Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On some physical aspects of isotropic cosmology in Riemann-Cartan
  spacetime   Isotropic cosmology built in the framework of the Poincar\'e gauge theory of
gravity based on sufficiently general expression of gravitational Lagrangian is
considered. The derivation of cosmological equations and equations for torsion
functions in the case of the most general homogeneous isotropic models is
given. Physical aspects of isotropic cosmology connected with possible solution
of dark energy problem and problem of cosmological singularity are discussed.

1
The categories of this paper are: cs
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
18
The categories of this paper are: econ