Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Four Equivalent Versions of Non-Abelian Gerbes   We recall and partially improve four versions of smooth, non-abelian gerbes:
Cech cocycles, classifying maps, bundle gerbes, and principal 2-bundles. We
prove that all these four versions are equivalent, and so establish new
relations between interesting recent developments. Prominent partial results we
prove are a bijection between continuous and smooth non-abelian cohomology, and
an explicit equivalence between bundle gerbes and principal 2-bundles as
2-stacks.

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The categories of this paper are: stat
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The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-alg
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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: chao-dyn
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: cond-mat