Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Note on T-Duality, Open Strings in B-field Background and Canonical
  Transformations   In this paper we study T-duality for open strings ending on branes with
non-zero B-field on them from the point of view of canonical transformations.
For the particular case of type II strings on the two torus we show that the
$Sl(2,Z)_N$ transformations can be understood as a sub-class of canonical
transformations on the open strings in the B-field background.

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The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
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The categories of this paper are: dg-ga
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The categories of this paper are: mtrl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin