中文

变换群上 2-上闭链的 $K$-理论与同伦

算子代数 2014-09-09 v3 K理论与同调

摘要

本文是作者研究纲领的第一步,旨在探讨局部紧 Hausdorff 群胚 G\mathcal{G} 上的 2-上闭链同伦 ω={ωt}t[0,1]\omega = \{\omega_t\}_{t \in [0,1]} 何时能诱导约化扭曲群胚 CC^*-代数的 KK-理论群之间的同构:K(Cr(G,ω0))K(Cr(G,ω1))K_*(C^*_r(\mathcal{G}, \omega_0)) \cong K_*(C^*_r(\mathcal{G}, \omega_1))。我们推广了 Echterhoff、L"uck、Phillips 和 Walters 于 2010 年的工作,证明了若 G=GX\mathcal{G} = G \ltimes X 是一个第二可数的局部紧变换群,则只要 GG 满足带系数的 Baum-Connes 猜想,GXG \ltimes X 上的 2-上闭链同伦 ω={ωt}t[0,1]\omega = \{\omega_t\}_{t \in [0,1]} 就能产生一个同构 K(Cr(GX,ω0))K(Cr(GX,ω1))K_*(C^*_r(G \ltimes X, \omega_0)) \cong K_*(C^*_r(G \ltimes X, \omega_1))

关键词

引用

@article{arxiv.1402.3280,
  title  = {$K$-theory and homotopies of 2-cocycles on transformation groups},
  author = {Elizabeth Gillaspy},
  journal= {arXiv preprint arXiv:1402.3280},
  year   = {2014}
}

备注

Some improvements to the exposition; also, the hypotheses on Theorem 5.1 have been relaxed so that X is no longer required to be compact. This version (v3) fixes the erroneous argument in v2 for this strengthening of Theorem 5.1. This is the version that will appear in the Journal of Operator Theory