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Dec 6, 2017 at 14:12 answer added far timeline score: 1
Jan 26, 2012 at 22:42 history edited Johannes Ebert
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Jan 26, 2012 at 22:15 comment added Johannes Ebert You picked a strange tag - "functinoal-analysis" -:)) Some weeks ago, I asked myself the same question, especially since Blackadar ''leaves'' this ''to the reader'' in his K-theory book, 2nd edition, bottom of page 165. Searching his references does not yield any result.
Jan 26, 2012 at 21:51 comment added Alain Valette Hmmm... knowing that you are at PSU, you have the best possible experts at hand... I think you can safely re-tag the question as "open problem"!
Jan 26, 2012 at 20:22 history asked Paul Siegel CC BY-SA 3.0