proposition: Lemma numq_lt0 x : (numq x < 0) = (x < 0).
proof: Proof. by rewrite !ltNge numq_ge0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop order ssralg countalg div ssrnum) mathcomp(ssrint prime archimedean)