Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmological Strucure Formation with Topological Defects   Structure formation with topological defects is described. The main
differences from inflationary models are highlighted. The results are compared
with recent observations. It is concluded that all the defect models studied so
far are in disagreement with recent observations of CMB anisotropies.
Furthermore, present observations do not support 'decoherence', a generic
feature of structure formation from topological defects.

17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin