dorsal/arxiv
View SchemaClassification of Invariant Subalgebras in a class of factors with property (T)
| Authors | Yongle Jiang, Hongyi Li |
|---|---|
| Categories | |
| ArXiv ID | 2601.06353vv1 |
| URL | https://arxiv.org/abs/2601.06353 |
| License | http://creativecommons.org/licenses/by/4.0/ |
Abstract
Let $n\geq 2$ and $G_n=\mathbb{Z}^n\rtimes SL_n(\mathbb{Z})$. We classify all $G_n$-invariant von Neumann subalgebras in $L(G_n)$. For $n=2$, this gives an alternative proof of the previous result of Jiang-Liu. For $n\geq 3$, this gives the first class of property (T) groups without the invariant subalgebras rigidity property but invariant subalgebras in the corresponding group factors can still be classified. As a corollary, $L(G_n)$ admits a unique maximal Haagerup $G_n$-invariant von Neumann subalgebra.
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"abstract": "Let $n\\geq 2$ and $G_n=\\mathbb{Z}^n\\rtimes SL_n(\\mathbb{Z})$. We classify all $G_n$-invariant von Neumann subalgebras in $L(G_n)$. For $n=2$, this gives an alternative proof of the previous result of Jiang-Liu. For $n\\geq 3$, this gives the first class of property (T) groups without the invariant subalgebras rigidity property but invariant subalgebras in the corresponding group factors can still be classified. As a corollary, $L(G_n)$ admits a unique maximal Haagerup $G_n$-invariant von Neumann subalgebra.",
"arxiv_id": "2601.06353",
"authors": [
"Yongle Jiang",
"Hongyi Li"
],
"categories": [
"math.OA"
],
"license": "http://creativecommons.org/licenses/by/4.0/",
"title": "Classification of Invariant Subalgebras in a class of factors with property (T)",
"url": "https://arxiv.org/abs/2601.06353",
"version": "v1"
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