Model theory of operator algebras I: Stability
classification
🧮 math.OA
math.LO
keywords
algebraalgebrasauthorauthorschoicecommutantconsidereddepend
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Several authors have considered whether the ultrapower and the relative commutant of a C*-algebra or II_1 factor depend on the choice of the ultrafilter. We settle each of these questions, extending results of Ge-Hadwin and the first author.
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