On Popa’s factorial commutant embedding problem
On Popa’s factorial commutant embedding problem
复制标题
关于Popa的阶乘交换嵌入问题
DOI:
10.1090/proc/15141
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发表时间:
2020
影响因子:
1
通讯作者:
Isaac Goldbring
中科院分区:
文献类型:
--
作者:
Isaac Goldbring
An open question of Sorin Popa asks whether or not every $R^{\mathcal{U}}$-embeddable factor admits an embedding into $R^{\mathcal{U}}$ with factorial relative commutant. We show that there is a locally universal McDuff II$_1$ factor $M$ such that every property (T) factor admits an embedding into $M^{\mathcal{U}}$ with factorial relative commutant. We also discuss how our strategy could be used to settle Popa's question for property (T) factors if a certain open question in the model theory of operator algebras has a positive solution.