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arXiv 1301.4897math.OAmath.QA
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局部紧量子群上余循环诱导的C*-代数形变

Deformation of C*-algebras by cocycles on locally compact quantum groups

University of Oslo(奥斯陆大学);Oslo and Akershus University College of Applied Sciences(奥斯陆和阿克斯胡斯应用科学大学)

Sergey Neshveyev, Lars Tuset

AI总结:

该研究针对带局部紧量子群左作用的C*-代数,利用酉2-余循环定义其形变,分析正则性等条件下的同构性质与群作用关系,验证经典群情形的可积性,并结合新构造的余循环展开示例分析。

摘要:

给定一个带有局部紧量子群G左作用的C*-代数A,以及\u0026#x0047;̂上的酉2-余循环Ω,我们定义了A的一个形变A_Ω。在对Ω的若干额外技术性假设下,该构造表现良好,其中最重要的假设是正则性,即C_0(G)_Ω⋊G同构于某个希尔伯特空间上的紧算子代数。特别地,此时A_Ω稳定同构于迭代扭交叉积\u0026#x0047;̂^{op}⋉_ΩG⋉A。此外,在良好情形下,C*-代数A_Ω带有形变量子群G_Ω的左作用,且我们有同构G_Ω⋉A_Ω≅G⋉A。当G是真正的局部紧群时,我们证明G在C_0(G)_Ω=C*_r(\u0026#x0047;̂;Ω)上的作用总是可积的。作用的真性与饱和性这两个更强的假设可推出正则性。作为示例,我们对Bieliavsky等人近期构造的部分可解李群对偶上的余循环进行了初步分析,并讨论了我们的构造与Bieliavsky和Gayral的构造之间的关联。

英文摘要:

Given a C*-algebra A with a left action of a locally compact quantum group G on it and a unitary 2-cocycle Omega on \hat G, we define a deformation A_Omega of A. The construction behaves well under certain additional technical assumptions on Omega, the most important of which is regularity, meaning that C_0(G)_Omega\rtimes G is isomorphic to the algebra of compact operators on some Hilbert space. In particular, then A_Ωis stably isomorphic to the iterated twisted crossed product \hat G^{op}\ltimes_ΩG\ltimes A. Also, in good situations, the C*-algebra A_Ωcarries a left action of the deformed quantum group G_Ωand we have an isomorphism G_Ω\ltimes A_Ω\cong G\ltimes A. When G is a genuine locally compact group, we show that the action of G on C_0(G)_Omega=C*_r(\hat G;Omega) is always integrable. Stronger assumptions of properness and saturation of the action imply regularity. As an example, we make a preliminary analysis of the cocycles on the duals of some solvable Lie groups recently constructed by Bieliavsky et al., and discuss the relation of our construction to that of Bieliavsky and Gayral.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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