Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Singularities on the brane aren't isotropic   Recent studies of homogeneous anisotropic universe models in the brane world
scenario show that the cosmological singularity in this context is isotropic.
It has therefore been suggested that this may be a generic feature of
singularities on the brane, even in the inhomogeneous case. Using a
perturbative approach, we show that this is not the case. As in the GR case,
the presence of decaying modes in the perturbations signal the instability (in
the past) of the isotropic singularity. The brane universe is therefore not
born with isotropy built in: as in standard cosmology, the observed large-scale
isotropy and homogeneity remains to be explained.

26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin