Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1992-02-14
Commun.Math.Phys. 150 (1992) 83-108
Physics
High Energy Physics
High Energy Physics - Theory
30 pages
Scientific paper
10.1007/BF02096567
We show how to construct, starting from a quasi-Hopf algebra, or quasi-quantum group, invariants of knots and links. In some cases, these invariants give rise to invariants of the three-manifolds obtained by surgery along these links. This happens for a finite-dimensional quasi-quantum group, whose definition involves a finite group $G$, and a 3-cocycle $\om$, which was first studied by Dijkgraaf, Pasquier and Roche. We treat this example in more detail, and argue that in this case the invariants agree with the partition function of the topological field theory of Dijkgraaf and Witten depending on the same data $G, \,\om$.
Altschuler Daniel
Coste Antoine
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