Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Vladimir Ivanovich Smirnov (1887-1974)   The year 2017 marked the 130th anniversary of the prominent Russian
mathematician Vladimir Ivanovich Smirnov. We review some aspects of his life
and his mathematical accomplishments.

24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph