proposition: Lemma fdistbindE x : fdistbind x = \sum_(a in A) p a * (g a) x.
proof: Proof. by rewrite /fdistbind; unlock; rewrite ffunE. 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