proposition: Lemma root_p : root (p ^^ ratr) =i rp.
proof: Proof. by move=> x; rewrite -topredE/= (eqp_root ratr_p) root_prod_XsubC. 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)