Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Domain walls and strings formation in the early Universe   Solitons formation through classical dynamics of two scalar fields with the
potential having a saddle point and one minimum in (2+1)-space-time is
discussed. We show that under certain conditions in the early Universe both
domain walls and strings can be formed even if scalar fields are inflaton ones.

25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph