proposition: Lemma pseries_char pis gT (G : {group gT}) : pseries pis G \char G.
proof: Proof. exact: gFchar. 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)