proposition: Lemma Pr_ge0 E : 0 <= Pr E.
proof: Proof. exact/RleP/sumr_ge0. 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