Perturbations of intermediate C∗‐subalgebras for simple C∗‐algebras

Perturbations of intermediate C∗‐subalgebras for simple C∗‐algebras
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简单 C*-代数的中间 C*-子代数的扰动

DOI:
10.1112/blms/bdu001
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发表时间:
2013
影响因子:
0.9
通讯作者:
Y. Watatani
Y. Watatani
中科院分区:
数学3区
文献类型:
--
作者:
Shoji Ino;Y. Watatani

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研究了单C <$-代数包含的中间C <$-子代数的一致扰动.如果一个有单位元的单C-代数有一个有限指标的单C-子代数,则充分接近的中间C-子代数是酉等价的。这些中间C-子代数不一定是核的。在相对交换子代数中可以选择酉。一个直接推论如下:如果相对交换子是平凡的,则中间C-子代数的集合是有限集合。
We study uniform perturbations of intermediate C ∗ ‐subalgebras of inclusions of simple C ∗ ‐algebras. If a unital simple C ∗ ‐algebra has a simple C ∗ ‐subalgebra of finite index, then sufficiently close intermediate C ∗ ‐subalgebras are unitarily equivalent. These intermediate C ∗ ‐subalgebras need not be nuclear. The unitary can be chosen in the relative commutant algebra. An immediate corollary is the following: If the relative commutant is trivial, then the set of intermediate C ∗ ‐subalgebras is a finite set.
DOI: 10.1007/s11511-012-0075-5
发表时间: 2009-10
期刊: Acta Mathematica
影响因子: 3.7
作者:
Erik Christensen;A. Sinclair;Roger R. Smith;Stuart White;W. Winter
通讯作者: Erik Christensen;A. Sinclair;Roger R. Smith;Stuart White;W. Winter