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arxiv: 1511.00982 · v4 · pith:NLCAFEYXnew · submitted 2015-11-03 · 🧮 math.LO

The Gamma-Ultraproduct and Averageable Classes

classification 🧮 math.LO
keywords gammaultraproductseveralalwaysaverageablecalledclassesconditions
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We consider an ultraproduct that is designed to omit a fixed set of unary types $\Gamma$, called the $\Gamma$-ultraproduct. The $\Gamma$-ultraproduct is not always well-behaved, but we discuss several general conditions under which it is and several examples.

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