Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solving the heptic in two dimensions: Geometry and dynamics under
  Klein's group of order 168   There is a family of seventh-degree polynomials $H$ whose members possess the
symmetries of a simple group of order 168. This group has an elegant action on
the complex projective plane. Developing some of the action's rich algebraic
and geometric properties rewards us with a special map that also realizes the
168-fold symmetry. The map's dynamics provides the main tool in an algorithm
that solves "heptic" equations in $H$.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
19
The categories of this paper are: eess
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph