• 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/Tina_DisCog
  • Description: Pajek network: student govt, Univ. Ljubljana, 1992 (discuss, recog.)
  • download as a MATLAB mat-file, file size: 959 bytes. Use UFget(1528) or UFget('Pajek/Tina_DisCog') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Pajek/Tina_DisCog

    Pajek/Tina_DisCog graph

    Matrix properties
    number of rows11
    number of columns11
    nonzeros48
    structural full rank?yes
    structural rank11
    # of blocks from dmperm2
    # strongly connected comp.1
    entries not in dmperm blocks3
    explicit zero entries0
    nonzero pattern symmetry 50%
    numeric value symmetry 50%
    typebinary
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorV. Batagelj
    editorV. Batagelj
    date1992
    kinddirected graph
    2D/3D problem?no

    Additional fieldssize and type
    nodenamefull 11-by-10

    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/.                                
    ------------------------------------------------------------------------------
     STUDENT GOVERNMENT OF UNIVERSITY OF LJUBLJANA (Hlebec 1992)                  
     discussion, recognition                                                      
    

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))51 52 45
    Cholesky flop count2.8e+02 2.9e+02 2.3e+02
    nnz(L+U), no partial pivoting91 93 82
    nnz(V) for QR, upper bound nnz(L) for LU42 44 31
    nnz(R) for QR, upper bound nnz(U) for LU55 59 55

    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.