Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Geometric chaoticity leads to ordered spectra for randomly interacting
  fermions   A rotationally invariant random interaction ensemble was realized in a
single-j fermion model. The dominance of ground states with zero and maximum
spin was confirmed and explained with a statistical approach based on the
random coupling of individual angular momenta. The interpretation is supported
by the structure of the ground state wave functions.

22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci