arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1503.00663math.OA
收藏

范畴叉积对偶的三种形式

Three versions of categorical crossed-product duality

S. Kaliszewski, Tron Omland, John Quigg

摘要:

在这部分简要的文件中,我们比较了三种不同类别的C* 代数,其中交叉产品的对偶可以制定,无论是行动和局部紧群的相互作用。在这些范畴中,同构分别对应于C* 代数-代数同构、不可约双模和外共轭。在每种情况下,一个变化的不动点函子,产生于经典的Landstad对偶是用来获得一个准逆的交叉产品函子。为了比较各种情况下,我们描述了一个正式的方式,我们认为不动点函子作为一个“反转”的过程中形成一个交叉产品。在某些情况下,我们获得了我们所谓的“好”反演,而在其他情况下,我们没有。对于外共轭范畴,我们推广了Pedersen的一个定理,得到了一个不动点函子,它是行动的约化交叉积函子的拟逆,我们证明了这是一个很好的逆。对于相互作用,我们证明了部分版本的彼得森定理,使我们能够定义一个不动点函子,但它是否是一个准逆的交叉产品函子的问题仍然是开放的。

英文摘要:

In this partly expository paper we compare three different categories of C*-algebras in which crossed-product duality can be formulated, both for actions and for coactions of locally compact groups. In these categories, the isomorphisms correspond to C*-algebra isomorphisms, imprimitivity bimodules, and outer conjugacies, respectively. In each case, a variation of the fixed-point functor that arises from classical Landstad duality is used to obtain a quasi-inverse for a crossed-product functor. To compare the various cases, we describe in a formal way our view of the fixed-point functor as an "inversion" of the process of forming a crossed product. In some cases, we obtain what we call "good" inversions, while in others we do not. For the outer-conjugacy categories, we generalize a theorem of Pedersen to obtain a fixed-point functor that is quasi-inverse to the reduced-crossed-product functor for actions, and we show that this gives a good inversion. For coactions, we prove a partial version of Pedersen's theorem that allows us to define a fixed-point functor, but the question of whether it is a quasi-inverse for the crossed-product functor remains open.

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。

↑