Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boundary behaviour of Hurwitz schemes   Actions of finite groups on stable curves are studied. They appear naturally
at the boundary of a moduli space of smooth curves with group actions. Those
actions which can equivariantly smoothed are characterised. A description of
topological types of those actions in terms of the quotient curve and mappings
from a kind of fundamental group to the given finite group is given, analogous
to the well known case of actions on smooth curves.

16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con