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Hopf algebras and congruence subgroups
We prove that the kernel of the natural action of the modular group on the center of the Drinfel'd double of a semisimple Hopf algebra is a congruence subgroup. To do this, we introduce a class of generalized Frobenius-Schur indicators and endow it with an action of the modular group that is co...
| Autores principales: | , |
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| Lenguaje: | eng |
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American Mathematical Society
2007
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| Acceso en línea: | https://dx.doi.org/10.1090/S0065-9266-2012-00649-6 http://cds.cern.ch/record/1060655 |