟨0, zero_mem _⟩ : ∃ x, x ∈ p)]
|
/-
Copyright (c) 2021 Sébastien Gouëzel. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Sébastien Gouëzel
-/
import Mathlib.Analysis.Analytic.Composition
#align_import analysis.analytic.inverse from "leanprover-community/mathlib"@"284fdd2962e67d2932fa3a79ce19fcf92d38e... | Mathlib/Analysis/Analytic/Inverse.lean | 73 | 74 | theorem leftInv_coeff_one (p : FormalMultilinearSeries 𝕜 E F) (i : E ≃L[𝕜] F) :
p.leftInv i 1 = (continuousMultilinearCurryFin1 𝕜 F E).symm i.symm := by | rw [leftInv]
|
/-
Copyright (c) 2021 Yury G. Kudryashov. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Yury G. Kudryashov, Alex Kontorovich
-/
import Mathlib.Order.Filter.Bases
#align_import order.filter.pi from "leanprover-community/mathlib"@"ce64cd319bb6b3e82f31c2d38e79080d377be4... | Mathlib/Order/Filter/Pi.lean | 142 | 153 | theorem pi_inf_principal_univ_pi_eq_bot :
pi f ⊓ 𝓟 (Set.pi univ s) = ⊥ ↔ ∃ i, f i ⊓ 𝓟 (s i) = ⊥ := by |
constructor
· simp only [inf_principal_eq_bot, mem_pi]
contrapose!
rintro (hsf : ∀ i, ∃ᶠ x in f i, x ∈ s i) I - t htf hts
have : ∀ i, (s i ∩ t i).Nonempty := fun i => ((hsf i).and_eventually (htf i)).exists
choose x hxs hxt using this
exact hts (fun i _ => hxt i) (mem_univ_pi.2 hxs)
· simp on... |
/-
Copyright (c) 2021 Adam Topaz. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Adam Topaz
-/
import Mathlib.CategoryTheory.Sites.Plus
import Mathlib.CategoryTheory.Limits.Shapes.ConcreteCategory
#align_import category_theory.sites.sheafification from "leanprover-com... | Mathlib/CategoryTheory/Sites/ConcreteSheafification.lean | 446 | 449 | theorem isSheaf_plus_plus (P : Cᵒᵖ ⥤ D) : Presheaf.IsSheaf J (J.plusObj (J.plusObj P)) := by |
apply isSheaf_of_sep
intro X S x y
apply sep
|
/-
Copyright (c) 2020 Aaron Anderson, Jalex Stark, Kyle Miller. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Aaron Anderson, Jalex Stark, Kyle Miller, Alena Gusakov
-/
import Mathlib.Algebra.Order.Ring.Defs
import Mathlib.Combinatorics.SimpleGraph.Basic
import Mathli... | Mathlib/Combinatorics/SimpleGraph/Finite.lean | 341 | 343 | theorem complete_graph_degree [DecidableEq V] (v : V) :
(⊤ : SimpleGraph V).degree v = Fintype.card V - 1 := by |
erw [degree, neighborFinset_eq_filter, filter_ne, card_erase_of_mem (mem_univ v), card_univ]
|
/-
Copyright (c) 2022 Scott Morrison. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Scott Morrison, Joël Riou
-/
import Mathlib.CategoryTheory.CommSq
import Mathlib.CategoryTheory.Limits.Opposites
import Mathlib.CategoryTheory.Limits.Shapes.Biproducts
import Mathlib.C... | Mathlib/CategoryTheory/Limits/Shapes/CommSq.lean | 1,049 | 1,056 | theorem IsPushout.of_map [ReflectsColimit (span f g) F] (e : f ≫ h = g ≫ i)
(H : IsPushout (F.map f) (F.map g) (F.map h) (F.map i)) : IsPushout f g h i := by |
refine ⟨⟨e⟩, ⟨isColimitOfReflects F <| ?_⟩⟩
refine
(IsColimit.equivOfNatIsoOfIso (spanCompIso F f g) _ _ (WalkingSpan.ext ?_ ?_ ?_)).symm
H.isColimit
exacts [Iso.refl _, (Category.comp_id _).trans (Category.id_comp _),
(Category.comp_id _).trans (Category.id_comp _)]
|
/-
Copyright (c) 2023 Matthew Robert Ballard. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Matthew Robert Ballard
-/
import Mathlib.Algebra.Divisibility.Units
import Mathlib.Algebra.Order.Ring.Nat
import Mathlib.Tactic.Common
/-!
# The maximal power of one natural n... | Mathlib/Data/Nat/MaxPowDiv.lean | 57 | 60 | theorem zero_base {n : ℕ} : maxPowDiv 0 n = 0 := by |
dsimp [maxPowDiv]
rw [maxPowDiv.go]
simp
|
/-
Copyright (c) 2021 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.Adapted
import Mathlib.MeasureTheory.Constructions.BorelSpace.Order
#align_import probability.process.stopping from "leanp... | Mathlib/Probability/Process/Stopping.lean | 908 | 928 | theorem stoppedProcess_eq_of_mem_finset [LinearOrder ι] [AddCommMonoid E] {s : Finset ι} (n : ι)
(hbdd : ∀ ω, τ ω < n → τ ω ∈ s) : stoppedProcess u τ n = Set.indicator {a | n ≤ τ a} (u n) +
∑ i ∈ s.filter (· < n), Set.indicator {ω | τ ω = i} (u i) := by |
ext ω
rw [Pi.add_apply, Finset.sum_apply]
rcases le_or_lt n (τ ω) with h | h
· rw [stoppedProcess_eq_of_le h, Set.indicator_of_mem, Finset.sum_eq_zero, add_zero]
· intro m hm
refine Set.indicator_of_not_mem ?_ _
rw [Finset.mem_filter] at hm
exact (hm.2.trans_le h).ne'
· exact h
· rw... |
/-
Copyright (c) 2022 Joseph Myers. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Joseph Myers
-/
import Mathlib.Algebra.CharP.Invertible
import Mathlib.Algebra.Order.Interval.Set.Group
import Mathlib.Analysis.Convex.Segment
import Mathlib.LinearAlgebra.AffineSpace.Fi... | Mathlib/Analysis/Convex/Between.lean | 231 | 234 | theorem sbtw_vsub_const_iff {x y z : P} (p : P) :
Sbtw R (x -ᵥ p) (y -ᵥ p) (z -ᵥ p) ↔ Sbtw R x y z := by |
rw [Sbtw, Sbtw, wbtw_vsub_const_iff, (vsub_left_injective p).ne_iff,
(vsub_left_injective p).ne_iff]
|
/-
Copyright (c) 2014 Robert Lewis. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.
Authors: Robert Lewis, Leonardo de Moura, Mario Carneiro, Floris van Doorn
-/
import Mathlib.Algebra.Field.Basic
import Mathlib.Algebra.GroupWithZero.Units.Equiv
import Mathlib.Algebra.Order.Fiel... | Mathlib/Algebra/Order/Field/Basic.lean | 512 | 516 | theorem exists_pos_mul_lt {a : α} (h : 0 < a) (b : α) : ∃ c : α, 0 < c ∧ b * c < a := by |
have : 0 < a / max (b + 1) 1 := div_pos h (lt_max_iff.2 (Or.inr zero_lt_one))
refine ⟨a / max (b + 1) 1, this, ?_⟩
rw [← lt_div_iff this, div_div_cancel' h.ne']
exact lt_max_iff.2 (Or.inl <| lt_add_one _)
|
/-
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, Sébastien Gouëzel, Rémy Degenne
-/
import Mathlib.MeasureTheory.Integral.SetToL1
#align_import measure_theory.integral.bochner from "leanprover-communit... | Mathlib/MeasureTheory/Integral/Bochner.lean | 1,755 | 1,761 | theorem integral_dirac' [MeasurableSpace α] (f : α → E) (a : α) (hfm : StronglyMeasurable f) :
∫ x, f x ∂Measure.dirac a = f a := by |
borelize E
calc
∫ x, f x ∂Measure.dirac a = ∫ _, f a ∂Measure.dirac a :=
integral_congr_ae <| ae_eq_dirac' hfm.measurable
_ = f a := by simp [Measure.dirac_apply_of_mem]
|
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