Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electronic shell structure of large metallic clusters in the modified
  harmonic oscillator   Shell structure in the single particle spectrum of deformed harmonic
oscillator potentials when a term proportional to $(\vec L)^2$ is added is
analyzed for a large particle number. A scaling law which gives a dividing line
between regular and chaotic behavior in terms of energy, deformation and
strength of the $(\vec L)^2$ term has been found. According to this law, shell
structure survives for higher particle numbers only with lesser deformation.

31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an