Theorem: NonUnitalStarSubalgebra.iSupLift_of_mem
File: Mathlib/Algebra/Star/NonUnitalSubalgebra.lean

Proof steps:
state_before: F : Type v'
R' : Type u'
R : Type u
A : Type v
B : Type w
C : Type w'
inst✝¹⁷ : CommSemiring R
inst✝¹⁶ : StarRing R
inst✝¹⁵ : NonUnitalSemiring A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module R A
inst✝¹² : IsScalarTower R A A
inst✝¹¹ : SMulCommClass R A A
inst✝¹⁰ : StarModule R A
inst✝⁹ : NonUnitalSemiring B
inst✝⁸ : StarRing B
inst✝⁷ : Module R B
inst✝⁶ : IsScalarTower R B B
inst✝⁵ : SMulCommClass R B B
inst✝⁴ : StarModule R B
inst✝³ : FunLike F A B
inst✝² : NonUnitalAlgHomClass F R A B
inst✝¹ : NonUnitalStarAlgHomClass F R A B
S : NonUnitalStarSubalgebra R A
ι : Type u_1
inst✝ : Nonempty ι
K : ι → NonUnitalStarSubalgebra R A
dir : Directed (fun x x_1 => x ≤ x_1) K
f : (i : ι) → ↥(K i) →⋆ₙₐ[R] B
hf : ∀ (i j : ι) (h : K i ≤ K j), f i = (f j).comp (inclusion h)
T : NonUnitalStarSubalgebra R A
hT : T = iSup K
i : ι
x : ↥T
hx : ↑x ∈ K i
⊢ (iSupLift K dir f hf T hT) x = (f i) ⟨↑x, hx⟩
state_after: F : Type v'
R' : Type u'
R : Type u
A : Type v
B : Type w
C : Type w'
inst✝¹⁷ : CommSemiring R
inst✝¹⁶ : StarRing R
inst✝¹⁵ : NonUnitalSemiring A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module R A
inst✝¹² : IsScalarTower R A A
inst✝¹¹ : SMulCommClass R A A
inst✝¹⁰ : StarModule R A
inst✝⁹ : NonUnitalSemiring B
inst✝⁸ : StarRing B
inst✝⁷ : Module R B
inst✝⁶ : IsScalarTower R B B
inst✝⁵ : SMulCommClass R B B
inst✝⁴ : StarModule R B
inst✝³ : FunLike F A B
inst✝² : NonUnitalAlgHomClass F R A B
inst✝¹ : NonUnitalStarAlgHomClass F R A B
S : NonUnitalStarSubalgebra R A
ι : Type u_1
inst✝ : Nonempty ι
K : ι → NonUnitalStarSubalgebra R A
dir : Directed (fun x x_1 => x ≤ x_1) K
f : (i : ι) → ↥(K i) →⋆ₙₐ[R] B
hf : ∀ (i j : ι) (h : K i ≤ K j), f i = (f j).comp (inclusion h)
i : ι
x : ↥(iSup K)
hx : ↑x ∈ K i
⊢ (iSupLift K dir f hf (iSup K) ⋯) x = (f i) ⟨↑x, hx⟩
tactic: subst hT
state_before: F : Type v'
R' : Type u'
R : Type u
A : Type v
B : Type w
C : Type w'
inst✝¹⁷ : CommSemiring R
inst✝¹⁶ : StarRing R
inst✝¹⁵ : NonUnitalSemiring A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module R A
inst✝¹² : IsScalarTower R A A
inst✝¹¹ : SMulCommClass R A A
inst✝¹⁰ : StarModule R A
inst✝⁹ : NonUnitalSemiring B
inst✝⁸ : StarRing B
inst✝⁷ : Module R B
inst✝⁶ : IsScalarTower R B B
inst✝⁵ : SMulCommClass R B B
inst✝⁴ : StarModule R B
inst✝³ : FunLike F A B
inst✝² : NonUnitalAlgHomClass F R A B
inst✝¹ : NonUnitalStarAlgHomClass F R A B
S : NonUnitalStarSubalgebra R A
ι : Type u_1
inst✝ : Nonempty ι
K : ι → NonUnitalStarSubalgebra R A
dir : Directed (fun x x_1 => x ≤ x_1) K
f : (i : ι) → ↥(K i) →⋆ₙₐ[R] B
hf : ∀ (i j : ι) (h : K i ≤ K j), f i = (f j).comp (inclusion h)
i : ι
x : ↥(iSup K)
hx : ↑x ∈ K i
⊢ (iSupLift K dir f hf (iSup K) ⋯) x = (f i) ⟨↑x, hx⟩
state_after: F : Type v'
R' : Type u'
R : Type u
A : Type v
B : Type w
C : Type w'
inst✝¹⁷ : CommSemiring R
inst✝¹⁶ : StarRing R
inst✝¹⁵ : NonUnitalSemiring A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module R A
inst✝¹² : IsScalarTower R A A
inst✝¹¹ : SMulCommClass R A A
inst✝¹⁰ : StarModule R A
inst✝⁹ : NonUnitalSemiring B
inst✝⁸ : StarRing B
inst✝⁷ : Module R B
inst✝⁶ : IsScalarTower R B B
inst✝⁵ : SMulCommClass R B B
inst✝⁴ : StarModule R B
inst✝³ : FunLike F A B
inst✝² : NonUnitalAlgHomClass F R A B
inst✝¹ : NonUnitalStarAlgHomClass F R A B
S : NonUnitalStarSubalgebra R A
ι : Type u_1
inst✝ : Nonempty ι
K : ι → NonUnitalStarSubalgebra R A
dir : Directed (fun x x_1 => x ≤ x_1) K
f : (i : ι) → ↥(K i) →⋆ₙₐ[R] B
hf : ∀ (i j : ι) (h : K i ≤ K j), f i = (f j).comp (inclusion h)
i : ι
x : ↥(iSup K)
hx : ↑x ∈ K i
⊢ Set.iUnionLift (fun i => ↑(K i)) (fun i x => (f i) x) ⋯ ↑(iSup K) ⋯ x = (f i) ⟨↑x, hx⟩
tactic: dsimp [iSupLift]
state_before: F : Type v'
R' : Type u'
R : Type u
A : Type v
B : Type w
C : Type w'
inst✝¹⁷ : CommSemiring R
inst✝¹⁶ : StarRing R
inst✝¹⁵ : NonUnitalSemiring A
inst✝¹⁴ : StarRing A
inst✝¹³ : Module R A
inst✝¹² : IsScalarTower R A A
inst✝¹¹ : SMulCommClass R A A
inst✝¹⁰ : StarModule R A
inst✝⁹ : NonUnitalSemiring B
inst✝⁸ : StarRing B
inst✝⁷ : Module R B
inst✝⁶ : IsScalarTower R B B
inst✝⁵ : SMulCommClass R B B
inst✝⁴ : StarModule R B
inst✝³ : FunLike F A B
inst✝² : NonUnitalAlgHomClass F R A B
inst✝¹ : NonUnitalStarAlgHomClass F R A B
S : NonUnitalStarSubalgebra R A
ι : Type u_1
inst✝ : Nonempty ι
K : ι → NonUnitalStarSubalgebra R A
dir : Directed (fun x x_1 => x ≤ x_1) K
f : (i : ι) → ↥(K i) →⋆ₙₐ[R] B
hf : ∀ (i j : ι) (h : K i ≤ K j), f i = (f j).comp (inclusion h)
i : ι
x : ↥(iSup K)
hx : ↑x ∈ K i
⊢ Set.iUnionLift (fun i => ↑(K i)) (fun i x => (f i) x) ⋯ ↑(iSup K) ⋯ x = (f i) ⟨↑x, hx⟩
state_after: no goals
tactic: apply Set.iUnionLift_of_mem