Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A minimal generating set of the level 2 mapping class group of a
  non-orientable surface   We construct a minimal generating set of the level 2 mapping class group of a
nonorientable surface of genus $g$, and determine its abelianization for
$g\ge4$.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc