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