Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Complex network study of Brazilian soccer players   Although being a very popular sport in many countries, soccer has not
received much attention from the scientific community. In this paper, we study
soccer from a complex network point of view. First, we consider a bipartite
network with two kinds of vertices or nodes: the soccer players and the clubs.
Real data were gathered from the 32 editions of the Brazilian soccer
championship, in a total of $13,411$ soccer players and 127 clubs. We find a
lot of interesting and perhaps unsuspected results. The probability that a
Brazilian soccer player has worked at $N$ clubs or played $M$ games shows an
exponential decay while the probability that he has scored $G$ goals is power
law. Now, if two soccer players who have worked at the same club at the same
time are connected by an edge, then a new type of network arises (composed
exclusively by soccer players nodes). Our analysis shows that for this network
the degree distribution decays exponentially. We determine the exact values of
the clustering coefficient, the assortativity coefficient and the average
shortest path length and compare them with those of the Erd\"os-R\'enyi and
configuration model. The time evolution of these quantities are calculated and
the corresponding results discussed.

36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
19
The categories of this paper are: eess
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin