Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radial orbit instability: review and perspectives   This paper presents elements about the radial orbit instability, which occurs
in spherical self-gravitating systems with a strong anisotropy in the radial
velocity direction. It contains an overview on the history of radial orbit
instability. We also present the symplectic method we use to explore stability
of equilibrium states, directly related to the dissipation induced instability
mechanism well known in theoretical mechanics and plasma physics.

26
The categories of this paper are: bayes-an
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
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The categories of this paper are: eess
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph