fact: Definition uni_fix (X : 𝒫 (𝒫 (𝒫 A))) : ((𝒫 (𝒫 (𝒫 A))) : Type@{A}).
imports: HoTT(TruncType ExcludedMiddle Modalities.ReflectiveSubuniverse abstract_algebra HSet) HoTT(PropResizing.PropResizing) HoTT(Spaces.Card) HoTT.Sets(Ordinals Powers)