Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bouncing Branes   Two classical scalar fields are minimally coupled to gravity in the
Kachru-Shulz-Silverstein scenario with a rolling fifth radius. A Tolman
wormhole solution is found for a R x S^3 brane with Lorentz metric and for a R
x AdS_3 brane with positive definite metric.

13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat