proposition: Fact cfextprodr_is_linear h : linear (cfextprodr h : 'CF(G) -> 'CF(setX G H)).
proof: Proof. Proof using. move=> /= a g1 g2; rewrite !cfextprodrE. apply/cfunP=> /= x. by rewrite !cfunE !mulrDl -mulrA. 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