fact: Definition DivRig_islunit_zero: ∏ x : F, 0 + x = x := isDivRig_islunit_x0 (DivRig_isDivRig F).
imports: UniMath.Foundations.Sets UniMath.Algebra.RigsAndRings UniMath.Algebra.Domains_and_Fields UniMath.MoreFoundations.Tactics