Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Note on T-duality of Strings in Plane-Wave Backgrounds   We show, by direct computations of bosonic string spectra, the O(d,d;Z)
(d=1,2) T-duality in the maximally supersymmetric IIB plane-wave background
compactified on S^1 and T^2. Only half of the ordinary set of zero modes appear
in the Hamiltonian. This "half" Narain lattice is proved to be stabilized by
the T-duality group.

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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: atom-ph
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The categories of this paper are: econ
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph