Theorem: equicontinuous_of_equicontinuousAt_one
File: Mathlib/Topology/Algebra/Equicontinuity.lean

tactic: rw [equicontinuous_iff_continuous]
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : EquicontinuousAt (DFunLike.coe ∘ F) 1
⊢ Equicontinuous (DFunLike.coe ∘ F)
state_after: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : EquicontinuousAt (DFunLike.coe ∘ F) 1
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))

tactic: rw [equicontinuousAt_iff_continuousAt] at hf
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : EquicontinuousAt (DFunLike.coe ∘ F) 1
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))
state_after: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))

tactic: let φ : G →* (ι →ᵤ M) :=
  { toFun := swap ((↑) ∘ F)
    map_one' := by dsimp [UniformFun]; ext; exact map_one _
    map_mul' := fun a b => by dsimp [UniformFun]; ext; exact map_mul _ _ _ }
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))
state_after: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
φ : G →* ι →ᵤ M := { toFun := swap (DFunLike.coe ∘ F), map_one' := ⋯, map_mul' := ⋯ }
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))

tactic: exact continuous_of_continuousAt_one φ hf
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
φ : G →* ι →ᵤ M := { toFun := swap (DFunLike.coe ∘ F), map_one' := ⋯, map_mul' := ⋯ }
⊢ Continuous (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F))
state_after: no goals

tactic: ext
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
⊢ swap (DFunLike.coe ∘ F) 1 = 1
state_after: case h
ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
x✝ : ι
⊢ swap (DFunLike.coe ∘ F) 1 x✝ = 1 x✝

tactic: exact map_one _
state_before: case h
ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
x✝ : ι
⊢ swap (DFunLike.coe ∘ F) 1 x✝ = 1 x✝
state_after: no goals

tactic: dsimp [UniformFun]
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
a b : G
⊢ { toFun := swap (DFunLike.coe ∘ F), map_one' := ⋯ }.toFun (a * b) =
    { toFun := swap (DFunLike.coe ∘ F), map_one' := ⋯ }.toFun a *
      { toFun := swap (DFunLike.coe ∘ F), map_one' := ⋯ }.toFun b
state_after: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
a b : G
⊢ swap (DFunLike.coe ∘ F) (a * b) = swap (DFunLike.coe ∘ F) a * swap (DFunLike.coe ∘ F) b

tactic: ext
state_before: ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
a b : G
⊢ swap (DFunLike.coe ∘ F) (a * b) = swap (DFunLike.coe ∘ F) a * swap (DFunLike.coe ∘ F) b
state_after: case h
ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
a b : G
x✝ : ι
⊢ swap (DFunLike.coe ∘ F) (a * b) x✝ = (swap (DFunLike.coe ∘ F) a * swap (DFunLike.coe ∘ F) b) x✝

tactic: exact map_mul _ _ _
state_before: case h
ι : Type u_1
G : Type u_2
M : Type u_3
hom : Type u_4
inst✝⁷ : TopologicalSpace G
inst✝⁶ : UniformSpace M
inst✝⁵ : Group G
inst✝⁴ : Group M
inst✝³ : TopologicalGroup G
inst✝² : UniformGroup M
inst✝¹ : FunLike hom G M
inst✝ : MonoidHomClass hom G M
F : ι → hom
hf : ContinuousAt (⇑UniformFun.ofFun ∘ swap (DFunLike.coe ∘ F)) 1
a b : G
x✝ : ι
⊢ swap (DFunLike.coe ∘ F) (a * b) x✝ = (swap (DFunLike.coe ∘ F) a * swap (DFunLike.coe ∘ F) b) x✝
state_after: no goals