Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some considerations about reviewing and open-access in scientific
  publishing   Scientific research changed profoundly over the last 30 years, in all its
aspects. Scientific publishing has changed as well, mainly because of the
strong increased number of submitted papers and because of the appearance of
Open Access journals and publishers. We propose some reflections on these
issues.

29
The categories of this paper are: funct-an
2
The categories of this paper are: math
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci