Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Comment by Palle (astro-ph/0503562) on the vorticity and shear of
  the Universe   We show that a recent comment where Palle criticises works regarding CMBR
fluctuations for a particular type of Bianchi models, is incorrect. In
particular, in contrast to the claims of Palle, we point out that Bianchi
models do allow for vorticity.

3
The categories of this paper are: physics
19
The categories of this paper are: eess
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph