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Extensions of the UHF-algebra of 2∞-type by C⁎-algebras with continuous scale
Journal of Mathematical Analysis and Applications ( IF 1.3 ) Pub Date : 2021-01-14 , DOI: 10.1016/j.jmaa.2021.124959
Cangyuan Wang

Let A be the UHF-algebra of 2-type, B be a non-unital but σ-unital stably finite simple C-algebra with real rank zero and a continuous scale. In this paper, we give a classification of the following essential extensions of A by BA:0BAEA0, up to unitary equivalence. Denote by Ext(A,BA), the abelian group of unitary equivalence classes of essential extensions of A by BA. There is a group isomorphismΓ:Ext(A,BA)KK(A,C(BA)) defined by Γ([τ]):=[τ]KK, where C(BA) is the corona algebra of BA.



中文翻译:

2的UHF-代数的扩展通过型Ç -代数与连续刻度

A为的UHF代数2类型,B是一个非单位但σ单位稳定有限的简单C-实等级为零且具有连续标度的代数。在本文中,我们给出了下列基本扩展分类一个一种0一种Ë一种0直至单一等价。表示为分机一种一种,是A by的基本扩展的unit等价类的阿贝尔群一种。有一个群体同构Γ分机一种一种ķķ一种C一种 被定义为 Γ[τ]=[τ]ķķ,在哪里 C一种 是的电晕代数 一种

更新日期:2021-01-20
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