Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High spin structures in the $A\approx 40$ mass region: from
  superdeformation to extreme deformation and clusterization (an example of
  $^{28}$Si)   The search for extremely deformed structures in the yrast and near-yrast
region of $^{28}$Si has been performed within the cranked relativistic mean
field theory up to spin $I=20\hbar$. The fingerprints of clusterization are
seen (well pronounced) in the superdeformed (hyperdeformed) configurations.

2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc