proposition: Lemma ltr0z n : (0 < n%:~R :> R) = (0 < n).
proof: Proof. by rewrite pmulrz_rgt0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)