proposition: Lemma isapartafldfracapartrel : isapart afldfracapartrel.
proof: Proof. intros. split. - apply isirreflquotrel. exact isirreflafldfracapartrelpre. - split. + apply issymmquotrel. exact issymmafldfracapartrelpre. + apply iscotransquotrel. exact iscotransafldfracapartrelpre. Defined.
imports: UniMath.PAdics.lemmas UniMath.Algebra.RigsAndRings UniMath.Algebra.Domains_and_Fields