proposition: Lemma pseries_rcons pi pis gT (A : {set gT}) : pseries (rcons pis pi) A = pcore_mod A pi (pseries pis A).
proof: Proof. by rewrite /pseries rev_rcons. Qed.
imports: mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq div) mathcomp(fintype bigop finset prime fingroup morphism) mathcomp(gfunctor automorphism quotient action gproduct) mathcomp(cyclic)