proposition: Lemma pr_eq_set1 (X : {RV P -> A}) x : `Pr[ X \in [set x] ] = `Pr[ X = x ].
proof: Proof. by rewrite pr_inE' Pr_set1 pr_eqE'. 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