Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quantum mechanics for a vector particle in the magnetic field on
  4-dimensional sphere   Quantum-mechanical wave equation for a particle with spin 1 is investigated
in presence of external magnetic field in spaces with non-Euclidean geometry
with constant positive curvature. Separation of the variable is performed;
differential equations in the variable r are solved in hypergeometric
functions. T he study o f z-dependence of the wave function has been reduced to
a system of three linked ordinary differential 2-nd order equations; till now
the system in z variable is not solved.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom