proposition: Fact scale_polyAl a p q : scale_poly a (p * q) = scale_poly a p * q.
proof: Proof. by rewrite !scale_polyE mulrA. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)