Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symmetric energy-momentum tensor in Maxwell, Yang-Mills, and Proca
  theories obtained using only Noether's theorem   The symmetric and gauge-invariant energy-momentum tensors for source-free
Maxwell and Yang-Mills theories are obtained by means of translations in
spacetime via a systematic implementation of Noether's theorem. For the
source-free neutral Proca field, the same procedure yields also the symmetric
energy-momentum tensor. In all cases, the key point to get the right
expressions for the energy-momentum tensors is the appropriate handling of
their equations of motion and the Bianchi identities. It must be stressed that
these results are obtained without using Belinfante's symmetrization techniques
which are usually employed to this end.

31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph