Very nice review on 3-cocycles, history and connection to many topics in math and physics:
Representation Theory of Twisted Group Double
D. Altschulera, A. Costeb, J-M. Maillard,
An important paper on Finite group modular data:
Very nice review on 3-cocycles, history and connection to many topics in math and physics:
Representation Theory of Twisted Group Double
D. Altschulera, A. Costeb, J-M. Maillard,
An important paper on Finite group modular data: