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Nov 29, 2015 at 13:47 history edited David White CC BY-SA 3.0
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May 9, 2012 at 9:12 vote accept Nicolas Boerger
May 8, 2012 at 16:29 answer added Ulrich Pennig timeline score: 7
May 8, 2012 at 7:22 vote accept Nicolas Boerger
May 9, 2012 at 9:12
May 7, 2012 at 23:46 answer added Dmitri Pavlov timeline score: 5
May 7, 2012 at 18:16 comment added Neil Strickland See also mathoverflow.net/questions/44045
May 7, 2012 at 9:49 comment added David Corfield John Baez was wondering about a geometric model for it in Week 149 - math.ucr.edu/home/baez/week149.html - but I don't think ever found one. He discusses its role in classifying principal U(1) 2-bundles here - math.ucr.edu/home/baez/calgary/calgary.pdf.
May 7, 2012 at 8:25 history asked Nicolas Boerger CC BY-SA 3.0