Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Energy-momentum tensors in gauge theory   In field theory on a fibre bundle Y->X, an energy-momentum current is
associated to a lift onto Y of a vector field on X. Such a lift by no means is
unique, and contains a vertical part. It follows that: (i) there are a set of
different energy-momentum currents, (ii) the Noether part of an energy-momentum
current can not be taken away, (iii) if a Lagrangian is not gauge-invariant,
the energy-momentum fails to be conserved.

3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg