Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On dynamics of cylindrical and spherical relativistic domain walls of
  finite thickness   Dynamics of cylindrical and spherical relativistic domain walls is
investigated with the help of a new method based on Taylor expansion of the
scalar field in a vicinity of the core of the wall. Internal oscillatory modes
for the domain walls are found. These modes are non-analytic in the "width" of
the domain wall. Rather non-trivial transformation to a special coordinate
system, widely used in investigations of relativistic domain walls, is studied
in detail.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics