fact: Definition isDivRig_isrunit_x1 {X : rig} (is : isDivRig X) : isrunit (isDivRig_mult is) (isDivRig_one is) := rigrunax2 X.
imports: UniMath.Foundations.Sets UniMath.Algebra.RigsAndRings UniMath.Algebra.Domains_and_Fields UniMath.MoreFoundations.Tactics