proposition: Lemma ltrn1 n : n%:R < 1 :> R = (n < 1)%N.
proof: Proof. by rewrite -ltr_nat. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(ssrAC div fintype path bigop order finset fingroup) mathcomp(ssralg poly)