Definition op {X : apsetwithbinop} : binop X := op (X := apsetwithbinop_setwithbinop X).
Require Import UniMath.Foundations.Propositions. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions.