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A reason for fusion rules to be even | | Juergen Fuchs
; Ingo Runkel
; Christoph Schweigert
; | | Date: |
23 Oct 2001 | | Journal: | J.Phys. A35 (2002) L255-260 | | Subject: | Quantum Algebra; Category Theory | math.QA hep-th math.CT | | Abstract: | We show that certain tensor product multiplicities in semisimple braided sovereign tensor categories must be even. The quantity governing this behavior is the Frobenius-Schur indicator. The result applies in particular to the representation categories of large classes of groups, Lie algebras, Hopf algebras and vertex algebras. | | Source: | arXiv, math.QA/0110257 | | Services: | Forum | Review | PDF | Favorites | |
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