fact: Definition inverse_lexicalEnumeration {n : nat} (m: ⟦n⟧ -> nat) : (∑ i : ⟦n⟧, ⟦m i⟧) ≃ ⟦stnsum m⟧ := weqstnsum1 m.
imports: UniMath.Foundations.NaturalNumbers UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions UniMath.MoreFoundations.NegativePropositions