proposition: Lemma pr_in_domin_RV2 E F : `Pr[ X \in E] = 0 -> `Pr[ [% X, Y] \in E `* F] = 0.
proof: Proof. move=> H; by rewrite pr_inE' Pr_domin_setX // fst_RV2 -pr_inE'. 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