Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the projectivity of the moduli space of stable surfaces in
  characteristic p>5   We prove that every proper subspace of the moduli space of stable surfaces
with fixed volume over an algebraically closed field of characteristic p>5 is
projective. As a consequence we also deduce that the same moduli space is
projective over Z[1/30] modulo two conjectural local properties of the moduli
functor.

37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int