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Tensor product indecomposability results for existentially closed factors
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Tensor product indecomposability results for existentially closed factors

Ionut Chifan, Daniel Drimbe and Adrian Ioana
ArXiv.org
07/30/2022
DOI: 10.48550/arXiv.2208.00259
url
https://doi.org/10.48550/arXiv.2208.00259View
Preprint (Author's original)This preprint has not been evaluated by subject experts through peer review. Preprints may undergo extensive changes and/or become peer-reviewed journal articles. Open Access

Abstract

In the first part of the paper we survey several results from Popa's deformation/rigidity theory on the classification of tensor product decompositions of large natural classes of II$_1$ factors. Using a m\'elange of techniques from deformation/rigidity theory, model theory, and the recent works \cite{CIOS21,CDI22} we highlight an uncountable family of existentially closed II$_1$ factors $M$ which do not admit tensor product decompositions $M= P\bar \otimes Q$ into diffuse factors where $Q$ is full. In the last section we discuss several open problems regarding the structural theory of existentially closed factors.

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