fact: Definition Up_to_Up_inv (T : Tree) (x : pr11 T) (y : pr11 (Up x)) : pr1 (Upw_to_TRRGraph (Up x) y) → pr1 (Upw_to_TRRGraph T (pr1 y)).
imports: UniMath.Foundations.PartB UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.Foundations.HLevels UniMath.Combinatorics.WellOrderedSets UniMath.Combinatorics.OrderedSets UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.Propositions