fact: Definition islowerbound_subtype_equiv {A B : hsubtype P} : (A ≡ B) -> islowerbound_subtype A ≡ islowerbound_subtype B.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.Combinatorics.WellOrderedSets UniMath.OrderTheory.DCPOs.AlternativeDefinitions.Dcpo