Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: CMBR dipole from ultra large scale isocurvature perturbations   The observed CMBR dipole, generally interpreted as the consequence of the
peculiar motion of the Sun with respect to the reference frame of the CMBR, can
also be explained by the presence of ultra large scale (of the order of
$100H_0^{-1}$) isocurvature perturbations. Moreover, the simplest model of
inflation with several scalar fields, namely that of double inflation, with
appropriate parameters, can produce such perturbations.

31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat