In this paper we study the theory of ordered differential fields (CDO); in other words, the theory obtained adding the order axioms for a field to "differential field" 's axioms. If we consider a model K of such theory and we "forget" order, we know that such model is embedded in its differential closure. In a such closure, we can consider the set of real fields. Such a set has maximal elements (with respect to inclusion). We call CDO* the theory of so obtained maximal elements, for all (CDO). If we neglect derivation, models of CDO* are real closed and then ordered. So we can prove that CDO* is the model completion of CDO. We find the axioms of CDO*, too. Finally, we find a method for eliminating quantifiers (for CDO*) in the formulas containing only inequalities.
@article{RLINA_1975_8_59_5_322_0, author = {Francesco Lacava}, title = {Teoria dei campi differenziali ordinati}, journal = {Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti}, volume = {59}, year = {1975}, pages = {322-327}, zbl = {0353.02032}, mrnumber = {0480009}, language = {it}, url = {http://dml.mathdoc.fr/item/RLINA_1975_8_59_5_322_0} }
Lacava, Francesco. Teoria dei campi differenziali ordinati. Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti, Tome 59 (1975) pp. 322-327. http://gdmltest.u-ga.fr/item/RLINA_1975_8_59_5_322_0/
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