Spaces of sections of Banach algebra bundles

Details Spaces of sections of Banach algebra bundles Spaces of sections of Banach algebra bundles

2011-01-03

arxiv.org/abs/1101.0444v3

Mathematics

Operator Algebras

15 pages. Results generalized to include both real and complex K-theory. To appear in J. K-Theory

Scientific paper

Suppose that $B$ is a $G$-Banach algebra over $\mathbb{F} = \mathbb{R}$ or $\mathbb{C}$, $X$ is a finite dimensional compact metric space, $\zeta : P \to X$ is a standard principal $G$-bundle, and $A_\zeta = \Gamma (X, P \times_G B)$ is the associated algebra of sections. We produce a spectral sequence which converges to $\pi_*(GL_o A_\zeta) $ with [E^2_{-p,q} \cong \check{H}^p(X ; \pi_q(GL_o B)).] A related spectral sequence converging to $\K_{*+1}(A_\zeta)$ (the real or complex topological $K$-theory) allows us to conclude that if $B$ is Bott-stable, (i.e., if $ \pi_*(GL_o B) \to \K_{*+1}(B)$ is an isomorphism for all $*>0$) then so is $A_\zeta$.

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