Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singular inflation from Born-Infeld-f(R) gravity   Accelerating dynamics from Born-Infeld-$f(R)$ gravity are studied in a
simplified conformal approach without matter. Explicit unification of inflation
with late-time acceleration is realized within this singular inflation
approach, which is similar to Odintsov-Oikonomou singular $f(R)$ inflation. Our
model turns out to be consistent with the latest release of Planck data.

18
The categories of this paper are: econ
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an