Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Solitons and soliton-antisoliton pairs of a Goldstone model in 3+1
  dimensions   We study finite energy static solutions to a global symmetry breaking model
in 3+1 dimensions described by an isovector scalar field. The basic features of
two different types of configurations are discussed, one of them corresponding
to axially symmetric multisolitons with topological charge $n$, and the other
one to unstable soliton-antisoliton pairs with zero topological charge.

6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
17
The categories of this paper are: q-fin