fact: Definition Branch_of_Branch_to_Branch {T : preZFS} (x : T) (y : Branch T x) : pr1 (Upw_to_TRRGraph (preZFS_Branch T x) y) → pr1 (Upw_to_TRRGraph (pr1 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