Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spherically-symmetric gravitational fields in the metric-affine gauge
  theory of gravitation   Geometric structure of spherically-symmetric space-time in metric-affine
gauge theory of gravity is studied. Restrictions on curvature tensor and
Bianchi identities are obtained. By using certain simple gravitational
Lagrangian the solution of gravitational equations for vacuum
spherically-symmetric gravitational field is obtained.

16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th