proposition: Lemma measurable_itv_bnd_infty b x : G.-sigma.-measurable [set` Interval (BSide b x) +oo%O].
proof: Proof. case: b; last by apply: sub_sigma_algebra; eexists; reflexivity. rewrite itv_c_inftyEbigcap; apply: bigcapT_measurable => k. by apply: sub_sigma_algebra; eexists; reflexivity. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop) reals ereal signed topology numfun normedtype HB(structures) sequences esum measure real_interval realfun exp lebesgue_stieltjes_measure