Theorem: Seminorm.continuous_iSup
File: Mathlib/Analysis/LocallyConvex/Barrelled.lean

tactic: rw [← Seminorm.coe_iSup_eq bdd]
state_before: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ Continuous (⨆ i, ⇑(p i))
state_after: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ Continuous ⇑(⨆ i, p i)

tactic: refine Seminorm.continuous_of_lowerSemicontinuous _ ?_
state_before: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ Continuous ⇑(⨆ i, p i)
state_after: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ LowerSemicontinuous ⇑(⨆ i, p i)

tactic: rw [Seminorm.coe_iSup_eq bdd]
state_before: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ LowerSemicontinuous ⇑(⨆ i, p i)
state_after: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ LowerSemicontinuous (⨆ i, ⇑(p i))

tactic: rw [Seminorm.bddAbove_range_iff] at bdd
state_before: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : BddAbove (range p)
⊢ LowerSemicontinuous (⨆ i, ⇑(p i))
state_after: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : ∀ (x : E), BddAbove (range fun i => (p i) x)
⊢ LowerSemicontinuous (⨆ i, ⇑(p i))

tactic: convert lowerSemicontinuous_ciSup (f := fun i x ↦ p i x) bdd (fun i ↦ (hp i).lowerSemicontinuous)
state_before: ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : ∀ (x : E), BddAbove (range fun i => (p i) x)
⊢ LowerSemicontinuous (⨆ i, ⇑(p i))
state_after: case h.e'_5.h
ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : ∀ (x : E), BddAbove (range fun i => (p i) x)
x✝ : E
⊢ (⨆ i, ⇑(p i)) x✝ = ⨆ i, (p i) x✝

tactic: exact iSup_apply
state_before: case h.e'_5.h
ι : Sort u_1
𝕜 : Type u_2
E : Type u_3
inst✝⁴ : NormedField 𝕜
inst✝³ : AddCommGroup E
inst✝² : Module 𝕜 E
inst✝¹ : TopologicalSpace E
inst✝ : BarrelledSpace 𝕜 E
p : ι → Seminorm 𝕜 E
hp : ∀ (i : ι), Continuous ⇑(p i)
bdd : ∀ (x : E), BddAbove (range fun i => (p i) x)
x✝ : E
⊢ (⨆ i, ⇑(p i)) x✝ = ⨆ i, (p i) x✝
state_after: no goals