Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Logarithmic operators in the SL(2,R) WZNW model   We find some exact solutions of the Knizhnik-Zamolodchikov equation for the
four point correlation functions that occur in the SL(2,R) WZNW model. They
exhibit logarithmic behaviour in both the Kac-Moody and Virasoro parts. We
discuss their implication for the operator product expansion. We also observe
the appearance of several symmetries of the correlation functions.

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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: physics
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: funct-an