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Jun 14, 2023 at 8:20 comment added Ulrich Pennig @AksharaPrasad Any projection in a $C^*$-algebra is bounded by 1, right? (since 1-p for a projection p is again a projection).
Jun 13, 2023 at 17:13 comment added Panini For the infinite Cuntz algebra, every truncated sum of range projections has to be bounded by 1. So there IS a condition about the sum.
Dec 21, 2017 at 13:25 answer added hänsel timeline score: 1
Jul 28, 2013 at 20:04 answer added André Henriques timeline score: 3
Aug 31, 2012 at 6:55 vote accept Ulrich Pennig
Aug 30, 2012 at 13:01 history edited Ulrich Pennig CC BY-SA 3.0
added question about states
Aug 30, 2012 at 11:55 answer added Mikael de la Salle timeline score: 21
Aug 30, 2012 at 11:53 answer added Ollie timeline score: 4
Aug 30, 2012 at 10:07 history asked Ulrich Pennig CC BY-SA 3.0