Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Contact geometry in the restricted three-body problem   A survey based on lecture notes for an online mini-course taught for
postgraduate students at UDELAR, Montevideo, Uruguay, in November 2020,
remotely from the Mittag-Leffler Institute in Djursholm, Sweden. Lectures were
recorded and are available on YouTube on the author's personal channel ($\sim$
8hs of material in three lectures).

6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org