Matrix: Schenk_ISEI/ohne2

Description: Olaf Schenk, Univ. Basel: Integrated Systems Eng., San Jose, semiconductor device

Schenk_ISEI/ohne2 graph
(undirected graph drawing)


Schenk_ISEI/ohne2

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  • Matrix group: Schenk_ISEI
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  • download as a MATLAB mat-file, file size: 60 MB. Use UFget(971) or UFget('Schenk_ISEI/ohne2') in MATLAB.
  • download in Matrix Market format, file size: 70 MB.
  • download in Rutherford/Boeing format, file size: 57 MB.

    Matrix properties
    number of rows181,343
    number of columns181,343
    nonzeros6,869,939
    structural full rank?yes
    structural rank181,343
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries4,193,606
    nonzero pattern symmetrysymmetric
    numeric value symmetry 9%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorIntegrated Sys. Eng.
    editorO. Schenk
    date2003
    kindsemiconductor device problem
    2D/3D problem?yes

    Additional fieldssize and type
    bfull 181343-by-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD216,005,751
    Cholesky flop count6.3e+11
    nnz(L+U), no partial pivoting, with AMD431,830,159
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD330,457,100
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD605,350,165

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 4193606 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.