Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Riemann surfaces with a large abelian group of automorphisms   In this paper we classify all Riemann surfaces having a large abelian group
of automorphisms, that is having an abelian group of automorphism of order
strictly bigger then $4(g-1)$, where $g$ denotes as usual the genus of the
Riemann surface.

28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg