proposition: Lemma mulrz_int (M : zmodType) (n : int) (x : M) : x *~ n%:~R = x *~ n.
proof: Proof. by rewrite -scalezrE scaler_int. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg countalg ssrnum) mathcomp(poly)