fact: Definition acommring := ∑ (X : commring) (R : apart X), isbinopapart R ( @op1 X ) × isbinopapart R ( @op2 X ).
imports: UniMath.Tactics.EnsureStructuredProofs UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.NaturalNumbers UniMath.Algebra.RigsAndRings UniMath.Algebra.Domains_and_Fields UniMath.NumberSystems.Integers UniMath.Algebra.Monoids