proposition: Lemma triv_Chi : mx_rsim triv_repr 'Chi_0.
proof: Proof. Proof using. by apply/cfRepr_rsimP; rewrite cfRepr_trivE irrRepr. Qed.
imports: mathcomp(all_ssreflect) mathcomp(fingroup perm ssralg morphism perm action) mathcomp(zmodp) mathcomp(vector matrix mxalgebra ssrnum algC) mathcomp(mxrepresentation classfun character) permcomp tools partition congr cycles cycletype presentSn