Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparing series of rankings with ties by using complex networks: An
  analysis of the spanish stock market (IBEX-35 index)   In this paper we extend the concept of Competitivity Graph to compare series
of rankings with ties ({\em partial rankings}). We extend the usual method used
to compute Kendall's coefficient for two partial rankings to the concept of
evolutive Kendall's coefficient for a series of partial rankings. The
theoretical framework consists of a four-layer multiplex network. Regarding the
treatment of ties, our approach allows to define a tie between two values when
they are close {\em enough}, depending on a threshold. We show an application
using data from the Spanish Stock Market; we analyse the series of rankings
defined by $25$ companies that have contributed to the IBEX-35 return and
volatility values over the period 2003 to 2013.

20
The categories of this paper are: acc-phys
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
2
The categories of this paper are: math
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom