As s and vs are σ-additive, so are s′,s′′,v′, and v′′. (Verify!) Thus \(s^{\prime}, s^{\prime \prime} : \mathcal{M} \rightarro...As s and vs are σ-additive, so are s′,s′′,v′, and v′′. (Verify!) Thus s′,s′′:M→E are generalized measures, while v′ and v′′ are measures (≥0).