proposition: Lemma fRN_ge0 x : 0 <= fRN x.
proof: Proof. apply: lime_ge => //; first exact: is_cvg_max_approxRN_seq. by apply: nearW => ?; exact: max_approxRN_seq_ge0. Qed.
imports: mathcomp(all_ssreflect ssralg ssrnum ssrint interval) mathcomp(finmap fingroup perm rat) mathcomp(mathcomp_extra boolp classical_sets cardinality) mathcomp(functions fsbigop set_interval) HB(structures) reals ereal signed topology numfun normedtype sequences esum measure realfun lebesgue_measure lebesgue_integral