• UF Sparse Matrix Collection
  • Matrix group: Barabasi
  • Click here for a description of the Barabasi group.
  • Click here for a list of all matrices
  • Click here for a list of all matrix groups

  • Matrix: Barabasi/NotreDame_www
  • Description: CCNR network: Barabasi's web page network of nd.edu
  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1510) or UFget('Barabasi/NotreDame_www') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Barabasi/NotreDame_www

    scc of Barabasi/NotreDame_www

    Barabasi/NotreDame_www graph

    Matrix properties
    number of rows325,729
    number of columns325,729
    nonzeros929,849
    structural full rank?no
    structural rank102,992
    # of blocks from dmperm16,181
    # strongly connected comp.231,666
    explicit zero entries0
    nonzero pattern symmetry 33%
    numeric value symmetry 33%
    typebinary
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorR. Albert, H. Jeong, A. Barabasi
    editorH. Jeong
    date1999
    kinddirected graph
    2D/3D problem?no

    Notes:

    http://www.nd.edu/~networks

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))5,621,584 6,973,304
    Cholesky flop count6.8e+09 8.1e+09
    nnz(L+U), no partial pivoting10,917,439 13,620,879
    nnz(V) for QR, upper bound nnz(L) for LU29,703,118 20,442,539
    nnz(R) for QR, upper bound nnz(U) for LU9,728,338 10,066,436

    Maintained by Tim Davis, last updated 04-May-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.