fact: Definition Prod (s : seq letter) := if N(Bit 0 | s) > N(Bit 1 | s) then Bit 0 else if N(Bit 0 | s) < N(Bit 1 | s) then Bit 1 else Star.
imports: mathcomp(all_ssreflect ssralg fingroup finalg perm zmodp) mathcomp(matrix) ssr_ext ssralg_ext num_occ f2 ssrR hamming tanner linearcode