Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonsingular Dilaton Cosmology   We study spatially homogeneous and isotropic solutions to the equations of
motion derived from dilaton gravity, in the presence of a special combination
of higher derivative terms in the gravitational action. All solutions are
nonsingular. For initial conditions resembling those in the pre-big-bang
scenario, there are solutions corresponding to a spatially flat, bouncing
Universe originating in a dilaton-dominated contracting phase and emerging as
an expanding Friedmann Universe.

11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
29
The categories of this paper are: funct-an
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom