proposition: Fact poly1_neq0 : 1%:P != 0 :> {poly R}.
proof: Proof. by rewrite polyC_eq0 oner_neq0. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype bigop finset tuple) mathcomp(div ssralg countalg binomial)