Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of many-electron atom polarization in electron-hole formalism   The method has been developed to calculate effects of polarization not only
for a atomic core in a field of valent electron, but also polarization of atom
as a whole in the electron-hole formalism. A secondary quantized density matrix
for many-electron system was used to find the Green function of a quasiparticle
and its effective mass due to many-particle effects.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th