Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmology of Nonlinear Oscillations   The nonlinear oscillations of a scalar field are shown to have cosmological
equations of state with $w = p / \rho$ ranging from $-1 < w < 1$. We
investigate the possibility that the dark energy is due to such oscillations.

21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga