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Published online by Cambridge University Press: 21 February 2019
We introduce the notion of factorizable quasi-Hopf algebra by using a categorical point of view. We show that the quantum double D(H) of any finite-dimensional quasi-Hopf algebra H is factorizable, and we characterize D(H) when H itself is factorizable. Finally, we prove that any finite-dimensional factorizable quasi-Hopf algebra is unimodular. In particular, we obtain that the quantum double D(H) is a unimodular quasi-Hopf algebra.
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