Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A finite presentation for the mapping class group of a nonorientable
  surface with Dehn twists and one crosscap slide as generators   Let N_{g,s} denote the nonorientable surface of genus g with s boundary
components. Recently Paris and Szepietowski obtained an explicit finite
presentation for the mapping class group M(N_{g,s}) of the surface N_{g,s},
where s\in{0,1} and g+s>3. Following this work we obtain a finite presentation
for the mapping class group M(N_{g,s}) with generators being Dehn twists and
one crosscap slide.

19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio