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arXiv · 1207.3611

Z/2Z-extensions of Hopf algebra module categories by their base categories

Alexei Davydov·Ingo Runkel
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Abstract

Starting with a self-dual Hopf algebra H in a braided monoidal category S we construct a Z/2Z-graded monoidal category C = C_0 + C_1. The degree zero component is the category Rep_S(H) of representations of H and the degree one component is the category S. The extra structure on H needed to define the associativity isomorphisms is a choice of self-duality map and cointegral, subject to certain conditions. We also describe rigid, braided and ribbon structures on C in Hopf algebraic terms. Our construction permits a uniform treatment of Tambara-Yamagami categories and categories related to symplectic fermions in conformal field theory.

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Alexei Davydov, Ingo Runkel. 2013-08-22. Z/2Z-extensions of Hopf algebra module categories by their base categories. https://arxiv.org/abs/1207.3611

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