Lemma iseqrelabgrdiffrelint (X : abmonoid) {L : hrel X} (is : isbinophrel L) (isl : iseqrel L) : iseqrel (abgrdiffrelint X L). Proof. exists (ispoabgrdiffrelint X is (pr1 isl)). apply (issymmabgrdiffrelint X is (pr2 isl)). Defined.
Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Subtypes.