proposition: Lemma real_ltr_distlDr x y e : x - y \is real -> `|x - y| < e -> x < y + e.
proof: Proof. by move=> ?; rewrite real_ltr_distl // => /andP[]. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)