fact: Definition op {X : apsetwithbinop} : binop X := op (X := apsetwithbinop_setwithbinop X).
imports: UniMath.Algebra.BinaryOperations UniMath.Foundations.Propositions UniMath.MoreFoundations.Sets UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.DecidablePropositions