2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/66586This paper has been withdrawn by the authors because M. Aschenbrenner pointed out that the proof of theorem 3.1 was incorrect.This paper has been withdrawnCommutative AlgebraAlgebraic Geometry13B40 (Primary) 14B12 (Secondary)text