Orderings and maximal ideals of rings of analytic functions

We prove that there is a natural injective correspondence between the maximal ideals of the ring of analytic functions on a real analytic set and those of its subring of bounded analytic functions. By describing the maximal ideals in terms of ultrafilters we see that this correspondence is surjective if and only if is compact. This approach is also useful for studying the orderings of the field of meromorphic functions on .