fact: Definition BEC_IO m n (H : 'M['F_2]_(m, n)) c y := syndrome H c = 0 /\ map_mx Bit c <=m y.
imports: mathcomp(all_ssreflect ssralg fingroup finalg perm zmodp) mathcomp(matrix) ssr_ext ssralg_ext num_occ f2 ssrR hamming tanner linearcode