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- W2953311419 abstract "A finite tensor category is called pointed if all its simple objects are invertible. We find necessary and sufficient conditions for two pointed semisimple categories to be dual to each other with respect to a module category. Whenever the dual of a pointed semisimple category with respect to a module category is pointed, we give explicit formulas for the Grothendieck ring and for the associator of the dual. This leads to the definition of categorical Morita equivalence on the set of all finite groups and on the set of all pairs (G, w), where G is a finite group and w is a 3-cocycle on G. A group-theoretical and cohomological interpretation of this relation is given. A series of concrete examples of pairs of groups that are categorically Morita equivalent but have non-isomorphic Grothendieck rings are given. In particular, the representation categories of the Drinfeld doubles of the groups in each example are equivalent as braided tensor categories and hence these groups define the same modular data." @default.
- W2953311419 created "2019-06-27" @default.
- W2953311419 creator A5053112296 @default.
- W2953311419 date "2006-05-18" @default.
- W2953311419 modified "2023-10-18" @default.
- W2953311419 title "Categorical Morita equivalence for group-theoretical categories" @default.
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- W2953311419 hasPublicationYear "2006" @default.
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