Quasisymmetric and unipotent tensor categories

Details Quasisymmetric and unipotent tensor categories Quasisymmetric and unipotent tensor categories

2007-08-10

arxiv.org/abs/0708.1487v2

Mathematics

Quantum Algebra

8 pages, latex

Scientific paper

We classify braided tensor categories over C of exponential growth which are quasisymmetric, i.e., the squared braiding is the identity on the product of any two simple objects. This generalizes the classification results of Deligne on symmetric categories of exponential growth, and of Drinfeld on quasitriangular quasi-Hopf algebras. In particular, we classify braided categories of exponential growth which are unipotent, i.e., those whose only simple object is the unit object. We also classify fiber functors on such categories. Finally, using the Etingof-Kazhdan quantization theory of Poisson algebraic groups, we give a classification of coconnected Hopf algebras, i.e. of unipotent categories of exponential growth with a fiber functor.

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