EN
Let X be a reflexive Banach space and (Ω,𝓐,μ) be a probability measure space. Let T: M(μ;X) → M(μ;X) be a linear operator, where M(μ;X) is the space of all X-valued strongly measurable functions on (Ω,𝓐,μ). We assume that T is continuous in the sense that if (fₙ) is a sequence in M(μ;X) and $lim_{n→∞} fₙ = f$ in measure for some f ∈ M(μ;X), then also $lim_{n→∞} Tfₙ = Tf$ in measure. Then we consider the functional equation f = (T-I)h, where f ∈ M(μ;X) is given. We obtain several conditions for the existence of h ∈ M(μ;X) satisfying f = (T-I)h.