Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Forty years of acting electron-positron colliders   Around forty years passed from the beginning of operation of the first
electron-positron colliding beam facility VEPP-2 in Institute of Nuclear
Physics (INP), Novosibirsk. Here I described development of electron-positron
colliding beam project in INP, as well as advance of similar projects of the
first generation at LAL, Orsay and at LNF, Frascati.

28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
3
The categories of this paper are: physics
1
The categories of this paper are: cs
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The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
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The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph