proposition: Lemma ge0_prc A B mu : 0 <= \P_[mu, B] A.
proof: Proof. by rewrite /prc mulr_ge0 ?invr_ge0 // ge0_pr. Qed.
imports: mathcomp(all_ssreflect all_algebra) mathcomp.classical(boolp classical_sets mathcomp_extra) xfinmap ereal reals discrete topology realseq realsum