Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact solutions for gravitational collapse with a dilaton field in
  arbitrary dimensions   We present time-dependent analytic solutions to the Einstein equations
coupled with a dilaton (scalar) field. The background geometry for the
solutions is a product of an N-dimensional spherically symmetric space and a
d-dimensional flat space. We discuss the global properties of the spacetime.

11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th