fact: Definition eqrelabgrdiff (X : abmonoid) : @eqrel (abmonoiddirprod X X) := make_eqrel _ (iseqrelabgrdiff X).
imports: UniMath.MoreFoundations.Orders UniMath.MoreFoundations.Tactics UniMath.MoreFoundations.Subtypes UniMath.Algebra.BinaryOperations UniMath.Algebra.Monoids