Playing this video requires the latest flash player from Adobe.
Download link (right click and 'save-as') for playing in VLC or other f4v compatible player.
Reference: Topological gauge theories and group cohomology Robbert Dijkgraaf and Edward Wittenhttp://projecteuclid.org/DPubS?service=UI&version=1.0&verb=Display&handle=euclid.cmp/1104180750 Braiding statistics approach to symmetry-protected topological phases Michael Levin, Zheng-Cheng Guhttp://arxiv.org/abs/1202.3120
