Arithmetic definability by formulas with two quantifiers

Journal of Symbolic Logic 57 (1):1-11 (1992)
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Abstract

We give necessary conditions for a set to be definable by a formula with a universal quantifier and an existential quantifier over algebraic integer rings or algebraic number fields. From these necessary conditions we obtain some undefinability results. For example, N is not definable by such a formula over Z. This extends a previous result of R. M. Robinson

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References found in this work

Definability on Formulas With Single Quantifier.Shih-Ping Tung - 1988 - Mathematical Logic Quarterly 34 (2):105-108.
Definability on Formulas With Single Quantifier.Shih-Ping Tung - 1988 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 34 (2):105-108.

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