Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A canonical approach to S-duality in Abelian gauge theory   We examine the electric-magnetic duality for a U(1) gauge theory on a general
4-manifold. The partition function for such a theory transforms as a modular
form of specific weight. However, in the canonical approach, we show that
S-duality, like T-duality, is generated by a canonical transformation leading
to a modular invariant partition function.

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The categories of this paper are: physics
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: nucl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: cond-mat