Potential isomorphism and semi-proper trees

Abstract

We study a notion of potential isomorphism, where two structures are said to be potentially isomorphic if they are isomorphic in some generic extension that preserves stationary sets and does not add new sets of cardinality less than the cardinality of the models. We introduce the notion of weakly semiproper trees, and note that there is a strong connection… (More)

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Cite this paper

@inproceedings{Hellsten2002PotentialIA, title={Potential isomorphism and semi-proper trees}, author={Alex Hellsten and Tapani Hyttinen and Saharon Shelah}, year={2002} }