proposition: Lemma alpha_map {A} F (l : seq A) : alpha (map F l) = \big[alpha_op/(R1,R0)]_(i <- l) F i.
proof: Proof. by rewrite /alpha foldrE big_map. Qed.
imports: Wf_nat Init.Wf Recdef Reals mathcomp(all_ssreflect perm zmodp matrix ssralg) mathcomp(Rstruct) ssrR Reals_ext ssr_ext ssralg_ext bigop_ext f2 fdist channel pproba linearcode subgraph_partition tanner tanner_partition summary ldpc checksum ldpc_algo