Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $SL(2,R)xSU(2)/R^2$ string model in curved spacetime and exact conformal
  results   Pursuing further the recent methods in the algebraic Hamiltonian approach to
gauged WZW models, we apply them to the bosonic SL(2,R) X SU(2)/R^2 model
recently investigated by Nappi and Witten. We find the global space and compute
the conformally exact metric and dilaton fields to all orders in the $1/k$
expansion. The semiclassical limit $k',k\to \infty$ of our exact results agree
with the lowest order perturbation computation which was done in the Lagrangian
formalism. We also discuss the supersymmetric type-II and heterotic versions of
this model and verify the non-renormalization of $e^\Phi\sqrt{-G}$.

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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: stat
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-lat
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: econ