Lemma iseqrelabgrdiffrel (X : abmonoid) {L : hrel X} (is : isbinophrel L) (isl : iseqrel L) : iseqrel (abgrdiffrel X is). Proof. refine (iseqrelquotrel _ _). apply iseqrelabgrdiffrelint. - apply is. - apply isl. Defined.
Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Subtypes.