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arXiv 2402.19461math.OAmath.GR
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群的环积类积及其冯·诺依曼代数 III:嵌入

Wreath-like products of groups and their von Neumann algebras III: Embeddings

Ionut Chifan, Adrian Ioana, Denis Osin, Bin Sun

AI总结:

本文研究具有性质 (T) 的环积类积群,完整刻画了其冯·诺依曼代数间的嵌入,并由此构造出大量两两不可嵌入的 ICC 群及仅具有内自同态的群冯·诺依曼代数。

摘要:

对于一类具有性质 (T) 的环积类积群,我们明确描述了它们的冯·诺依曼代数之间的所有嵌入。这使我们能够提供一个具有性质 (T) 的 ICC 群的连续统,其冯·诺依曼代数两两之间不可(稳定)嵌入。我们还给出了该类中仅具有内射同态的群的构造。作为一个应用,我们得到了仅允许内自同态的群冯·诺依曼代数的例子。

英文摘要:

For a class of wreath-like product groups with property (T), we describe explicitly all the embeddings between their von Neumann algebras. This allows us to provide a continuum of ICC groups with property (T) whose von Neumann algebras are pairwise non (stably) embeddable. We also give a construction of groups in this class only having inner injective homomorphisms. As an application, we obtain examples of group von Neumann algebras which admit only inner endomorphisms.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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