Approximation and Markov moment problem on concrete spaces (Q743942)

The paper starts by recalling some polynomial approximation results proved by the author himself in earlier work, some of them in a improved form. He is interested to apply such results to characterize the existence of the solutions of some multidimensional vector valued moment problems, in particular to Markov moment problems. The main idea for getting the proofs is the use of the Hahn-Banach principle and the natural order relations on function and operator spaces.