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Metric abstract elementary classes with perturbations

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Hirvonen Å., Hyttinen T.

Fundamenta Mathematicae

2012

tom 217

nr 2

123-170

We define an abstract setting suitable for investigating perturbations of metric structures generalizing the notion of a metric abstract elementary class. We show how perturbation of Hilbert spaces with an automorphism and atomic Nakano spaces with bounded exponent fit into this framework, where the perturbations are built into the definition of the class being investigated. Further, assuming homogeneity and some other properties true in the example classes, we develop a notion of independence for this setting and show that it satisfies the usual independence axioms. Finally we define an isolation notion. Although it remains open whether this isolation gives any reasonable form of primeness, we prove that dominance works.

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1 Fundamenta Mathematicae

1 Hirvonen Å.

1 Hyttinen T.

1 2012

Wyniki wyszukiwania

Metric abstract elementary classes with perturbations