Non p-norm approximated Groups

Non p-norm approximated Groups
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非 p 范数近似群

DOI:
10.1007/s11854-020-0119-2
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发表时间:
2018
期刊:
Journal d'Analyse Mathématique
影响因子:
--
通讯作者:
I. Oppenheim
I. Oppenheim
中科院分区:
--
文献类型:
--
作者:
A. Lubotzky;I. Oppenheim

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在与De Chiffre, Glebsky和Thom的第一名作者的先前工作中,证明了存在一个有限呈现群,它不能被具有Frobenius范数(又称l2范数,或schatten2 -范数)的酉群U(n)的几乎同态所近似。在他的ICM18讲座中,Andreas Thom问这个结果是否可以推广到一般的Schatten- p范数。我们证明了当1 < p <∞时确实如此。
It was shown in a previous work of the first-named author with De Chiffre, Glebsky and Thom that there exists a finitely presented group which cannot be approximated by almost-homomorphisms to the unitary groups U(n) equipped with the Frobenius norms (a.k.a. as L 2 norm, or the Schatten-2-norm). In his ICM18 lecture, Andreas Thom asks if this result can be extended to general Schatten- p -norms. We show that this is indeed the case for 1 < p < ∞ .
稳定性、上同调消失和不可近似群
DOI: 10.1017/fms.2020.5
发表时间: 2020
期刊: Sigma
影响因子: --
作者:
DE CHIFFRE, MARCUS;GLEBSKY, LEV;LUBOTZKY, ALEXANDER;THOM, ANDREAS
通讯作者: THOM, ANDREAS