proposition: Lemma Zp_isom : isom (Zp #[a]) <[a]> Zpm.
proof: Proof. by apply/isomP; rewrite injm_Zpm im_Zpm. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice div) mathcomp(fintype bigop prime finset fingroup morphism) mathcomp(perm automorphism quotient gproduct ssralg) mathcomp(finalg zmodp poly)