For each n, six group-theoretical categories built from C_2^{2n} ⋊ S_3 and six 3-cocycles realize all six unitary noncommutative near-group fusion categories.
Frobenius-Schur indicators for near-group and Haagerup-Izumi fusion categories
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abstract
Ng and Schauenburg generalized higher Frobenius-Schur indicators to pivotal fusion categories and showed that these indicators may be computed utilizing the modular data of the Drinfel'd center of the given category. We consider two classes of fusion categories generated by a single non-invertible simple object: near groups, those fusion categories with one non-invertible simple object, and Haagerup-Izumi categories, those with one non-invertible simple object for every invertible object. Examples of both types arise as representations of finite or quantum groups or as Jones standard invariants of finite-depth Murray-von Neumann subfactors. We utilize the Evans-Gannon computation of the tube algebras to obtain formulae for the Frobenius-Schur indicators of objects in both of these families.
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math.CT 1years
2019 1verdicts
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Algebraic realization of noncommutative near-group fusion categories
For each n, six group-theoretical categories built from C_2^{2n} ⋊ S_3 and six 3-cocycles realize all six unitary noncommutative near-group fusion categories.