Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Calculating cohomology groups of moduli spaces of curves via algebraic
  geometry   We compute the first, second, third, and fifth rational cohomology groups of
the moduli space of stable n-pointed genus g curves, for all g and n, using
(mostly) algebro-geometric techniques.

13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int