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arXiv 0905.3960math.GR
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圈积的真作用及其推广

Proper actions of wreath products and generalizations

Yves Cornulier, Yves Stalder, Alain Valette

摘要:

研究了希尔伯特空间中Haagerup性质和粗可嵌入性在某些半直积下的稳定性。特别地,我们证明了它们在取标准圈积时是稳定的。我们的建设还允许在一个标准的圈积的子集与相对属性T的表征。

英文摘要:

We study stability properties of the Haagerup property and of coarse embeddability in a Hilbert space, under certain semidirect products. In particular, we prove that they are stable under taking standard wreath products. Our construction also allows for a characterization of subsets with relative Property T in a standard wreath product.

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