proposition: Lemma sign_charP : sign_char \is a linear_char.
proof: Proof. by rewrite -cfRepr_sign cfRepr1_lin_char. 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