Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The contact geometry of the restricted 3-body problem   We show that the planar circular restricted three body problem is of
restricted contact type for all energies below the first critical value (action
of the first Lagrange point) and for energies slightly above it. This opens up
the possibility of using the technology of Contact Topology to understand this
particular dynamical system.

11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys