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Fusion products of twisted modules in permutation orbifolds (1907.00094v2)
Published 28 Jun 2019 in math.QA
Abstract: Let $V$ be a vertex operator algebra, $k$ a positive integer and $\sigma$ a permutation automorphism of the vertex operator algebra $V{\otimes k}$. In this paper, we determine the fusion product of any $V{\otimes k}$-module with any $\sigma$-twisted $V{\otimes k}$-module.
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