Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A scientometric study of General Relativity and Quantum Cosmology from
  2000 to 2012   2015 is the centennial of Einstein General Relativity. On this occasion, we
examine the General Relativity and Quantum Cosmology (GRQC) field of research
by analysing 38291 papers uploaded on the electronic archives arXiv.org from
2000 to 2012. We establish a map of the countries contributing to GRQC in 2012.
We determine the main journals publishing GRQC papers and which countries
publish in which journals. We find that more and more papers are written by
groups (instead of single) of authors with more and more international
collaborations. There are huge differences between countries. Hence Russia is
the country where most of papers are written by single authors whereas Canada
is one of the countries where the most of papers imply international
collaborations. We also study authors mobility, determining how some groups of
authors spread worldwide with time in different countries. The largest
mobilities are between USA-UK and USA-Germany. Countries attracting the most of
GRQC authors are Netherlands and Canada whereas those undergoing a brain drain
are Italy and India. There are few mobility between Europe and Asia contrarily
to mobility between USA and Asia.

28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int