Matrix: Schenk_ISEI/barrier2-1

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

Schenk_ISEI/barrier2-1 graph
(undirected graph drawing)


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  • Matrix group: Schenk_ISEI
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  • download as a MATLAB mat-file, file size: 20 MB. Use UFget(964) or UFget('Schenk_ISEI/barrier2-1') in MATLAB.
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  • download in Rutherford/Boeing format, file size: 20 MB.

    Matrix properties
    number of rows113,076
    number of columns113,076
    structural full rank?yes
    structural rank113,076
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries1,675,572
    nonzero pattern symmetrysymmetric
    numeric value symmetry 20%
    Cholesky candidate?no
    positive definite?no

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

    Additional fieldssize and type
    bfull 113076-by-1


    next: Schenk_ISEI/barrier2-2 first: Schenk_ISEI/barrier2-1

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD131,339,665
    Cholesky flop count4.6e+11
    nnz(L+U), no partial pivoting, with AMD262,566,254
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD763,064,356
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD1,134,738,682

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1675572 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.