fact: Definition Directed_family (P : Poset) : UU := ∑ (I : UU), ∑ (p : I -> P), isdirected p.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.WellOrderedSets UniMath.OrderTheory.DCPOs.AlternativeDefinitions.Dcpo