Matrix: Newman/astro-ph

Description: collaboration network, preprints in astrophysics archive,

Newman/astro-ph graph
(undirected graph drawing)

scc of Newman/astro-ph

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  • download as a MATLAB mat-file, file size: 831 KB. Use UFget(2391) or UFget('Newman/astro-ph') in MATLAB.
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    Matrix properties
    number of rows16,706
    number of columns16,706
    # strongly connected comp.1,029
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    Cholesky candidate?no
    positive definite?no

    authorM. Newman
    editorM. Newman
    kindundirected weighted graph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 16706-by-32


    Network collection from M. Newman                                                                  
    The graph astro-ph contains the collaboration network of scientists       
    posting preprints on the astrophysics archive at, 1995-1999,
    as compiled by M. Newman.  The network is weighted, with weights assigned 
    as described in the original papers.  Please cite, as appropriate, one or 
    more of:                                                                  
      M. E. J. Newman, The structure of scientific collaboration networks,    
      Proc. Natl. Acad. Sci. USA 98, 404-409 (2001).                          
      M. E. J. Newman, Scientific collaboration networks: I. Network          
      construction and fundamental results, Phys. Rev. E 64, 016131 (2001).   
      M. E. J. Newman, Scientific collaboration networks: II. Shortest paths, 
      weighted networks, and centrality, Phys. Rev. E 64, 016132 (2001).      

    SVD-based statistics:
    null space dimension1,038
    full numerical rank?no
    singular value gap5.65862e+06

    singular values (MAT file):click here
    SVD method used:s = svd (full (A)) ;

    Newman/astro-ph svd

    For a description of the statistics displayed above, click here.

    Maintained by Tim Davis, last updated 12-Mar-2014.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.