fact: Definition foldright {E} (m : binop E) (e : E) {n : nat} (x: ⟦n⟧ -> E) : E.
imports: UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions