proposition: Lemma fdistC12_snd : fdistC12`2 = P`2.
proof: Proof. by rewrite /fdist_snd /fdistC12 fdistmap_comp. Qed.
imports: mathcomp(all_ssreflect ssralg fingroup perm matrix) mathcomp(all_algebra vector reals normedtype) mathcomp(mathcomp_extra boolp) mathcomp(Rstruct) ssrR logb realType_ext ssr_ext ssralg_ext bigop_ext