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arXiv 1005.2764math.ATmath.KT
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SU的基环群的等变K-理论的模结构(2)

The module structure of the equivariant K-theory of the based loop group of SU(2)

Megumi Harada, Lisa C. Jeffrey, Paul Selick

摘要:

设$G=SU(2)$和$ΩG$表示SU(2)中的基环空间。我们明确计算的$R(G)$ -模块结构的拓扑等变$K$ -理论$K_G^*(ΩG)$,特别是表明,它是一个直积的副本$K^*_G(\pt) \cong R(G)$。(We打算在即将发表的配套论文中详细描述$K^*_G(ΩG)$的$R(G)$ -代数(即乘积)结构。)我们的证明使用的几何方法分析闭路空间介绍了普雷斯利和西格尔(并进一步发展米切尔)。然而,Pressley和Segal没有明确计算等变$K$ -理论,我们还需要进一步分析所涉及的空间,因为我们的工作在等变设置。考虑到这一点,我们利用这个机会扩大了普雷斯利-西格尔的原始论述,希望这样做,我们的结果和他们的结果将被更广泛的受众所接受。

英文摘要:

Let $G=SU(2)$ and let $ΩG$ denote the space of based loops in SU(2). We explicitly compute the $R(G)$-module structure of the topological equivariant $K$-theory $K_G^*(ΩG)$ and in particular show that it is a direct product of copies of $K^*_G(\pt) \cong R(G)$. (We intend to describe in detail the $R(G)$-algebra (i.e. product) structure of $K^*_G(ΩG)$ in a forthcoming companion paper.) Our proof uses the geometric methods for analyzing loop spaces introduced by Pressley and Segal (and further developed by Mitchell). However, Pressley and Segal do not explicitly compute equivariant $K$-theory and we also need further analysis of the spaces involved since we work in the equivariant setting. With this in mind, we have taken this opportunity to expand on the original exposition of Pressley-Segal in the hope that in doing so, both our results and theirs would be made accessible to a wider audience.

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