no goals
α : Type u_1
β : Type ?u.162324
γ : Type ?u.162327
ι : Sort ?u.162330
κ : ι → Sort ?u.162335
inst✝¹ : Preorder α
inst✝ : Preorder β
s t : Set α
x : α
S : Set (Set α)
⊢ upperClosure (⋃₀ S) = ⨅ (s : Set α) (_ : s ∈ S), upperClosure s
simp_rw [sUnion_eq_biUnion, upperClosure_iUnion]