Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integral representation of the RPA correlation energy   Using the spectral function F'(z)/F(z) the RPA correlation energy and other
properties of a finite system can be written as a contour integral in a compact
way. This yields a transparent expression and reduces drastically the numerical
efforts for obtaining reliable values. The method applied to pairing vibrations
in rotating nuclei as an illustrative example.

29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio