Let D be a domain in Rn
defined by a finite number of strict polynomial inequalities. Then the Nash ring AD is
the ring of real valued algebraic analytic functions defined on D. In this paper, it is
shown that AD is Noetherian and has a nullstellensatz. For 𝒫 a prime ideal of
AD,AD∕𝒫 is said to be rank one orderable if its quotient field can be ordered over R
so that it has essentially one infinitesimal. Then AD∕𝒫 is rank one orderable if and
only if 𝒫 equals the set of functions in AD which vanish on the zero set of 𝒫 in
D.