We prove the quasi-Hopf algebra version of the Nichols-Zoeller theorem: A finite dimensional quasi-Hopf algebra is free over any quasi-Hopf subalgebra.
CITATION STYLE
Schauenburg, P. (2003). A quasi-Hopf algebra freeness theorem. Proceedings of the American Mathematical Society, 132(4), 965–972. https://doi.org/10.1090/s0002-9939-03-07181-8
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