\myprogram{{multiplexity.py}}
          {compute the pairwise multiplexity between all the pairs of
          layers of a multiplex.}
          {$<$layer1$>$ $<$layer2$>$ [$<$layer3$>$...]}

\mydescription{Compute and print on output the pairwise multiplexity 
 $Q_{\alpha, \beta}$ (i.e., the fraction of nodes active on both
          layers) between all pairs of layers. The layers are given as
          input in the files \textit{layer1}, \textit{layer2}, etc.
  
  Each input file contains the (undirected) edge list of a layer, and
  each line is in the format:
  
  \hspace{0.5cm}\textit{src\_ID} \textit{dest\_ID}
  
  where \textit{src\_ID} and \textit{dest\_ID} are the IDs of the two
  endpoints of an edge.}

\myreturn{The program prints on \texttt{stdout} a list of lines, in
  the format:

  \hspace{0.5cm} \textit{layer1 layer2 mult}

  \noindent where \textit{layer1} and \textit{layer2} are the IDs of
  the layers, and \textit{mult} is the value of the multiplexity
  $Q_{layer1, layer2}$. Layers IDs start from zero, are are associated
  to the layers in the same order in which the layer files are
  provided on the command line.}

\myreference{\refcorrelations}