Operator amenability of the Fourier algebra in the cb-multiplier norm
Functional Analysis
2007-10-12 v3 Operator Algebras
Abstract
Let be a locally compact group, and let denote the closure of , the Fourier algebra of , in the space of completely bounded multipliers of . If is a weakly amenable, discrete group such that is residually finite-dimensional, we show that is operator amenable. In particular, is operator amenable even though , the free group in two generators, is not an amenable group. Moreover, we show that, if is a discrete group such that is operator amenable, a closed ideal of is weakly completely complemented in if and only if it has an approximate identity bounded in the cb-multiplier norm.
Keywords
Cite
@article{arxiv.math/0501092,
title = {Operator amenability of the Fourier algebra in the cb-multiplier norm},
author = {Brian E. Forrest and Volker Runde and Nico Spronk},
journal= {arXiv preprint arXiv:math/0501092},
year = {2007}
}
Comments
LaTeX2e; 18 pages; cleaned up a bit