proposition: Lemma coef_take_poly m p i : (take_poly m p)`_i = if i < m then p`_i else 0.
proof: Proof. exact: coef_poly. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)