fact: Definition myrel (i j : id') : bool := match i, j with | inl i, inr j => F i j | inr j, inl i => F i j | _, _ => false end.
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