Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DM production mechanisms   We review the mechanism of production of dark matter particles in the early
Universe, both in standard and non-standard pre-Big Bang Nucleosynthesis
cosmologies. We concentrate mostly on the production of WIMPs.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th