Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Action-angle variables for geodesic motions in Sasaki-Einstein spaces
  $Y^{p,q}$   We use the action-angle variables to describe the geodesic motions in the
$5$-dimensional Sasaki-Einstein spaces $Y^{p,q}$. This formulation allows us to
study thoroughly the complete integrability of the system. We find that the
Hamiltonian involves a reduced number of action variables. Therefore one of the
fundamental frequency is zero indicating a chaotic behavior when the system is
perturbed.

18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: bayes-an
15
The categories of this paper are: nucl-ex