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Results tagged with model-theory
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user 18658
Model theory is the branch of mathematical logic which deals with the connection between a formal language and its interpretations, or models.
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Definable subsets of the integers as an abelian subgroup?
Consider the integers as a first-order structure in the language {0,+,-} of abelian groups. I suspect that the collection of definable subsets (without parameters) of this structure is an algebra cont …
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