proposition: Lemma cfRepr_triv : cfRepr triv_repr = 1.
proof: Proof. Proof using. rewrite -cfunP => s. by rewrite cfunE cfun1E !inE mulr1n mxtrace1. 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