proposition: Lemma pradical_cyclic : cyclic G.
proof: Proof. by apply/prime_cyclic; rewrite order_galois_pradical. 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)