Key words m-ordered differential fields, model companion, geometric axiomatization.
MSC (2000) 03C10, 12J15In his Ph. D. thesis [7], L. van den Dries studied the model theory of fields (more precisely domains) with finitely many orderings and valuations where all open sets according to the topology defined by an order or a valuation is globally dense according with all other orderings and valuations. Van den Dries proved that the theory of these fields is companionable and that the theory of the companion is decidable (see also [8]).In this paper we study the case where the fields are expanded with finitely many orderings and an independent derivation. We show that the theory of these fields still admits a model companion in the language L D <,m = {+, −, ·, D, <1, . . . ,
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