English

Frobenius-Schur indicators for some fusion categories associated to symmetric and alternating groups

Quantum Algebra 2015-03-04 v1 Rings and Algebras

Abstract

We calculate Frobenius-Schur indicator values for some fusion categories obtained from inclusions of finite groups HGH\subset G, where more concretely GG is symmetric or alternating, and HH is a symmetric, alternating or cyclic group. Our work is strongly related to earlier results by Kashina-Mason-Montgomery, Jedwab-Montgomery, and Timmer for bismash product Hopf algebras obtained from exact factorizations of groups. We can generalize some of their results, settle some open questions and offer shorter proofs; this already pertains to the Hopf algebra case, while our results also cover fusion categories not associated to Hopf algebras.

Keywords

Cite

@article{arxiv.1503.01072,
  title  = {Frobenius-Schur indicators for some fusion categories associated to symmetric and alternating groups},
  author = {Peter Schauenburg},
  journal= {arXiv preprint arXiv:1503.01072},
  year   = {2015}
}

Comments

15 pages