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arxiv: 1304.7797 · v1 · pith:3IS5W2SAnew · submitted 2013-04-29 · 🧮 math.LO

Definable closure in randomizations

classification 🧮 math.LO
keywords completedefinablesorttheoryclosureconditionscontinuouselement
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The randomization of a complete first order theory T is the complete continuous theory T^R with two sorts, a sort for random elements of models of T, and a sort for events in an underlying probability space. We give necessary and sufficient conditions for an element to be definable over a set of parameters in a model of T^R.

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