Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Community Structure and Topical Differentiation in European RTD
  Collaborations   We investigate research and development collaborations under the EU Framework
Programs (FPs) for Research and Technological Development. The collaborations
in the FPs give rise to bipartite networks, with edges existing between
projects and the organizations taking part in them. A version of the modularity
measure, adapted to bipartite networks, is presented. Communities are found so
as to maximize the bipartite modularity. Projects in the resulting communities
are shown to be topically differentiated.

33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
7
The categories of this paper are: hep-th
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph