Integral modular categories of Frobenius-Perron dimension pqnpq^n

preprint2015arXivOpen access

Abstract

Integral modular categories of Frobenius-Perron dimension pqnpq^n, where pp and qq are primes, are considered. It is already known that such categories are group-theoretical in the cases of 0≤n≤40 \leq n \leq 4. In the general case we determine that these categories are either group theoretical or contain a Tannakian subcategory of dimension qiq^i for i>1i>1. We then show that all integral modular categories C\mathcal{C} with FPdim(C)=pq5\mathrm{FPdim}(\mathcal{C})=pq^5 are group-theoretical, and, if in addition p<qp<q, all with FPdim(C)=pq6\mathrm{FPdim}(\mathcal{C})=pq^6 or pq7pq^7 are group-theoretical. In the process we generalize an existing criterion for an integral modular category to be group-theoretical.

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