We determine the Borel class of the image of a Polish space under a Borel measurable function of class η which maps open sets in the Polish space to Borel sets of additive class ξ in the range, under ...

Abstract Let ϕ be a locally upper bounded Borel measurable function on a Greenian open set Ω in ℝ𝑑 and, for every 𝑥 ∈ Ω, let 𝑣ϕ(𝑥) denote the infimum of the integrals of ϕ with respect to Jensen ...