  It is shown that, for any field F \subseteq R, any ordered vector space
structure of F^n with Riesz interpolation is given by an inductive limit of
sequence with finite stages (F^n,\F_{>= 0}^n) (where n does not change). This
relates to a conjecture of Effros and Shen, since disproven, which is given by
the same statement, except with F replaced by the integers, Z. Indeed, it shows
that although Effros and Shen's conjecture is false, it is true after tensoring
with Q.
