Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Unoriented WZW Models and Holonomy of Bundle Gerbes   The Wess-Zumino term in two-dimensional conformal field theory is best
understood as a surface holonomy of a bundle gerbe. We define additional
structure for a bundle gerbe that allows to extend the notion of surface
holonomy to unoriented surfaces. This provides a candidate for the Wess-Zumino
term for WZW models on unoriented surfaces. Our ansatz reproduces some results
known from the algebraic approach to WZW models.

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The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga