Fusion algebra at a rational level and cohomology of nilpotent subalgebras ofwidehat{mathfrak{s}mathfrak{l}}(2) |
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| Authors: | Boris Feigin Feodor Malikov |
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| Affiliation: | (1) Landau Institute for Theoretical Physics, Moscow, Russia;(2) Department of Mathematics, Yale University, 06520 New Haven, CT, USA |
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| Abstract: | We define and calculate the fusion algebra of a WZW model at a rational level using cohomological methods. As a byproduct, we obtain a cohomological characterization of admissible representations of 2. |
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| Keywords: | 17B56 17B67 17B81 81T40 |
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