Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lie Groupoids in Classical Field Theory II: Gauge Theories, Minimal
  Coupling and Utiyama's Theorem   In the two papers of this series, we initiate the development of a new
approach to implementing the concept of symmetry in classical field theory,
based on replacing Lie groups/algebras by Lie groupoids/algebroids, which are
the appropriate mathematical tools to describe local symmetries when gauge
transformations are combined with space-time transformations. In this second
part, we shall adapt the formalism developed in the first paper to the context
of gauge theories and deal with minimal coupling and Utiyama's theorem.

32
The categories of this paper are: atom-ph
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The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: hep-lat
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The categories of this paper are: funct-an
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex