Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: k-Gerbes, Line Bundles and Anomalies   We use sets of trivial line bundles for the realization of gerbes. For
1-gerbes the structure arises naturally for the Weyl fermion vacuum bundle at a
fixed time. The Schwinger term is an obstruction in the triviality of a
1-gerbe.

9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
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The categories of this paper are: stat
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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: adap-org
14
The categories of this paper are: math-ph
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The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: comp-gas