Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Constraints on the Combined Models with $R^{2-q}$ Inflation and Viable
  $f(R)$ Dark Energy   We investigate the observational constraints on the modified gravity, which
combines the $R^{2-q}$ inflation with the power-law (exponential) type of the
viable $f(R)$ dark energy models. We discuss the difference between the
combined model and $R^{2-q}$ gravity in the inflationary epoch and obtain the
constraints on the deviation power $q$ as well as the parameters in $f(R)$ by
using the CosmoMC package. The allowed ranges of the spectral index and
tensor-to-scalar ratio from the Planck data are highly restricted, resulting in
$q < 2.66 \times 10^{-2}$ and $2.17 \times 10^{-2}$ for the power-law and
exponential types of $f(R)$ gravity, respectively.

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The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph