Matrix: Schenk_IBMSDS/matrix_9

Description: Olaf Schenk, Univ. Basel: IBM TJ Watson, Yorktown, semiconductor device

Schenk_IBMSDS/matrix_9 graph Schenk_IBMSDS/matrix_9 graph
(bipartite graph drawing) (graph drawing of A+A')

Schenk_IBMSDS/matrix_9 dmperm of Schenk_IBMSDS/matrix_9

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  • Matrix group: Schenk_IBMSDS
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  • download as a MATLAB mat-file, file size: 11 MB. Use UFget(959) or UFget('Schenk_IBMSDS/matrix_9') in MATLAB.
  • download in Matrix Market format, file size: 13 MB.
  • download in Rutherford/Boeing format, file size: 9 MB.

    Matrix properties
    number of rows103,430
    number of columns103,430
    nonzeros1,205,518
    structural full rank?yes
    structural rank103,430
    # of blocks from dmperm4,059
    # strongly connected comp.4,059
    explicit zero entries916,032
    nonzero pattern symmetry 100%
    numeric value symmetry 17%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorIBM
    editorO. Schenk
    date2003
    kindsemiconductor device problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 103430-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD116,910,584
    Cholesky flop count4.1e+11
    nnz(L+U), no partial pivoting, with AMD233,717,738
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD234,691,273
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD434,672,550

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 916032 explicit zero entries.

    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.