proposition: Lemma pr_eq_unit (U : finType) (P : real_realType.-fdist U) : `Pr[ (unit_RV P) = tt ] = 1.
proof: Proof. by rewrite pr_eqE'; apply/eqP/fdist1P; case. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum matrix) mathcomp(Rstruct reals) Reals Lra ssrR Reals_ext realType_ext logb ssr_ext ssralg_ext bigop_ext fdist