fact: Definition sub_initial {X:hSet} {S : hsubtype X} {T : TOSubset X} (le : S ⊆ T) : hProp := ∀ (s t : X) (Ss : S s) (Tt : T t), TOSrel T (t,,Tt) (s,,le s Ss) ⇒ S t.
imports: UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.Propositions UniMath.MoreFoundations.Subtypes UniMath.MoreFoundations.Sets UniMath.MoreFoundations.AxiomOfChoice UniMath.Combinatorics.OrderedSets