Lemma ispoabgrdiffrel (X : abmonoid) {L : hrel X} (is : isbinophrel L) (isl : ispreorder L) : ispreorder (abgrdiffrel X is). Proof. refine (ispoquotrel _ _). apply ispoabgrdiffrelint. - apply is. - apply isl. Defined.
Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Subtypes.