Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relations for Four Nucleons in a Single j Shell-using 9j Symbols to get
  rid of 9j Symbols   In a previous work we considered the number of pairs of particles with
angular momentum J12 for systems with angular momentum zero.Here we extend the
work to states of any total angular momentum.We find simplified relations
satisfied for a system of four nucleoons with isospin zero and two.

36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
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The categories of this paper are: supr-con
1
The categories of this paper are: cs
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph