mathlib-initiative/mathlib-tactics huggingface dataset:
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Unital

Goal state before:
pp: R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommSemiring R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalSemiring R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
g f : R → R
a : A
ha : p a
hg : ContinuousOn g (f '' spectrum R a)
hf : ContinuousOn f (spectrum R a)
this : ContinuousOn (g ∘ f) (spectrum R a)
sp_eq : spectrum R ((cfcHom ⋯) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ }) = f '' spectrum R a
⊢ (cfcHom ha) { toFun := (spectrum R a).domRestrict (g ∘ f), continuous_toFun := ⋯ } = cfc g (cfc f a)

Tactic:
cfc_apply f a,

Goal state after:
R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommSemiring R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalSemiring R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
g f : R → R
a : A
ha : p a
hg : ContinuousOn g (f '' spectrum R a)
hf : ContinuousOn f (spectrum R a)
this : ContinuousOn (g ∘ f) (spectrum R a)
sp_eq : spectrum R ((cfcHom ⋯) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ }) = f '' spectrum R a
⊢ (cfcHom ha) { toFun := (spectrum R a).domRestrict (g ∘ f), continuous_toFun := ⋯ } =
    cfc g ((cfcHom ha) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ })
Module: Mathlib.Topology.EMetricSpace.BoundedVariation

Goal state before:
pp: case inl
α : Type u_1
inst✝³ : LinearOrder α
E : Type u_2
inst✝² : PseudoEMetricSpace E
inst✝¹ : TopologicalSpace α
inst✝ : OrderTopology α
f : α → E
s : Set α
hf : BoundedVariationOn f s
x : α
h : ContinuousWithinAt f (s ∩ Iic x) x
h' : 𝓝[s ∩ Iio x] x = ⊥
⊢ Tendsto (fun y ↦ eVariationOn f (s ∩ Icc y x)) (𝓝[s] x) (𝓝 0)

Tactic:
apply tendsto_const_nhds.congr'

Goal state after:
case inl
α : Type u_1
inst✝³ : LinearOrder α
E : Type u_2
inst✝² : PseudoEMetricSpace E
inst✝¹ : TopologicalSpace α
inst✝ : OrderTopology α
f : α → E
s : Set α
hf : BoundedVariationOn f s
x : α
h : ContinuousWithinAt f (s ∩ Iic x) x
h' : 𝓝[s ∩ Iio x] x = ⊥
⊢ (fun x ↦ 0) =ᶠ[𝓝[s] x] fun y ↦ eVariationOn f (s ∩ Icc y x)
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Restrict

Goal state before:
pp: case hφ₁
R : Type u_1
S : Type u_2
A : Type u_3
p q : A → Prop
inst✝²⁵ : Semifield R
inst✝²⁴ : StarRing R
inst✝²³ : MetricSpace R
inst✝²² : IsTopologicalSemiring R
inst✝²¹ : ContinuousStar R
inst✝²⁰ : Field S
inst✝¹⁹ : StarRing S
inst✝¹⁸ : MetricSpace S
inst✝¹⁷ : IsTopologicalRing S
inst✝¹⁶ : ContinuousStar S
inst✝¹⁵ : NonUnitalRing A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module S A
inst✝¹² : IsScalarTower S A A
inst✝¹¹ : SMulCommClass S A A
inst✝¹⁰ : Algebra R S
inst✝⁹ : Module R A
inst✝⁸ : IsScalarTower R S A
inst✝⁷ : StarModule R S
inst✝⁶ : ContinuousSMul R S
inst✝⁵ : TopologicalSpace A
inst✝⁴ : NonUnitalContinuousFunctionalCalculus S A q
inst✝³ : IsScalarTower R A A
inst✝² : SMulCommClass R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
f : C(S, R)
a : A
hpa : p a
hqa : q a
h : QuasispectrumRestricts a ⇑f
⊢ Continuous[_, inst✝⁵] ⇑(nonUnitalStarAlgHom (cfcₙHom hqa) h)

pp: case hφ₂
R : Type u_1
S : Type u_2
A : Type u_3
p q : A → Prop
inst✝²⁵ : Semifield R
inst✝²⁴ : StarRing R
inst✝²³ : MetricSpace R
inst✝²² : IsTopologicalSemiring R
inst✝²¹ : ContinuousStar R
inst✝²⁰ : Field S
inst✝¹⁹ : StarRing S
inst✝¹⁸ : MetricSpace S
inst✝¹⁷ : IsTopologicalRing S
inst✝¹⁶ : ContinuousStar S
inst✝¹⁵ : NonUnitalRing A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module S A
inst✝¹² : IsScalarTower S A A
inst✝¹¹ : SMulCommClass S A A
inst✝¹⁰ : Algebra R S
inst✝⁹ : Module R A
inst✝⁸ : IsScalarTower R S A
inst✝⁷ : StarModule R S
inst✝⁶ : ContinuousSMul R S
inst✝⁵ : TopologicalSpace A
inst✝⁴ : NonUnitalContinuousFunctionalCalculus S A q
inst✝³ : IsScalarTower R A A
inst✝² : SMulCommClass R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
f : C(S, R)
a : A
hpa : p a
hqa : q a
h : QuasispectrumRestricts a ⇑f
⊢ (nonUnitalStarAlgHom (cfcₙHom hqa) h) (ContinuousMapZero.id (σₙ R a)) = a

Tactic:
· exact h.continuous_nonUnitalStarAlgHom (cfcₙHom_continuous hqa)

Goal state after:
case hφ₂
R : Type u_1
S : Type u_2
A : Type u_3
p q : A → Prop
inst✝²⁵ : Semifield R
inst✝²⁴ : StarRing R
inst✝²³ : MetricSpace R
inst✝²² : IsTopologicalSemiring R
inst✝²¹ : ContinuousStar R
inst✝²⁰ : Field S
inst✝¹⁹ : StarRing S
inst✝¹⁸ : MetricSpace S
inst✝¹⁷ : IsTopologicalRing S
inst✝¹⁶ : ContinuousStar S
inst✝¹⁵ : NonUnitalRing A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module S A
inst✝¹² : IsScalarTower S A A
inst✝¹¹ : SMulCommClass S A A
inst✝¹⁰ : Algebra R S
inst✝⁹ : Module R A
inst✝⁸ : IsScalarTower R S A
inst✝⁷ : StarModule R S
inst✝⁶ : ContinuousSMul R S
inst✝⁵ : TopologicalSpace A
inst✝⁴ : NonUnitalContinuousFunctionalCalculus S A q
inst✝³ : IsScalarTower R A A
inst✝² : SMulCommClass R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
f : C(S, R)
a : A
hpa : p a
hqa : q a
h : QuasispectrumRestricts a ⇑f
⊢ (nonUnitalStarAlgHom (cfcₙHom hqa) h) (ContinuousMapZero.id (σₙ R a)) = a
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Unital

Goal state before:
pp: case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommRing R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalRing R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
inst✝ : ContinuousFunctionalCalculus R A p
f g : R → R
a : A
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ cfc (fun x ↦ f x - g x) a = cfc f a - cfc g a

Tactic:
cfc_apply f a,

Goal state after:
case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommRing R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalRing R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
inst✝ : ContinuousFunctionalCalculus R A p
f g : R → R
a : A
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ cfc (fun x ↦ f x - g x) a = (cfcHom ha) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ } - cfc g a
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Unital

Goal state before:
pp: case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommRing R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalRing R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
inst✝ : ContinuousFunctionalCalculus R A p
f : R → R
a : A
ha : p a
hf : ContinuousOn f (spectrum R a)
⊢ cfc (fun x ↦ -f x) a = -cfc f a

Tactic:
cfc_apply f a,

Goal state after:
case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝⁹ : CommRing R
inst✝⁸ : StarRing R
inst✝⁷ : MetricSpace R
inst✝⁶ : IsTopologicalRing R
inst✝⁵ : ContinuousStar R
inst✝⁴ : TopologicalSpace A
inst✝³ : Ring A
inst✝² : StarRing A
inst✝¹ : Algebra R A
inst✝ : ContinuousFunctionalCalculus R A p
f : R → R
a : A
ha : p a
hf : ContinuousOn f (spectrum R a)
⊢ cfc (fun x ↦ -f x) a = -(cfcHom ha) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ }
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Restrict

Goal state before:
pp: case neg.inl
R : Type u_1
S : Type u_2
A : Type u_3
p q : A → Prop
inst✝²⁵ : Semifield R
inst✝²⁴ : StarRing R
inst✝²³ : MetricSpace R
inst✝²² : IsTopologicalSemiring R
inst✝²¹ : ContinuousStar R
inst✝²⁰ : Field S
inst✝¹⁹ : StarRing S
inst✝¹⁸ : MetricSpace S
inst✝¹⁷ : IsTopologicalRing S
inst✝¹⁶ : ContinuousStar S
inst✝¹⁵ : NonUnitalRing A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module S A
inst✝¹² : IsScalarTower S A A
inst✝¹¹ : SMulCommClass S A A
inst✝¹⁰ : Algebra R S
inst✝⁹ : Module R A
inst✝⁸ : IsScalarTower R S A
inst✝⁷ : StarModule R S
inst✝⁶ : ContinuousSMul R S
inst✝⁵ : TopologicalSpace A
inst✝⁴ : NonUnitalContinuousFunctionalCalculus S A q
inst✝³ : IsScalarTower R A A
inst✝² : SMulCommClass R A A
inst✝¹ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
f : C(S, R)
halg : IsClosedEmbedding ⇑(algebraMap R S)
a : A
hpa : p a
hqa : q a
h : QuasispectrumRestricts a ⇑f
g : R → R
hg : ¬ContinuousOn g (σₙ R a)
⊢ cfcₙ g a = cfcₙ (fun x ↦ (algebraMap R S) (g (f x))) a

Tactic:
have : ¬ ContinuousOn (fun x ↦ algebraMap R S (g (f x)) : S → S) (σₙ S a) := by
        refine fun hg' ↦ hg ?_
        rw [halg.isEmbedding.continuousOn_iff]
        simpa [halg.isEmbedding.continuousOn_iff, Function.comp_def, h.left_inv _] using
          hg'.comp halg.isEmbedding.continuous.continuousOn
          (fun _ : R ↦ quasispectrum.algebraMap_mem S)
      rw [cfcₙ_apply_of_not_continuousOn a hg, cfcₙ_apply_of_not_continuousOn a this]

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

Goal state before:
pp: case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : PartialOrder R
inst✝¹¹ : StarRing R
inst✝¹⁰ : MetricSpace R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : ContinuousSqrt R
inst✝⁶ : StarOrderedRing R
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Ring A
inst✝³ : StarRing A
inst✝² : PartialOrder A
inst✝¹ : StarOrderedRing A
inst✝ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
f g : R → R
a : A
h : ∀ x ∈ spectrum R a, f x ≤ g x
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ cfc f a ≤ cfc g a

Tactic:
cfc_apply f a,

Goal state after:
case pos
R : Type u_1
A : Type u_2
p : A → Prop
inst✝¹³ : CommSemiring R
inst✝¹² : PartialOrder R
inst✝¹¹ : StarRing R
inst✝¹⁰ : MetricSpace R
inst✝⁹ : IsTopologicalSemiring R
inst✝⁸ : ContinuousStar R
inst✝⁷ : ContinuousSqrt R
inst✝⁶ : StarOrderedRing R
inst✝⁵ : TopologicalSpace A
inst✝⁴ : Ring A
inst✝³ : StarRing A
inst✝² : PartialOrder A
inst✝¹ : StarOrderedRing A
inst✝ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
f g : R → R
a : A
h : ∀ x ∈ spectrum R a, f x ≤ g x
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ (cfcHom ha) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ } ≤ cfc g a
Module: Mathlib.Analysis.CStarAlgebra.ContinuousFunctionalCalculus.Unital

Goal state before:
pp: R : Type u_1
A : Type u_2
p : A → Prop
inst✝¹⁴ : CommRing R
inst✝¹³ : PartialOrder R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : IsTopologicalRing R
inst✝⁹ : ContinuousStar R
inst✝⁸ : ContinuousSqrt R
inst✝⁷ : StarOrderedRing R
inst✝⁶ : TopologicalSpace A
inst✝⁵ : Ring A
inst✝⁴ : StarRing A
inst✝³ : PartialOrder A
inst✝² : StarOrderedRing A
inst✝¹ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
inst✝ : NonnegSpectrumClass R A
f g : R → R
a : A
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ cfc f a ≤ cfc g a ↔ ∀ x ∈ spectrum R a, f x ≤ g x

Tactic:
cfc_apply f a,

Goal state after:
R : Type u_1
A : Type u_2
p : A → Prop
inst✝¹⁴ : CommRing R
inst✝¹³ : PartialOrder R
inst✝¹² : StarRing R
inst✝¹¹ : MetricSpace R
inst✝¹⁰ : IsTopologicalRing R
inst✝⁹ : ContinuousStar R
inst✝⁸ : ContinuousSqrt R
inst✝⁷ : StarOrderedRing R
inst✝⁶ : TopologicalSpace A
inst✝⁵ : Ring A
inst✝⁴ : StarRing A
inst✝³ : PartialOrder A
inst✝² : StarOrderedRing A
inst✝¹ : Algebra R A
instCFC : ContinuousFunctionalCalculus R A p
inst✝ : NonnegSpectrumClass R A
f g : R → R
a : A
hf : ContinuousOn f (spectrum R a)
hg : ContinuousOn g (spectrum R a)
ha : p a
⊢ (cfcHom ha) { toFun := (spectrum R a).domRestrict f, continuous_toFun := ⋯ } ≤ cfc g a ↔ ∀ x ∈ spectrum R a, f x ≤ g x
Module: Mathlib.Topology.Algebra.StarSubalgebra

Goal state before:
pp: R : Type u_1
A : Type u_2
B : Type u_3
inst✝¹⁶ : CommSemiring R
inst✝¹⁵ : StarRing R
inst✝¹⁴ : TopologicalSpace A
inst✝¹³ : Semiring A
inst✝¹² : StarRing A
inst✝¹¹ : IsSemitopologicalSemiring A
inst✝¹⁰ : ContinuousStar A
inst✝⁹ : Algebra R A
inst✝⁸ : StarModule R A
inst✝⁷ : TopologicalSpace B
inst✝⁶ : Semiring B
inst✝⁵ : StarRing B
inst✝⁴ : Algebra R B
inst✝³ : T2Space B
F : Type u_4
a : A
inst✝² : FunLike F (↥(elemental R a)) B
inst✝¹ : AlgHomClass F R (↥(elemental R a)) B
inst✝ : StarHomClass F (↥(elemental R a)) B
φ ψ : F
hφ : Continuous[instTopologicalSpaceSubtype, inst✝⁷] ⇑φ
hψ : Continuous[instTopologicalSpaceSubtype, inst✝⁷] ⇑ψ
h : φ ⟨a, ⋯⟩ = ψ ⟨a, ⋯⟩
x✝ x y : ↥(adjoin R {a})
hx : φ ((inclusion ⋯) x) = ψ ((inclusion ⋯) x)
hy : φ ((inclusion ⋯) y) = ψ ((inclusion ⋯) y)
⊢ φ ((inclusion ⋯) (x + y)) = ψ ((inclusion ⋯) (x + y))

Tactic:
by simp only [map_add, hx, hy]

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

Goal state before:
pp: R : Type u_1
A : Type u_2
p : A → Prop
inst✝¹² : CommSemiring R
inst✝¹¹ : Nontrivial R
inst✝¹⁰ : StarRing R
inst✝⁹ : MetricSpace R
inst✝⁸ : IsTopologicalSemiring R
inst✝⁷ : ContinuousStar R
inst✝⁶ : NonUnitalRing A
inst✝⁵ : StarRing A
inst✝⁴ : TopologicalSpace A
inst✝³ : Module R A
inst✝² : IsScalarTower R A A
inst✝¹ : SMulCommClass R A A
instCFCₙ : NonUnitalContinuousFunctionalCalculus R A p
inst✝ : UniqueHom R A
g f : R → R
a : A
hg : ContinuousOn g (f '' σₙ R a)
hg0 : g 0 = 0
hf : ContinuousOn f (σₙ R a)
hf0 : f 0 = 0
ha : p a
⊢ cfcₙ (g ∘ f) a = cfcₙ g (cfcₙ f a)

Tactic:
by
  have := hg.comp hf <| (σₙ R a).mapsTo_image f
  have sp_eq :
      σₙ R (cfcₙHom (show p a from ha) ⟨ContinuousMap.mk _ hf.domRestrict, hf0⟩) =
        f '' (σₙ R a) := by
    rw [cfcₙHom_map_quasispectrum (by exact ha) _]
    ext
    simp
  rw [cfcₙ_apply .., cfcₙ_apply f a,
    cfcₙ_apply _ _ (by convert! hg) (ha := cfcₙHom_predicate (show p a from ha) _),
    ← cfcₙHom_comp _ _]
  swap
  · exact ⟨.mk _ <| hf.domRestrict.codRestrict fun x ↦ by rw [sp_eq]; use x.1; simp,
      Subtype.ext hf0⟩
  · congr
  · exact fun _ ↦ rfl

Goal state after:
Module: Mathlib.RingTheory.Polynomial.Bernstein

Goal state before:
pp: R : Type u_1
inst✝¹ : CommRing R
inst✝ : CharZero R
n ν : ℕ
h : ν ≤ n
⊢ eval 1 ((⇑derivative)^[n - ν] (bernsteinPolynomial R n ν)) ≠ 0

Tactic:
rw [bernsteinPolynomial.iterate_derivative_at_1 _ _ _ h, Ne, neg_one_pow_mul_eq_zero_iff, ←
    Nat.cast_succ, ← ascPochhammer_eval_cast, ← Nat.cast_zero, Nat.cast_inj]

Goal state after:
R : Type u_1
inst✝¹ : CommRing R
inst✝ : CharZero R
n ν : ℕ
h : ν ≤ n
⊢ ¬eval ν.succ (ascPochhammer ℕ (n - ν)) = 0
Module: Mathlib.Topology.ContinuousMap.Polynomial

Goal state before:
pp: case mp.refine_2.convert_2.left
a b : ℝ
h : a < b
f : C(↑(Set.Icc a b), ℝ)
p : ℝ[X]
w : ∀ (x : ↑I), Polynomial.eval (↑x) p = f ((iccHomeoI a b h).symm x)
q : ℝ[X] := ⋯
x : ↑(Set.Icc a b)
w₁ : 0 < (b - a)⁻¹
w₂ : 0 ≤ ↑x - a
w₃ : ↑x - a ≤ b - a
⊢ 0 ≤ (↑x - a) * (b - a)⁻¹

Tactic:
exact mul_nonneg w₂ (le_of_lt w₁)

Goal state after:
Module: Mathlib.Analysis.SpecialFunctions.Bernstein

Goal state before:
pp: E : Type u_1
inst✝⁵ : AddCommGroup E
inst✝⁴ : TopologicalSpace E
inst✝³ : IsTopologicalAddGroup E
inst✝² : Module ℝ E
inst✝¹ : ContinuousSMul ℝ E
inst✝ : LocallyConvexSpace ℝ E
f : C(↑I, E)
this✝ : UniformSpace E := IsTopologicalAddGroup.rightUniformSpace E
this : IsUniformAddGroup E
U : Set E
hU₀ : U ∈ 𝓝 0
hUc : Convex ℝ U
⊢ ∃ C, ∀ (x y : ↑I), gauge U (f x - f y) ≤ C

Tactic:
have : Continuous fun (x, y) ↦ gauge U (f x - f y) := by fun_prop

Goal state after:
E : Type u_1
inst✝⁵ : AddCommGroup E
inst✝⁴ : TopologicalSpace E
inst✝³ : IsTopologicalAddGroup E
inst✝² : Module ℝ E
inst✝¹ : ContinuousSMul ℝ E
inst✝ : LocallyConvexSpace ℝ E
f : C(↑I, E)
this✝¹ : UniformSpace E := IsTopologicalAddGroup.rightUniformSpace E
this✝ : IsUniformAddGroup E
U : Set E
hU₀ : U ∈ 𝓝 0
hUc : Convex ℝ U
this :
  Continuous fun x ↦
    match x with
    | (x, y) => gauge U (f x - f y)
⊢ ∃ C, ∀ (x y : ↑I), gauge U (f x - f y) ≤ C
Module: Mathlib.Analysis.Normed.Algebra.Unitization

Goal state before:
pp: 𝕜 : Type u_1
A : Type u_2
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : NonUnitalNormedRing A
inst✝³ : NormedSpace 𝕜 A
inst✝² : IsScalarTower 𝕜 A A
inst✝¹ : SMulCommClass 𝕜 A A
inst✝ : RegularNormedAlgebra 𝕜 A
x : Unitization 𝕜 A
a✝ : Nontrivial A
⊢ ‖x.toProd.1‖ + ‖(mul 𝕜 A) x.toProd.2‖ = ‖x.toProd.1‖ + ‖x.toProd.2‖

Tactic:
(AddMonoidHomClass.isometry_iff_norm (mul 𝕜 A)).mp (isometry_mul 𝕜 A)

Goal state after:
𝕜 : Type u_1
A : Type u_2
inst✝⁵ : NontriviallyNormedField 𝕜
inst✝⁴ : NonUnitalNormedRing A
inst✝³ : NormedSpace 𝕜 A
inst✝² : IsScalarTower 𝕜 A A
inst✝¹ : SMulCommClass 𝕜 A A
inst✝ : RegularNormedAlgebra 𝕜 A
x : Unitization 𝕜 A
a✝ : Nontrivial A
⊢ ‖x.toProd.1‖ + ‖x.toProd.2‖ = ‖x.toProd.1‖ + ‖x.toProd.2‖
Module: Mathlib.Analysis.CStarAlgebra.Unitization

Goal state before:
pp: 𝕜 : Type u_1
E : Type u_2
inst✝⁸ : DenselyNormedField 𝕜
inst✝⁷ : NonUnitalNormedRing E
inst✝⁶ : StarRing E
inst✝⁵ : CStarRing E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : IsScalarTower 𝕜 E E
inst✝² : SMulCommClass 𝕜 E E
inst✝¹ : StarRing 𝕜
inst✝ : StarModule 𝕜 E
x : Unitization 𝕜 E
b : E
hb : b ∈ Metric.closedBall 0 1
⊢ ‖x.toProd.1⋆ • (b⋆ * (x.toProd.1 • b + x.toProd.2 * b)) + b⋆ * x.toProd.2⋆ * (x.toProd.1 • b + x.toProd.2 * b)‖ ≤
    ‖(algebraMap 𝕜 (E →L[𝕜] E)) (x⋆ * x).toProd.1 + (mul 𝕜 E) (x⋆ * x).toProd.2‖

Tactic:
← mul_smul_comm,

Goal state after:
𝕜 : Type u_1
E : Type u_2
inst✝⁸ : DenselyNormedField 𝕜
inst✝⁷ : NonUnitalNormedRing E
inst✝⁶ : StarRing E
inst✝⁵ : CStarRing E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : IsScalarTower 𝕜 E E
inst✝² : SMulCommClass 𝕜 E E
inst✝¹ : StarRing 𝕜
inst✝ : StarModule 𝕜 E
x : Unitization 𝕜 E
b : E
hb : b ∈ Metric.closedBall 0 1
⊢ ‖b⋆ * x.toProd.1⋆ • (x.toProd.1 • b + x.toProd.2 * b) + b⋆ * x.toProd.2⋆ * (x.toProd.1 • b + x.toProd.2 * b)‖ ≤
    ‖(algebraMap 𝕜 (E →L[𝕜] E)) (x⋆ * x).toProd.1 + (mul 𝕜 E) (x⋆ * x).toProd.2‖
Module: Mathlib.Analysis.CStarAlgebra.Unitization

Goal state before:
pp: case hbc
𝕜 : Type u_1
E : Type u_2
inst✝⁸ : DenselyNormedField 𝕜
inst✝⁷ : NonUnitalNormedRing E
inst✝⁶ : StarRing E
inst✝⁵ : CStarRing E
inst✝⁴ : NormedSpace 𝕜 E
inst✝³ : IsScalarTower 𝕜 E E
inst✝² : SMulCommClass 𝕜 E E
inst✝¹ : StarRing 𝕜
inst✝ : StarModule 𝕜 E
x : Unitization 𝕜 E
b : E
hb : b ∈ Metric.closedBall 0 1
⊢ ‖b⋆‖ ≤ 1

Tactic:
exact (norm_star b).symm ▸ mem_closedBall_zero_iff.1 hb

Goal state after:
Module: Mathlib.Analysis.Normed.Algebra.UnitizationL1

Goal state before:
pp: 𝕜 : Type u_1
A : Type u_2
inst✝⁴ : NormedField 𝕜
inst✝³ : NonUnitalNormedRing A
inst✝² : NormedSpace 𝕜 A
inst✝¹ : IsScalarTower 𝕜 A A
inst✝ : SMulCommClass 𝕜 A A
x y : WithLp 1 (Unitization 𝕜 A)
⊢ ‖(x.ofLp * y.ofLp).toProd.1‖ + ‖(x.ofLp * y.ofLp).toProd.2‖ ≤
    ‖x.ofLp.toProd.1‖ * ‖y.ofLp.toProd.1‖ + ‖x.ofLp.toProd.1‖ * ‖y.ofLp.toProd.2‖ +
      (‖x.ofLp.toProd.2‖ * ‖y.ofLp.toProd.1‖ + ‖x.ofLp.toProd.2‖ * ‖y.ofLp.toProd.2‖)

Tactic:
fst_mul,

Goal state after:
𝕜 : Type u_1
A : Type u_2
inst✝⁴ : NormedField 𝕜
inst✝³ : NonUnitalNormedRing A
inst✝² : NormedSpace 𝕜 A
inst✝¹ : IsScalarTower 𝕜 A A
inst✝ : SMulCommClass 𝕜 A A
x y : WithLp 1 (Unitization 𝕜 A)
⊢ ‖x.ofLp.toProd.1 * y.ofLp.toProd.1‖ + ‖(x.ofLp * y.ofLp).toProd.2‖ ≤
    ‖x.ofLp.toProd.1‖ * ‖y.ofLp.toProd.1‖ + ‖x.ofLp.toProd.1‖ * ‖y.ofLp.toProd.2‖ +
      (‖x.ofLp.toProd.2‖ * ‖y.ofLp.toProd.1‖ + ‖x.ofLp.toProd.2‖ * ‖y.ofLp.toProd.2‖)
Module: Mathlib.Analysis.Normed.Algebra.UnitizationL1

Goal state before:
pp: 𝕜 : Type u_1
A : Type u_2
inst✝⁴ : NormedField 𝕜
inst✝³ : NonUnitalNormedRing A
inst✝² : NormedSpace 𝕜 A
inst✝¹ : IsScalarTower 𝕜 A A
inst✝ : SMulCommClass 𝕜 A A
r : 𝕜
x : WithLp 1 (Unitization 𝕜 A)
⊢ ‖r‖ * ‖x.ofLp.toProd.1‖ + ‖r‖ * ‖x.ofLp.toProd.2‖ ≤ ‖r‖ * (‖x.ofLp.toProd.1‖ + ‖x.ofLp.toProd.2‖)

Tactic:
mul_add

Goal state after:
𝕜 : Type u_1
A : Type u_2
inst✝⁴ : NormedField 𝕜
inst✝³ : NonUnitalNormedRing A
inst✝² : NormedSpace 𝕜 A
inst✝¹ : IsScalarTower 𝕜 A A
inst✝ : SMulCommClass 𝕜 A A
r : 𝕜
x : WithLp 1 (Unitization 𝕜 A)
⊢ ‖r‖ * ‖x.ofLp.toProd.1‖ + ‖r‖ * ‖x.ofLp.toProd.2‖ ≤ ‖r‖ * ‖x.ofLp.toProd.1‖ + ‖r‖ * ‖x.ofLp.toProd.2‖
Module: Mathlib.Topology.Algebra.Module.Spaces.WeakBilin

Goal state before:
pp: α : Type u_1
𝕜 : Type u_2
𝕝 : Type u_3
E : Type u_4
F : Type u_5
inst✝⁶ : TopologicalSpace 𝕜
inst✝⁵ : CommSemiring 𝕜
inst✝⁴ : AddCommMonoid E
inst✝³ : Module 𝕜 E
inst✝² : AddCommMonoid F
inst✝¹ : Module 𝕜 F
B : E →ₗ[𝕜] F →ₗ[𝕜] 𝕜
inst✝ : ContinuousSMul 𝕜 𝕜
⊢ Continuous[instTopologicalSpaceProd, Pi.topologicalSpace] ((fun x y ↦ (B x) y) ∘ fun p ↦ p.1 • p.2)

Tactic:
refine cast (congr_arg _ ?_) (continuous_fst.fun_smul ((coeFn_continuous B).comp continuous_snd))

Goal state after:
α : Type u_1
𝕜 : Type u_2
𝕝 : Type u_3
E : Type u_4
F : Type u_5
inst✝⁶ : TopologicalSpace 𝕜
inst✝⁵ : CommSemiring 𝕜
inst✝⁴ : AddCommMonoid E
inst✝³ : Module 𝕜 E
inst✝² : AddCommMonoid F
inst✝¹ : Module 𝕜 F
B : E →ₗ[𝕜] F →ₗ[𝕜] 𝕜
inst✝ : ContinuousSMul 𝕜 𝕜
⊢ (fun i ↦ i.1 • ((fun x y ↦ (B x) y) ∘ Prod.snd) i) = (fun x y ↦ (B x) y) ∘ fun p ↦ p.1 • p.2
Module: Mathlib.Topology.Semicontinuity.Hemicontinuity

Goal state before:
pp: α : Type u_1
β : Type u_2
inst✝¹ : TopologicalSpace α
f : α → Set β
inst✝ : TopologicalSpace β
| (∀ (x : α), ∀ u ∈ 𝓝ˢ (f x), f ⁻¹' Iic u ∈ 𝓝 x) ↔ ∀ (u : Set β), IsOpen[inst✝] u → ∀ x ∈ f ⁻¹' Iic u, f ⁻¹' Iic u ∈ 𝓝 x

Tactic:
enter [

Goal state after:
α : Type u_1
β : Type u_2
inst✝¹ : TopologicalSpace α
f : α → Set β
inst✝ : TopologicalSpace β
| (∀ (x : α), ∀ u ∈ 𝓝ˢ (f x), f ⁻¹' Iic u ∈ 𝓝 x) ↔ ∀ (u : Set β), IsOpen[inst✝] u → ∀ x ∈ f ⁻¹' Iic u, f ⁻¹' Iic u ∈ 𝓝 x
Module: Mathlib.Topology.Sets.VietorisTopology

Goal state before:
pp: case inl
α : Type u_1
inst✝¹ : TopologicalSpace α
inst✝ : T2Space α
t : TopologicalSpace (Set α)
h₁ : IsOpen[t] {∅}
h₂ : ∀ {U : Set α}, IsOpen[inst✝¹] U → IsOpen[t] {s | (s ∩ U).Nonempty}
hs : ∅ ∈ (range fun x ↦ {x})ᶜ
⊢ (range fun x ↦ {x})ᶜ ∈ pure ∅

Tactic:
Filter.mem_pure

Goal state after:
case inl
α : Type u_1
inst✝¹ : TopologicalSpace α
inst✝ : T2Space α
t : TopologicalSpace (Set α)
h₁ : IsOpen[t] {∅}
h₂ : ∀ {U : Set α}, IsOpen[inst✝¹] U → IsOpen[t] {s | (s ∩ U).Nonempty}
hs : ∅ ∈ (range fun x ↦ {x})ᶜ
⊢ ∅ ∈ (range fun x ↦ {x})ᶜ
Module: Mathlib.Topology.UniformSpace.Closeds

Goal state before:
pp: case inl
α : Type u_1
inst✝ : UniformSpace α
s : Set α
hs : IsCompact s
U : Set α
hU : U ∈ {U | IsOpen[inst✝.toTopologicalSpace] U}
hs' : s ∈ 𝒫 U
⊢ 𝒫 U ∈ 𝓝 s

pp: case inr
α : Type u_1
inst✝ : UniformSpace α
s : Set α
hs : IsCompact s
U : Set α
hU : U ∈ {U | IsOpen[inst✝.toTopologicalSpace] U}
hs' : s ∈ (fun V ↦ {s | (s ∩ V).Nonempty}) U
⊢ (fun V ↦ {s | (s ∩ V).Nonempty}) U ∈ 𝓝 s

Tactic:
· obtain ⟨V : SetRel α α, hV₁, hV₂⟩ :=
      hs.nhdsSet_basis_uniformity (𝓤 α).basis_sets |>.mem_iff.mp (hU.mem_nhdsSet.mpr hs')
    filter_upwards [UniformSpace.ball_mem_nhds _ (Filter.mem_lift' hV₁)]
      with t ⟨_, ht⟩
    exact ht.trans fun x ⟨y, hy, hxy⟩ => hV₂ <| Set.mem_biUnion hy hxy

Goal state after:
case inr
α : Type u_1
inst✝ : UniformSpace α
s : Set α
hs : IsCompact s
U : Set α
hU : U ∈ {U | IsOpen[inst✝.toTopologicalSpace] U}
hs' : s ∈ (fun V ↦ {s | (s ∩ V).Nonempty}) U
⊢ (fun V ↦ {s | (s ∩ V).Nonempty}) U ∈ 𝓝 s