Definition apbinop_pr1 {X : tightapSet} (op : apbinop X) : binop X := pr1 op.
Require Import UniMath.Foundations.Propositions. Require Import UniMath.MoreFoundations.Sets. Require Import UniMath.MoreFoundations.Tactics. Require Import UniMath.MoreFoundations.DecidablePropositions.