Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane World in a Topological Black Holes in Asymptotically Flat
  Spacetime   We study static brane configurations in the bulk background of the
topological black holes in asymptotically flat spacetime. We find that such
configurations are possible even for flat black hole horizon, unlike the AdS
black hole case. We construct the brane world model with an orbifold structure
S^1/Z_2 in such bulk background. We also study massless bulk scalar field.

1
The categories of this paper are: cs
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an