proposition: Lemma fld_univalence_isweq (X Y : fld) : isweq (fld_univalence_map X Y).
proof: Proof. use isweqhomot. - exact (weqcomp (fld_univalence_weq1 X Y) (fld_univalence_weq2 X Y)). - intros e. induction e. use weqcomp_to_funcomp_app. - use weqproperty. Defined.
imports: UniMath.Algebra.Groups UniMath.Algebra.RigsAndRings