proposition: Lemma isapropiscommrig {X : hSet} (opp1 opp2 : binop X) : isaprop (iscommrigops opp1 opp2).
proof: Proof. apply (isofhleveldirprod 1). - apply isapropisrigops. - apply isapropiscomm. Defined.
imports: UniMath.Foundations.Sets UniMath.MoreFoundations.Propositions