proposition: Lemma polyCn (R : ringType) n : n%:R%:P = n%:R :> {poly R}.
proof: Proof. by rewrite rmorph_nat. 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)