• Artículo
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      Existentially Closed Models in the Framework of Arithmetic 

      Adamowicz, Zofia; Cordón Franco, Andrés; Lara Martín, Francisco Félix (The Association for Symbolic Logic, 2016)
      We prove that the standard cut is definable in each existentially closed model of IΔ0 + exp by a (parameter free) П1–formula. ...