Canonical comUnitRingType := [comUnitRingType of type].

(* Specifications: *)
Axiom idomainAxiom : GRing.IntegralDomain.axiom ringType.
Canonical idomainType := IdomainType type idomainAxiom.
Axiom fieldMixin : GRing.Field.mixin_of unitRingType.
Canonical fieldType := FieldType type fieldMixin.