proposition: Lemma Lnorm_ge0 p f : 0 <= 'N_p[f].
proof: Proof. rewrite unlock; move: p => [r/=|/=|//]. by case: ifPn => // r0; exact: poweR_ge0. by case: ifPn => // /ess_sup_ge0; apply => t/=. Qed.
imports: HB(structures) mathcomp(all_ssreflect ssralg ssrnum ssrint interval finmap) mathcomp(mathcomp_extra boolp classical_sets functions) mathcomp(cardinality fsbigop ) signed reals ereal topology normedtype sequences real_interval esum measure lebesgue_measure lebesgue_integral numfun exp convex itv