proposition: Lemma ltrgtP x y : comparer x y (min y x) (min x y) (max y x) (max x y) `|x - y| `|y - x| (y == x) (x == y) (x >= y) (x <= y) (x > y) (x < y) .
proof: Proof. exact: real_ltgtP. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)