ar X iv : 0 90 8 . 10 44 v 1 [ m at h . Q A ] 7 A ug 2 00 9 Modular invariants for group - theoretical modular data
نویسنده
چکیده
We classify indecomposable commutative separable (special Frobenius) algebras and their local modules in (untwisted) group-theoretical modular categories. This gives a description of modular invariants for grouptheoretical modular data. As a bi-product we provide an answer to the question when (and in how many ways) two group-theoretical modular categories are equivalent as ribbon categories.
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