A descent theorem in topological K-theory
K理论与同调
2007-05-23 v1 算子代数
摘要
Let A be a Banach algebra and A' its complexification. In this paper we show that the homotopy fixed point set of K(A'), the topological K-theory space of A', under complex conjugation is just K(A), the topological K-theory space of A. This result generalizes the well known fact that BO is BU^hZ/2. The proof uses in an essential way Atiyah's KR theory and the Clifford algebra definition of higher K-groups.
引用
@article{arxiv.math/0509396,
title = {A descent theorem in topological K-theory},
author = {Max Karoubi},
journal= {arXiv preprint arXiv:math/0509396},
year = {2007}
}
备注
5 pages ; see also http://www.math.jussieu.fr/~karoubi/