Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reference system approach within the white-dwarfs theory   Reference system approach of non-relativistic electron fluid theory was
adapted for calculation of characteristics of the electron-nuclear model at the
densities typical of degenerate dwarfs. Two- and three correlation functions of
degenerate relativistic electron gas have been calculated in the
momentum-frequency representation in the local field approximation. Main
contributions of the Coulomb interactions to the energy and equation of state
of the model at $T=0$ K have been calculated in the adiabatic approximation.

27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org