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

  • Matrix: Pajek/CSphd
  • Description: Pajek network: PhD's in computer science
  • download as a MATLAB mat-file, file size: 27 KB. Use UFget(1458) or UFget('Pajek/CSphd') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Pajek/CSphd

    scc of Pajek/CSphd

    Pajek/CSphd graph

    Matrix properties
    number of rows1,882
    number of columns1,882
    nonzeros1,740
    structural full rank?no
    structural rank706
    # of blocks from dmperm408
    # strongly connected comp.1,882
    explicit zero entries0
    nonzero pattern symmetry 0%
    numeric value symmetry 0%
    typebinary
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    author
    editorV. Batagelj
    date2006
    kinddirected graph
    2D/3D problem?no

    Additional fieldssize and type
    phdyearfull 1882-by-1
    nodenamefull 1882-by-32

    Notes:

    ------------------------------------------------------------------------------
Pajek network converted to sparse adjacency matrix for inclusion in UF sparse 
matrix collection, Tim Davis.  For Pajek datasets, See V. Batagelj & A. Mrvar,
http://vlado.fmf.uni-lj.si/pub/networks/data/.                                
------------------------------------------------------------------------------

    Ordering statistics:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))3,702 3,885
    Cholesky flop count7.6e+03 8.8e+03
    nnz(L+U), no partial pivoting5,522 5,888
    nnz(V) for QR, upper bound nnz(L) for LU1,907 1,908
    nnz(R) for QR, upper bound nnz(U) for LU6,824 6,824

    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.