PRELIMINARIES ON TQFTs Introduction Quantizaiton Functors Fusion Algebras THE INVARIANT The Construction Invariance von NEUMANN ALGEGRAS Preliminaries on II1 Factors Bases and M-Valued Inner Products Contragredients and Tensor Products Frobenius Reciprocity TQFTs from Subfactors THE GROUP EXAMPLE The TQFT The Quantum Double APPENDIX Some Topological Preliminaries Simplicial Complexes
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