proposition: Lemma cfextprodMnr h g n : g \ox (h *+ n) = (g \ox h) *+ n.
proof: Proof. Proof using. by rewrite linearMn. Qed.
imports: HB(structures) mathcomp(all_ssreflect) mathcomp(ssralg fingroup morphism perm gproduct) mathcomp(ssrnum matrix vector mxalgebra algC) mathcomp(classfun character mxrepresentation) tools ordcast partition sorted permcomp cycles cycletype permcent