fact: Definition WOSrel {X:hSet} (S : WOSubset X) : hrel (carrier_subset (WOSubset_to_subtype S)) := pr12 S.
imports: UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.MoreFoundations.AxiomOfChoice UniMath.Combinatorics.OrderedSets