Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Area preserving group actions on surfaces   Suppose G is an almost simple group containing a subgroup isomorphic to the
three-dimensional integer Heisenberg group. For example any finite index
subgroup of SL(3,Z) is such a group. The main result of this paper is that
every action of G on a closed oriented surface by area preserving
diffeomorphisms factors through a finite group.

22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin