proposition: Lemma starletter_letter x : starletter (Bit x) x.
proof: Proof. by rewrite /starletter eqxx orbC. Qed.
imports: mathcomp(all_ssreflect ssralg fingroup finalg perm zmodp) mathcomp(matrix) ssr_ext ssralg_ext num_occ f2 ssrR hamming tanner linearcode