Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure dynamics of evolving scientific networks   Co-authorship networks have been extensively studied in network science as
they pose as a perfect example of how single elements of a system give rise to
collective phenomena on an intricate, non-trivial structure of interactions.
However, co-authorship networks are, in fact, one-mode projections of original
bipartite networks, which we call here scientific networks, where authors are
agents connected to artifacts - the papers they have published. Nonetheless,
few studies take into account the structure of the original bipartite network
to understand and explain the topological properties of the projected network.
Here, we create bipartite networks using extensive datasets from the American
Physical Society (APS) dating back to 1893 up to 2015 inclusive, and from arXiv
(1986-2015). We look at the time evolution of publications and at the dynamic
structure of scientific networks considering four major features of bipartite
networks, namely degree distributions, density, redundancy and cycles. We show
how such features shape the formation of co-authorship networks and their
observed structural properties. While the structure of the networks of most
disciplines does not show significant changes over time, the appearance of
large collaborations, in physics, generate largely skewed degree distributions
of top nodes. The latter, in turn, induces massive cliques in the projection,
triggering considerable densification of the co-authorship network, while the
density of the original bipartite network remains at the same levels.

19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph