Matrix: IBM_EDA/trans4

Description: IBM EDA circuit simulation matrix, Timothy Lehner (transient)

IBM_EDA/trans4 graph IBM_EDA/trans4 graph
(bipartite graph drawing) (graph drawing of A+A')

IBM_EDA/trans4 dmperm of IBM_EDA/trans4

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  • download as a MATLAB mat-file, file size: 4 MB. Use UFget(1323) or UFget('IBM_EDA/trans4') in MATLAB.
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    Matrix properties
    number of rows116,835
    number of columns116,835
    nonzeros749,800
    structural full rank?yes
    structural rank116,835
    # of blocks from dmperm19
    # strongly connected comp.19
    explicit zero entries16,596
    nonzero pattern symmetry 85%
    numeric value symmetry 30%
    typereal
    structureunsymmetric
    Cholesky candidate?no
    positive definite?no

    authorT. Lehner
    editorT. Davis
    date2005
    kindcircuit simulation problem sequence
    2D/3D problem?no

    Additional fieldssize and type
    bfull 116835-by-1

    Notes:

    next: IBM_EDA/trans5 first: IBM_EDA/trans4

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD657,008
    Cholesky flop count2.0e+07
    nnz(L+U), no partial pivoting, with AMD1,197,181
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD575,014,818
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD6,649,376,145

    Note that all matrix statistics (except nonzero pattern symmetry) exclude the 16596 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.