proposition: Lemma ltr_rat : {mono (@ratr F) : x y / x < y}.
proof: Proof. exact: leW_mono ler_rat. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order ssralg countalg div ssrnum) mathcomp(ssrint prime archimedean)