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