Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The world is not enough   We show that the 5-dimensional model introduced by Randall and Sundrum is
(half of) a wormhole, and that this is a general result in models of the RS
type. We also discuss the gravitational trapping of a scalar particle in 5-d
spacetimes. Finally, we present a simple model of brane-world cosmology in
which the background is a static anti-de Sitter manifold, and the location of
the two 3-branes is determined by the technique of ``surgical grafting''.

21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
23
The categories of this paper are: solv-int