Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CMBR distortion concerned with recombination of the primordial hydrogen
  plasma   CMBR distortion concerned with recombination of the primordial plasma is
calculated in frequency band from 1 GHz to 100 GHz in the frame of the standard
cosmological model for different values of cosmological density parameters:
nonrelativistic matter density $\Omega_m$ and baryonic matter density
$\Omega_b$. Comparison of these results with observational data which will be
obtained from planned experiments may be used for independent determination of
the cosmological parameters $\Omega_m$ and $\Omega_b$.

17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
2
The categories of this paper are: math
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
10
The categories of this paper are: q-bio
14
The categories of this paper are: math-ph