Crane and Frenkel proposed a state sum invariant for triangulated 4-manifolds. They sketched the definition of a Hopf category that was to be used in their construction. Crane and Yetter studied Hopf categories and gave some examples using group cocycles that are associated to the Drinfeld double of
Topological anti-topological fusion in four-dimensional superconformal field theories
โ Scribed by Kyriakos Papadodimas
- Publisher
- Springer-Verlag
- Year
- 2010
- Tongue
- English
- Weight
- 573 KB
- Volume
- 2010
- Category
- Article
- ISSN
- 1126-6708
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