Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polarization of spin-1 particles without an anomalous magnetic moment in
  a uniform magnetic field   The polarization operator projections onto four directions remain unchanged
for spin-1 particles without an anomalous magnetic moment in a uniform magnetic
field. The approximate conservation of the polarization operator projections
onto the horizontal axes of the cylindrical coordinate system takes place.

29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
3
The categories of this paper are: physics