Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Surface properties of nuclear pairing with the Gogny force in a
  simplified model   Surface properties of neutron-neutron (T=1) pairing in semi-infinite nuclear
matter in a hard wall potential are investigated in BCS approximation using the
Gogny force. Surface enhancement of the gap function, pairing tensor and
correlation energy density is put into evidence.

8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci