Definition isdecabgrdiffrel (X : abmonoid) {L : hrel X} (is : isbinophrel L) (isi : isinvbinophrel L) (isl : isdecrel L) : isdecrel (abgrdiffrel X is). Proof. refine (isdecquotrel _ _). apply isdecabgrdiffrelint. - apply isi. - apply isl. Defined.
Require Import UniMath.MoreFoundations.Orders. Require Import UniMath.MoreFoundations.Subtypes.