Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metric fluctuations and its evolution during inflation   W discuss the evolution of the fluctuations in a symmetric
$\phi_c$-exponential potential which provides a power-law expansion during
inflation using both, the gauge invariant field $\Phi$ and the Sasaki-Mukhanov
field.

13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an