mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Topology.ContinuousMap.Ideals

Goal state before:
pp: X : Type u_1
R : Type u_2
inst✝⁴ : TopologicalSpace X
inst✝³ : Semiring R
inst✝² : TopologicalSpace R
inst✝¹ : IsTopologicalSemiring R
inst✝ : T2Space R
I : Ideal C(X, R)
⊢ IsOpen (setOfIdeal I)

Tactic:
simp only [setOfIdeal, Set.ofPred_forall, isOpen_compl_iff]

Goal state after:
X : Type u_1
R : Type u_2
inst✝⁴ : TopologicalSpace X
inst✝³ : Semiring R
inst✝² : TopologicalSpace R
inst✝¹ : IsTopologicalSemiring R
inst✝ : T2Space R
I : Ideal C(X, R)
⊢ IsClosed (⋂ i ∈ I, {x | i x = 0})
Module: Mathlib.Topology.ContinuousMap.Ideals

Goal state before:
pp: X : Type u_1
𝕜 : Type u_2
inst✝³ : RCLike 𝕜
inst✝² : TopologicalSpace X
inst✝¹ : CompactSpace X
inst✝ : T2Space X
I : Ideal C(X, 𝕜)
f : C(X, 𝕜)
hf : f ∈ idealOfSet 𝕜 (setOfIdeal I)
ε : ℝ≥0
hε : 0 < ε
t : Set X := {x | ε / 2 ≤ ‖f x‖₊}
ht : IsClosed t
htI : Disjoint t (setOfIdeal I)ᶜ
g' : C(X, ℝ≥0)
hI' : (↑(algebraMapCLM ℝ≥0 𝕜)).comp g' ∈ I
hgt' : ∀ x ∈ t, 0 < g' x
c : ℝ≥0
hc : c > 0
hgc' : t ⊆ {y | c ≤ g' y}
g : C(X, ℝ≥0)
hg : ∀ (x : X), (g * g') x ≤ 1
hgc : Set.EqOn (⇑(g * g')) 1 {x | c ≤ g' x}
⊢ (↑(algebraMapCLM ℝ≥0 𝕜)).comp (g * g') ∈ I

Tactic:
convert! I.mul_mem_left ((algebraMapCLM ℝ≥0 𝕜 : C(ℝ≥0, 𝕜)).comp g) hI'

Goal state after:
X : Type u_1
𝕜 : Type u_2
inst✝³ : RCLike 𝕜
inst✝² : TopologicalSpace X
inst✝¹ : CompactSpace X
inst✝ : T2Space X
I : Ideal C(X, 𝕜)
f : C(X, 𝕜)
hf : f ∈ idealOfSet 𝕜 (setOfIdeal I)
ε : ℝ≥0
hε : 0 < ε
t : Set X := {x | ε / 2 ≤ ‖f x‖₊}
ht : IsClosed t
htI : Disjoint t (setOfIdeal I)ᶜ
g' : C(X, ℝ≥0)
hI' : (↑(algebraMapCLM ℝ≥0 𝕜)).comp g' ∈ I
hgt' : ∀ x ∈ t, 0 < g' x
c : ℝ≥0
hc : c > 0
hgc' : t ⊆ {y | c ≤ g' y}
g : C(X, ℝ≥0)
hg : ∀ (x : X), (g * g') x ≤ 1
hgc : Set.EqOn (⇑(g * g')) 1 {x | c ≤ g' x}
⊢ (↑(algebraMapCLM ℝ≥0 𝕜)).comp (g * g') = (↑(algebraMapCLM ℝ≥0 𝕜)).comp g * (↑(algebraMapCLM ℝ≥0 𝕜)).comp g'
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.PosPart.Basic

Goal state before:
pp: A : Type u_1
inst✝⁹ : NonUnitalRing A
inst✝⁸ : Module ℝ A
inst✝⁷ : SMulCommClass ℝ A A
inst✝⁶ : IsScalarTower ℝ A A
inst✝⁵ : StarRing A
inst✝⁴ : TopologicalSpace A
inst✝³ : NonUnitalContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : PartialOrder A
inst✝¹ : StarOrderedRing A
inst✝ : NonnegSpectrumClass ℝ A
a : A
ha : 0 ≤ a
x : ℝ
hx : x ∈ quasispectrum ℝ a
⊢ x⁺ = id x

Tactic:
simpa [_root_.posPart_def] using quasispectrum_nonneg_of_nonneg a ha x hx

Goal state after:
Module: Mathlib.Topology.MetricSpace.UniformConvergence

Goal state before:
pp: α : Type u_1
β : Type u_2
𝔖 : Set (Set α)
inst✝¹ : PseudoEMetricSpace β
inst✝ : Fintype ↑𝔖
f g : α →ᵤ[𝔖] β
⊢ edist f g =
    edist (fun s ↦ UniformFun.ofFun ((↑s).domRestrict ((toFun 𝔖) f))) fun s ↦
      UniformFun.ofFun ((↑s).domRestrict ((toFun 𝔖) g))

Tactic:
by
  simp_rw [edist_def', iSup_subtype', edist_pi_def, Finset.sup_univ_eq_iSup]
  rfl

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: case refine_4
A : Type u_1
inst✝¹ : CStarAlgebra A
a : A
inst✝ : IsStarNormal a
z : ℂ
hz : z ∈ spectrum ℂ a
hz' : z ∈ spectrum ℂ ⟨a, ⋯⟩
⊢ ∃ a_1, characterSpaceToSpectrum a a_1 = ⟨z, hz⟩

Tactic:
rw [CharacterSpace.mem_spectrum_iff_exists] at hz'

Goal state after:
case refine_4
A : Type u_1
inst✝¹ : CStarAlgebra A
a : A
inst✝ : IsStarNormal a
z : ℂ
hz : z ∈ spectrum ℂ a
hz' : ∃ f, f ⟨a, ⋯⟩ = z
⊢ ∃ a_1, characterSpaceToSpectrum a a_1 = ⟨z, hz⟩
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: case hom_map_spectrum
A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsStarNormal a
this : Isometry ⇑((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a))
⊢ ∀ (f : C(↑(spectrum ℂ a), ℂ)),
    spectrum ℂ (((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a)) f) = Set.range ⇑f

pp: case predicate_hom
A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsStarNormal a
this : Isometry ⇑((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a))
⊢ ∀ (f : C(↑(spectrum ℂ a), ℂ)), IsStarNormal (((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a)) f)

Tactic:
case hom_map_spectrum =>
      intro f
      simp only [StarAlgHom.comp_apply, StarAlgHom.coe_coe, StarSubalgebra.coe_subtype]
      rw [← StarSubalgebra.spectrum_eq (hS := StarAlgebra.elemental.isClosed ℂ a),
        AlgEquiv.spectrum_eq (continuousFunctionalCalculus a), ContinuousMap.spectrum_eq_range]

Goal state after:
case predicate_hom
A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsStarNormal a
this : Isometry ⇑((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a))
⊢ ∀ (f : C(↑(spectrum ℂ a), ℂ)), IsStarNormal (((elemental ℂ a).subtype.comp ↑(continuousFunctionalCalculus a)) f)
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsSelfAdjoint a
⊢ ∀ x ∈ spectrum ℝ (cfc id a ^ 2), 0 ≤ x

Tactic:
← cfc_pow ..,

Goal state after:
A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsSelfAdjoint a
⊢ ∀ x ∈ spectrum ℝ (cfc (fun x ↦ id x ^ 2) a), 0 ≤ x
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsSelfAdjoint a
ha₁ : ∀ x ∈ spectrum ℝ a, 0 ≤ x
ha₂ : ∀ x ∈ spectrum ℝ (-a), 0 ≤ x
⊢ spectrum ℝ a ⊆ {0}

Tactic:
Set.subset_singleton_iff

Goal state after:
A : Type u_1
inst✝ : CStarAlgebra A
a : A
ha : IsSelfAdjoint a
ha₁ : ∀ x ∈ spectrum ℝ a, 0 ≤ x
ha₂ : ∀ x ∈ spectrum ℝ (-a), 0 ≤ x
⊢ ∀ y ∈ spectrum ℝ a, y = 0
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: A : Type u_1
inst✝ : CStarAlgebra A
b : A
a : A := star b * b
a_def : a = star b * b
ha : IsSelfAdjoint a
c : A := b * a⁻
⊢ -a⁻ * (a⁺ - a⁻) * a⁻ = a⁻ ^ 3

Tactic:
simp [mul_sub, pow_succ]

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Basic

Goal state before:
pp: case refine_3
A : Type u_1
inst✝ : CStarAlgebra A
b : A
a : A := star b * b
a_def : a = star b * b
ha : IsSelfAdjoint a
c : A := b * a⁻
h_eq_negPart_a : -(star c * c) = a⁻ ^ 3
h_c_spec₀ : SpectrumRestricts (-(star c * c)) fun x ↦ ContinuousMap.realToNNReal x
⊢ SpectrumRestricts (2 • (↑(ℜ c) ^ 2 + ↑(ℑ c) ^ 2)) ⇑ContinuousMap.realToNNReal

Tactic:
rw [← Nat.cast_smul_eq_nsmul ℝ]
      refine (ℜ c).2.sq_spectrumRestricts.nnreal_add ((ℜ c).2.pow 2) ((ℑ c).2.pow 2)
        (ℑ c).2.sq_spectrumRestricts |>.smul_of_nonneg <| by simp

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.SpecialFunctions.PosPart

Goal state before:
pp: case h
A : Type u_2
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
a : A
⊢ ((∀ (i : Fin 4), 0 ≤ ![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] i) ∧
      ∀ (i : Fin 4), ‖![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] i‖ ≤ ‖a‖) ∧
    a = ∑ i, I ^ ↑i • ![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] i

Tactic:
← forall_and

Goal state after:
case h
A : Type u_2
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
a : A
⊢ (∀ (x : Fin 4),
      0 ≤ ![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] x ∧
        ‖![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] x‖ ≤ ‖a‖) ∧
    a = ∑ i, I ^ ↑i • ![(↑(realPart a))⁺, (↑(imaginaryPart a))⁺, (↑(realPart a))⁻, (↑(imaginaryPart a))⁻] i
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝¹¹ : PartialOrder A
inst✝¹⁰ : NonUnitalRing A
inst✝⁹ : TopologicalSpace A
inst✝⁸ : StarRing A
inst✝⁷ : Module ℝ A
inst✝⁶ : SMulCommClass ℝ A A
inst✝⁵ : IsScalarTower ℝ A A
inst✝⁴ : StarOrderedRing A
inst✝³ : NonUnitalContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
ha : 0 ≤ a
⊢ sqrt (a ^ 2) = a

Tactic:
sqrt_nnrpow_two _

Goal state after:
A : Type u_1
inst✝¹¹ : PartialOrder A
inst✝¹⁰ : NonUnitalRing A
inst✝⁹ : TopologicalSpace A
inst✝⁸ : StarRing A
inst✝⁷ : Module ℝ A
inst✝⁶ : SMulCommClass ℝ A A
inst✝⁵ : IsScalarTower ℝ A A
inst✝⁴ : StarOrderedRing A
inst✝³ : NonUnitalContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
ha : 0 ≤ a
⊢ a = a
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
x y : ℝ
hx : 0 ≤ x
hy : 0 ≤ y
ha : 0 ≤ a
⊢ cfc (fun x ↦ x ^ y) (cfc (fun x_1 ↦ x_1 ^ x) a) = cfc (fun x_1 ↦ x_1 ^ (x * y)) a

Tactic:
rw [← cfc_comp _ _ a]

Goal state after:
A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
x y : ℝ
hx : 0 ≤ x
hy : 0 ≤ y
ha : 0 ≤ a
⊢ cfc ((fun x ↦ x ^ y) ∘ fun x_1 ↦ x_1 ^ x) a = cfc (fun x_1 ↦ x_1 ^ (x * y)) a
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝⁷ : PartialOrder A
inst✝⁶ : Ring A
inst✝⁵ : StarRing A
inst✝⁴ : TopologicalSpace A
inst✝³ : StarOrderedRing A
inst✝² : Algebra ℝ A
inst✝¹ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝ : NonnegSpectrumClass ℝ A
a : Aˣ
ha : 0 ≤ ↑a
⊢ ↑a ^ (-1) = ↑a⁻¹

Tactic:
refine a.inv_eq_of_mul_eq_one_left ?_ |>.symm

Goal state after:
A : Type u_1
inst✝⁷ : PartialOrder A
inst✝⁶ : Ring A
inst✝⁵ : StarRing A
inst✝⁴ : TopologicalSpace A
inst✝³ : StarOrderedRing A
inst✝² : Algebra ℝ A
inst✝¹ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝ : NonnegSpectrumClass ℝ A
a : Aˣ
ha : 0 ≤ ↑a
⊢ ↑a ^ (-1) * ↑a = 1
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝¹⁰ : PartialOrder A
inst✝⁹ : Ring A
inst✝⁸ : StarRing A
inst✝⁷ : TopologicalSpace A
inst✝⁶ : StarOrderedRing A
inst✝⁵ : Algebra ℝ A
inst✝⁴ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝³ : NonnegSpectrumClass ℝ A
inst✝² : IsSemitopologicalRing A
inst✝¹ : T2Space A
inst✝ : Nontrivial A
a : A
h : cfcₙ (⇑NNReal.sqrt) a = 1
⊢ 0 ≤ a

Tactic:
cfcₙ

Goal state after:
A : Type u_1
inst✝¹⁰ : PartialOrder A
inst✝⁹ : Ring A
inst✝⁸ : StarRing A
inst✝⁷ : TopologicalSpace A
inst✝⁶ : StarOrderedRing A
inst✝⁵ : Algebra ℝ A
inst✝⁴ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝³ : NonnegSpectrumClass ℝ A
inst✝² : IsSemitopologicalRing A
inst✝¹ : T2Space A
inst✝ : Nontrivial A
a : A
h :
  (if h : 0 ≤ a ∧ ContinuousOn (⇑NNReal.sqrt) (quasispectrum ℝ≥0 a) ∧ NNReal.sqrt 0 = 0 then
      (cfcₙHom ⋯) { toFun := (quasispectrum ℝ≥0 a).domRestrict ⇑NNReal.sqrt, continuous_toFun := ⋯, map_zero' := ⋯ }
    else 0) =
    1
⊢ 0 ≤ a
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
x : ℝ
h : IsUnit a
hx : x ≠ 0
hnonneg : 0 ≤ a
this : IsStrictlyPositive a
⊢ sqrt (a ^ x) = a ^ (x / 2)

Tactic:
simp [sqrt_eq_rpow, div_eq_mul_inv, one_mul, rpow_rpow _ _ _ hx]

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Order

Goal state before:
pp: A : Type u_1
inst✝² : CStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
a : A
ha : IsSelfAdjoint a
⊢ a ≤ (algebraMap ℝ A) ‖a‖

Tactic:
by_cases! nontriv : Nontrivial A
  · refine le_algebraMap_of_spectrum_le fun r hr => ?_
    calc r ≤ ‖r‖ := Real.le_norm_self r
      _ ≤ ‖a‖ := spectrum.norm_le_norm_of_mem hr
  · simp

Goal state after:
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
ha : ¬IsStrictlyPositive a
ha' : ¬IsUnit (sqrt a)
H : ¬0 ≤ a
hunit : IsUnit a
⊢ ¬0 ≤ a⁻¹ʳ

Tactic:
grind [CFC.ringInverse_nonneg_iff_nonneg_of_isUnit]

Goal state after:
Module: Mathlib.Analysis.SpecialFunctions.ContinuousFunctionalCalculus.Rpow.Basic

Goal state before:
pp: A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
tfae_1_iff_8 : IsStrictlyPositive a ↔ 0 ≤ a ∧ IsUnit a
tfae_1_iff_9 : IsStrictlyPositive a ↔ IsSelfAdjoint a ∧ ∀ x ∈ spectrum ℝ a, 0 < x
tfae_1_to_2 : IsStrictlyPositive a → IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a
tfae_2_to_3 : IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a → IsUnit (sqrt a) ∧ a = sqrt a * sqrt a
tfae_3_to_4 : IsUnit (sqrt a) ∧ a = sqrt a * sqrt a → ∃ b, IsStrictlyPositive b ∧ a = b * b
tfae_4_to_5 : (∃ b, IsStrictlyPositive b ∧ a = b * b) → ∃ b, IsUnit b ∧ IsSelfAdjoint b ∧ a = b * b
⊢ [IsStrictlyPositive a, IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a, IsUnit (sqrt a) ∧ a = sqrt a * sqrt a,
      ∃ b, IsStrictlyPositive b ∧ a = b * b, ∃ b, IsUnit b ∧ IsSelfAdjoint b ∧ a = b * b,
      ∃ b, IsUnit b ∧ a = star b * b, ∃ b, IsUnit b ∧ a = b * star b, 0 ≤ a ∧ IsUnit a,
      IsSelfAdjoint a ∧ ∀ x ∈ spectrum ℝ a, 0 < x].TFAE

Tactic:
tfae_have 5 → 6 := fun ⟨b, hb, hbsa, hab⟩ => ⟨b, hb, hbsa.symm ▸ hab⟩

Goal state after:
A : Type u_1
inst✝⁹ : PartialOrder A
inst✝⁸ : Ring A
inst✝⁷ : StarRing A
inst✝⁶ : TopologicalSpace A
inst✝⁵ : StarOrderedRing A
inst✝⁴ : Algebra ℝ A
inst✝³ : ContinuousFunctionalCalculus ℝ A IsSelfAdjoint
inst✝² : NonnegSpectrumClass ℝ A
inst✝¹ : IsSemitopologicalRing A
inst✝ : T2Space A
a : A
tfae_1_iff_8 : IsStrictlyPositive a ↔ 0 ≤ a ∧ IsUnit a
tfae_1_iff_9 : IsStrictlyPositive a ↔ IsSelfAdjoint a ∧ ∀ x ∈ spectrum ℝ a, 0 < x
tfae_1_to_2 : IsStrictlyPositive a → IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a
tfae_2_to_3 : IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a → IsUnit (sqrt a) ∧ a = sqrt a * sqrt a
tfae_3_to_4 : IsUnit (sqrt a) ∧ a = sqrt a * sqrt a → ∃ b, IsStrictlyPositive b ∧ a = b * b
tfae_4_to_5 : (∃ b, IsStrictlyPositive b ∧ a = b * b) → ∃ b, IsUnit b ∧ IsSelfAdjoint b ∧ a = b * b
tfae_5_to_6 : (∃ b, IsUnit b ∧ IsSelfAdjoint b ∧ a = b * b) → ∃ b, IsUnit b ∧ a = star b * b
⊢ [IsStrictlyPositive a, IsStrictlyPositive (sqrt a) ∧ a = sqrt a * sqrt a, IsUnit (sqrt a) ∧ a = sqrt a * sqrt a,
      ∃ b, IsStrictlyPositive b ∧ a = b * b, ∃ b, IsUnit b ∧ IsSelfAdjoint b ∧ a = b * b,
      ∃ b, IsUnit b ∧ a = star b * b, ∃ b, IsUnit b ∧ a = b * star b, 0 ≤ a ∧ IsUnit a,
      IsSelfAdjoint a ∧ ∀ x ∈ spectrum ℝ a, 0 < x].TFAE
Module: Mathlib.Analysis.CStarAlgebra.Module.Defs

Goal state before:
pp: A : Type u_1
E : Type u_2
inst✝⁶ : NonUnitalCStarAlgebra A
inst✝⁵ : PartialOrder A
inst✝⁴ : AddCommGroup E
inst✝³ : Module ℂ E
inst✝² : SMul A E
inst✝¹ : Norm E
inst✝ : CStarModule A E
x : E
h : ‖x‖ = 0
⊢ x = 0

Tactic:
simpa [norm_eq_sqrt_norm_inner_self (A := A), inner_self] using h

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Order

Goal state before:
pp: A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
f : ℝ → ℝ
s : Set A
hf : ConcaveOn ℝ (inr '' s) (cfc f)
⊢ ConcaveOn ℝ s (- -cfcₙ f)

Tactic:
← cfcₙ_neg' f

Goal state after:
A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
f : ℝ → ℝ
s : Set A
hf : ConcaveOn ℝ (inr '' s) (cfc f)
⊢ ConcaveOn ℝ s (-cfcₙ (-f))
Module: Mathlib.Analysis.CStarAlgebra.ApproximateUnit

Goal state before:
pp: A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
a b : A
hab : a ≤ b
ha : 0 ≤ a
hb : 0 ≤ b
⊢ cfc (fun x ↦ 1 - (1 + x)⁻¹) ↑a ≤ ↑(cfcₙ (fun x ↦ 1 - (1 + x)⁻¹) b)

Tactic:
nnreal_cfcₙ_eq_cfc_inr b _

Goal state after:
A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
a b : A
hab : a ≤ b
ha : 0 ≤ a
hb : 0 ≤ b
⊢ cfc (fun x ↦ 1 - (1 + x)⁻¹) ↑a ≤ cfc (fun x ↦ 1 - (1 + x)⁻¹) ↑b
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Continuity

Goal state before:
pp: X : Type u_1
R : Type u_2
A : Type u_3
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : Nontrivial R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : NonUnitalRing A
inst✝⁶ : StarRing A
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Module R A
inst✝³ : SMulCommClass R A A
inst✝² : IsScalarTower R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : TopologicalSpace X
f : X → R → R
a : A
s : Set X
hf : ∀ x ∈ s, ContinuousOn (f x) (quasispectrum R a)
hf0 : ∀ x ∈ s, f x 0 = 0
h_cont : ∀ x ∈ s, TendstoUniformlyOn (fun x ↦ f x) (f x) (𝓝[s] x) (quasispectrum R a)
⊢ ∀ x ∈ s, ContinuousWithinAt (fun x ↦ cfcₙ (f x) a) s x

Tactic:
refine fun x hx ↦ continuousWithinAt_cfcₙ_fun (h_cont x hx) ?_ ?_

Goal state after:
case refine_1
X : Type u_1
R : Type u_2
A : Type u_3
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : Nontrivial R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : NonUnitalRing A
inst✝⁶ : StarRing A
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Module R A
inst✝³ : SMulCommClass R A A
inst✝² : IsScalarTower R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : TopologicalSpace X
f : X → R → R
a : A
s : Set X
hf : ∀ x ∈ s, ContinuousOn (f x) (quasispectrum R a)
hf0 : ∀ x ∈ s, f x 0 = 0
h_cont : ∀ x ∈ s, TendstoUniformlyOn (fun x ↦ f x) (f x) (𝓝[s] x) (quasispectrum R a)
x : X
hx : x ∈ s
⊢ ∀ᶠ (x : X) in 𝓝[s] x, ContinuousOn (f x) (quasispectrum R a)

case refine_2
X : Type u_1
R : Type u_2
A : Type u_3
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : Nontrivial R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : NonUnitalRing A
inst✝⁶ : StarRing A
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Module R A
inst✝³ : SMulCommClass R A A
inst✝² : IsScalarTower R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : TopologicalSpace X
f : X → R → R
a : A
s : Set X
hf : ∀ x ∈ s, ContinuousOn (f x) (quasispectrum R a)
hf0 : ∀ x ∈ s, f x 0 = 0
h_cont : ∀ x ∈ s, TendstoUniformlyOn (fun x ↦ f x) (f x) (𝓝[s] x) (quasispectrum R a)
x : X
hx : x ∈ s
⊢ ∀ᶠ (x : X) in 𝓝[s] x, f x 0 = 0
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Continuity

Goal state before:
pp: X : Type u_1
R : Type u_2
A : Type u_3
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : Nontrivial R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : NonUnitalRing A
inst✝⁶ : StarRing A
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Module R A
inst✝³ : SMulCommClass R A A
inst✝² : IsScalarTower R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : TopologicalSpace X
f : X → R → R
a : A
s : Set X
hf : ∀ x ∈ s, ContinuousOn (f x) (quasispectrum R a)
hf0 : ∀ x ∈ s, f x 0 = 0
h_cont : ∀ x ∈ s, TendstoUniformlyOn (fun x ↦ f x) (f x) (𝓝[s] x) (quasispectrum R a)
x✝ : X
hx✝ : x✝ ∈ s
x : X
hx : x ∈ s
⊢ ContinuousOn (f x) (quasispectrum R a)

pp: X : Type u_1
R : Type u_2
A : Type u_3
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : Nontrivial R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : NonUnitalRing A
inst✝⁶ : StarRing A
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Module R A
inst✝³ : SMulCommClass R A A
inst✝² : IsScalarTower R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : TopologicalSpace X
f : X → R → R
a : A
s : Set X
hf : ∀ x ∈ s, ContinuousOn (f x) (quasispectrum R a)
hf0 : ∀ x ∈ s, f x 0 = 0
h_cont : ∀ x ∈ s, TendstoUniformlyOn (fun x ↦ f x) (f x) (𝓝[s] x) (quasispectrum R a)
x✝ : X
hx✝ : x✝ ∈ s
x : X
hx : x ∈ s
⊢ f x 0 = 0

Tactic:
exacts [hf x hx, hf0 x hx]

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.PositiveLinearMap

Goal state before:
pp: A₁ : Type u_1
A₂ : Type u_2
inst✝⁵ : NonUnitalCStarAlgebra A₁
inst✝⁴ : NonUnitalCStarAlgebra A₂
inst✝³ : PartialOrder A₁
inst✝² : StarOrderedRing A₁
inst✝¹ : PartialOrder A₂
inst✝ : StarOrderedRing A₂
f : A₁ →ₚ[ℂ] A₂
C : ℝ≥0
hmain : ∀ (a : A₁), 0 ≤ a → ‖f a‖ ≤ ↑C * ‖a‖
x : A₁
y : Fin 4 → A₁
hy_nonneg : ∀ (i : Fin 4), 0 ≤ y i
hy_norm : ∀ (i : Fin 4), ‖y i‖ ≤ ‖x‖
hy : x = ∑ i, I ^ ↑i • y i
⊢ ‖f x‖ ≤ ↑(4 * C) * ‖x‖

Tactic:
conv_lhs => rw [hy]

Goal state after:
A₁ : Type u_1
A₂ : Type u_2
inst✝⁵ : NonUnitalCStarAlgebra A₁
inst✝⁴ : NonUnitalCStarAlgebra A₂
inst✝³ : PartialOrder A₁
inst✝² : StarOrderedRing A₁
inst✝¹ : PartialOrder A₂
inst✝ : StarOrderedRing A₂
f : A₁ →ₚ[ℂ] A₂
C : ℝ≥0
hmain : ∀ (a : A₁), 0 ≤ a → ‖f a‖ ≤ ↑C * ‖a‖
x : A₁
y : Fin 4 → A₁
hy_nonneg : ∀ (i : Fin 4), 0 ≤ y i
hy_norm : ∀ (i : Fin 4), ‖y i‖ ≤ ‖x‖
hy : x = ∑ i, I ^ ↑i • y i
⊢ ‖f (∑ i, I ^ ↑i • y i)‖ ≤ ↑(4 * C) * ‖x‖
Module: Mathlib.Analysis.CStarAlgebra.ApproximateUnit

Goal state before:
pp: case h₁
A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
m✝¹ m✝ : A
ε : ℝ≥0
hε : 0 < ε
x✝ : A
x m : Unitization ℂ A
hm₁ : 0 ≤ m
hm₂ : ‖m‖ < 1
hx₂ : ‖x‖ ≤ 1
hx₀ : 0 ≤ x
g : ℝ≥0 → ℝ≥0 := ⋯
hx₁ : cfc g (ε⁻¹ ^ 2 • m) ≤ x
hg : Continuous g
hg' : ContinuousOn (fun y ↦ (1 + ε⁻¹ ^ 2 • y)⁻¹) (σ ℝ≥0 m)
hx : x ∈ Set.Icc 0 1
hx' : x ∈ Set.Icc (cfc g (ε⁻¹ ^ 2 • m)) 1
this : star m * (1 - cfc g (ε⁻¹ ^ 2 • m)) * m = cfc (fun y ↦ y * (1 + ε⁻¹ ^ 2 • y)⁻¹ * y) m
y : ℝ≥0
hy : y ∈ σ ℝ≥0 m
⊢ y ≤ 1

Tactic:
have hm' := hm₂.le

Goal state after:
case h₁
A : Type u_1
inst✝² : NonUnitalCStarAlgebra A
inst✝¹ : PartialOrder A
inst✝ : StarOrderedRing A
m✝¹ m✝ : A
ε : ℝ≥0
hε : 0 < ε
x✝ : A
x m : Unitization ℂ A
hm₁ : 0 ≤ m
hm₂ : ‖m‖ < 1
hx₂ : ‖x‖ ≤ 1
hx₀ : 0 ≤ x
g : ℝ≥0 → ℝ≥0 := fun y ↦ 1 - (1 + y)⁻¹
hx₁ : cfc g (ε⁻¹ ^ 2 • m) ≤ x
hg : Continuous g
hg' : ContinuousOn (fun y ↦ (1 + ε⁻¹ ^ 2 • y)⁻¹) (σ ℝ≥0 m)
hx : x ∈ Set.Icc 0 1
hx' : x ∈ Set.Icc (cfc g (ε⁻¹ ^ 2 • m)) 1
this : star m * (1 - cfc g (ε⁻¹ ^ 2 • m)) * m = cfc (fun y ↦ y * (1 + ε⁻¹ ^ 2 • y)⁻¹ * y) m
y : ℝ≥0
hy : y ∈ σ ℝ≥0 m
hm' : ‖m‖ ≤ 1
⊢ y ≤ 1
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Commute

Goal state before:
pp: case id
𝕜 : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : RCLike 𝕜
inst✝⁸ : NonUnitalRing A
inst✝⁷ : StarRing A
inst✝⁶ : Module 𝕜 A
inst✝⁵ : IsScalarTower 𝕜 A A
inst✝⁴ : SMulCommClass 𝕜 A A
inst✝³ : TopologicalSpace A
inst✝² : NonUnitalContinuousFunctionalCalculus 𝕜 A p
inst✝¹ : IsTopologicalRing A
inst✝ : T2Space A
a b : A
ha : p a
hb₁ : Commute a b
hb₂ : Commute (star a) b
⊢ Commute ((cfcₙHom ha) (ContinuousMapZero.id (quasispectrum 𝕜 a))) b

Tactic:
rwa [cfcₙHom_id ha]

Goal state after:
Module: Mathlib.Analysis.CStarAlgebra.CStarMatrix

Goal state before:
pp: m : Type u_1
n : Type u_2
R✝ : Type u_3
S : Type u_4
A✝ : Type u_5
B : Type u_6
R : Type ?u.14
A : Type ?u.16
inst✝⁶ : Fintype m
inst✝⁵ : Fintype n
inst✝⁴ : Semiring R
inst✝³ : AddCommMonoid A
inst✝² : Mul A
inst✝¹ : Module R A
inst✝ : Star A
e : m ≃ n
M N : CStarMatrix m m A
⊢ (↑(reindexₗ R A e e)).toFun (M * N) = (↑(reindexₗ R A e e)).toFun M * (↑(reindexₗ R A e e)).toFun N

Tactic:
ext i j

Goal state after:
m : Type u_1
n : Type u_2
R✝ : Type u_3
S : Type u_4
A✝ : Type u_5
B : Type u_6
R : Type ?u.14
A : Type ?u.16
inst✝⁶ : Fintype m
inst✝⁵ : Fintype n
inst✝⁴ : Semiring R
inst✝³ : AddCommMonoid A
inst✝² : Mul A
inst✝¹ : Module R A
inst✝ : Star A
e : m ≃ n
M N : CStarMatrix m m A
i j : n
⊢ (↑(reindexₗ R A e e)).toFun (M * N) i j = ((↑(reindexₗ R A e e)).toFun M * (↑(reindexₗ R A e e)).toFun N) i j