Korovkin theory for vector-valued functions on a locally compact space (Q390686)

The author considers ordered spaces of continuous vector-valued functions on a locally compact Hausdorff space, equipped with appropriate locally convex topologies. Using suitable sets of such functions as test systems, a Korovkin-type approximation theorem for equicontinuous nets of positive operators is established. As in the classical theory, the Korovkin closure is characterized both through envelopes of functions and through measure theoretical conditions.