fact: Definition TOeq_to_refl {X:hSet} (S : TOSubset X) : ∀ s t : carrier_subset S, s = t ⇒ s ≤ t.
imports: UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.MoreFoundations.AxiomOfChoice UniMath.Combinatorics.OrderedSets