IBM_EDA/trans5 graph

Matrix: IBM_EDA/trans5

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

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  • Matrix group: IBM_EDA
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  • download as a MATLAB mat-file, file size: 4 MB. Use UFget(1324) or UFget('IBM_EDA/trans5') in MATLAB.
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    IBM_EDA/trans5

    dmperm of IBM_EDA/trans5

    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
    entries not in dmperm blocks77,899
    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
    kindsubsequent circuit simulation problem
    2D/3D problem?no

    Additional fieldssize and type
    bfull 116835-by-1

    Notes:

    next: - first: IBM_EDA/trans4

    Ordering statistics:AMD METIS DMPERM+
    nnz(chol(P*(A+A'+s*I)*P'))657,008 820,383 583,329
    Cholesky flop count2.0e+07 9.0e+07 2.1e+07
    nnz(L+U), no partial pivoting1,197,181 1,523,931 1,127,722
    nnz(V) for QR, upper bound nnz(L) for LU354,840,547 - 350,648,754
    nnz(R) for QR, upper bound nnz(U) for LU6.519822e+09 - 6.517917e+09

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

    Maintained by Tim Davis, last updated 30-Sep-2008.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.