Matrix: Schenk_ISEI/para-9

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

Schenk_ISEI/para-9 graph
(undirected graph drawing)

Schenk_ISEI/para-9 dmperm of Schenk_ISEI/para-9

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  • download as a MATLAB mat-file, file size: 21 MB. Use UFget(978) or UFget('Schenk_ISEI/para-9') in MATLAB.
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    Matrix properties
    number of rows155,924
    number of columns155,924
    nonzeros2,094,873
    structural full rank?yes
    structural rank155,924
    # of blocks from dmperm565
    # strongly connected comp.565
    explicit zero entries3,321,485
    nonzero pattern symmetrysymmetric
    numeric value symmetry 18%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

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

    Additional fieldssize and type
    bfull 155924-by-1

    Notes:

    next: Schenk_ISEI/para-10 first: Schenk_ISEI/para-5

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD235,874,915
    Cholesky flop count1.2e+12
    nnz(L+U), no partial pivoting, with AMD471,593,906
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD632,097,831
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD969,885,444

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3321485 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.