Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Interpretation of the Wigner Energy as due to RPA Correlations   In a schematic model with equidistant fourfold degenerate single-nucleon
levels, a conventional isovector pairing force and a symmetry force, the RPA
correlation energy rises almost linearly with the isospin T, thus producing a
Wigner term in accordance with the empirical proportionality of the symmetry
energy to T(T+1).

32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin