## Intertwining operator algebras and vertex tensor categories for affine Lie algebras.(English)Zbl 0953.17016

The authors prove the associativity of intertwining operators for the vertex operator algebras associated to affine Lie algebras at positive level. This can be viewed as an application of the authors’ earlier series of works on the general tensor product theory for representations of vertex operator algebras. In particular, they obtain the braided tensor category structures on the category generated by the standard modules of affine Lie algebras at positive integral level.

### MSC:

 17B69 Vertex operators; vertex operator algebras and related structures
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### References:

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