proposition: Lemma cPrE0 (E : {set A}) : `Pr_[E | set0] = 0.
proof: Proof. by rewrite /cPr setI0 Pr_set0 div0R. 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