proposition: Lemma is_cgenE g : g \in 'cgen = non0_codeword_lowest_deg C g.
proof: Proof. by []. Qed.
imports: mathcomp(all_ssreflect ssralg poly polydiv fingroup perm) mathcomp(finalg zmodp matrix mxalgebra mxpoly polydiv vector) ssralg_ext poly_ext f2 hamming linearcode dft