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Finitely semisimple spherical categories and modular categories are self-dual

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Published Article
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DOI: 10.1016/j.aim.2009.03.002
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arXiv
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Abstract

We show that every essentially small finitely semisimple k-linear additive spherical category in which k=End(1) is a field, is equivalent to its dual over the long canonical forgetful functor. This includes the special case of modular categories. In order to prove this result, we show that the universal coend of the spherical category with respect to the long forgetful functor is self-dual as a Weak Hopf Algebra.

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