Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Shape/Phase Transitions and Critical Point Symmetries in Atomic Nuclei   Shape/phase transitions in atomic nuclei have first been discovered in the
framework of the Interacting Boson Approximation (IBA) model. Critical point
symmetries appropriate for nuclei at the transition points have been introduced
as special solutions of the Bohr Hamiltonian, stirring the introduction of
additional new solutions describing wide ranges of nuclei. A short review of
these recent developments will be attempted.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc