proposition: Lemma poly_example_neq0 : poly_example != 0.
proof: Proof. by rewrite -size_poly_eq0 size_poly_example. Qed.
imports: HB(structures) mathcomp(all_ssreflect all_fingroup all_algebra) mathcomp(all_solvable all_field polyrcf) Abel(various classic_ext map_gal algR) Abel(char0 cyclotomic_ext real_closed_ext)