• UF Sparse Matrix Collection
  • Matrix group: Schenk_IBMSDS
  • Click here for a description of the Schenk_IBMSDS group.
  • Click here for a list of all matrices
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  • Matrix: Schenk_IBMSDS/matrix-new_3
  • Description: Olaf Schenk, Univ. Basel: IBM TJ Watson, Yorktown, semiconductor device
  • download as a MATLAB mat-file, file size: 9 MB. Use UFget(960) or UFget('Schenk_IBMSDS/matrix-new_3') in MATLAB.
  • download in Matrix Market format
  • download in Rutherford/Boeing format

    Schenk_IBMSDS/matrix-new_3

    dmperm of Schenk_IBMSDS/matrix-new_3

    Schenk_IBMSDS/matrix-new_3 graph

    Matrix properties
    number of rows125,329
    number of columns125,329
    nonzeros893,984
    structural full rank?yes
    structural rank125,329
    # of blocks from dmperm46,658
    # strongly connected comp.46,658
    entries not in dmperm blocks16,851
    explicit zero entries1,784,766
    nonzero pattern symmetry 99%
    numeric value symmetry 28%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

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

    Additional fieldssize and type
    bfull 125329-by-1

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))31,826,571 22,986,517 20,766,640
    Cholesky flop count3.8e+10 2.3e+10 1.8e+10
    nnz(L+U), no partial pivoting63,527,813 45,847,705 41,424,802
    nnz(V) for QR, upper bound nnz(L) for LU66,933,851 38,125,272 36,708,939
    nnz(R) for QR, upper bound nnz(U) for LU123,710,393 71,932,404 68,415,435

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1784766 explicit zero entries.

    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.