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Aug 29, 2023 at 6:30 comment added David Roberts Note, however, the mistaken claims by Atiyah and Segal about the compact-open and the strong operator topologies on $PU(H)$ being distinct, and that $PU(H)$ is not a topological group in the compact-open topology. See eg ncatlab.org/nlab/show/U%28%E2%84%8B%29 and ncatlab.org/nlab/show/PU%28%E2%84%8B%29
Oct 29, 2010 at 10:11 comment added David Roberts The first one...
Oct 29, 2010 at 6:58 comment added Andrew Stacey Atiyah and Segal's paper on Twisted K-theory is where I would start reading about this.
Oct 29, 2010 at 6:28 comment added Romeo Very nice. Is there a place you recommend for an exposition on this?
Oct 29, 2010 at 5:38 comment added David Roberts Argh, was too slow in my comment to the question.
Oct 29, 2010 at 5:26 history answered Dai Tamaki CC BY-SA 2.5