Answer to a problem raised by J. Robinson: The arithmetic of positive or negative integers is definable from successor and divisibility

Journal of Symbolic Logic 50 (4):927-935 (1985)
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Abstract

In this paper we give a positive answer to Julia Robinson's question whether the definability of + and · from S and ∣ that she proved in the case of positive integers is extendible to arbitrary integers (cf. [JR, p. 102])

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A Mathematical Introduction to Logic.J. R. Shoenfield - 1973 - Journal of Symbolic Logic 38 (2):340-341.

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