Fusion rules and the Patera-Sharp generating-function method
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We review some contributions on fusion rules that were inspired by the work of Sharp, in particular, the generating-function method for tensor-product coefficients that he developed with Patera. We also review the Kac-Walton formula, the concepts of threshold level, fusion elementary couplings, fusion generating functions and fusion bases. We try to keep the presentation elementary and exemplify each concept with the simple $\su(2)_k$ case.
harvmac 15 pages. Contribution to the Proceedings of the Workshop on symmetry in physics in memory of Robert T. Sharp
harvmac 15 pages. Contribution to the Proceedings of the Workshop on symmetry in physics in memory of Robert T. Sharp