proposition: Lemma npoly_is_a_poly_of_size (p : npoly) : val p \is a poly_of_size n.
proof: Proof. by case: p. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice fintype tuple) mathcomp(bigop binomial finset finfun ssralg countalg finalg poly polydiv) mathcomp(perm fingroup matrix mxalgebra mxpoly vector countalg)