Matrix: AMD/G2_circuit

Description: circuit simulation problem, Ufuk Okuyucu, AMD, Inc.

AMD/G2_circuit graph
(undirected graph drawing)

AMD/G2_circuit

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  • Matrix group: AMD
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  • download as a MATLAB mat-file, file size: 1 MB. Use UFget(1412) or UFget('AMD/G2_circuit') in MATLAB.
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    Matrix properties
    number of rows150,102
    number of columns150,102
    nonzeros726,674
    structural full rank?yes
    structural rank150,102
    # of blocks from dmperm1
    # strongly connected comp.1
    explicit zero entries0
    nonzero pattern symmetrysymmetric
    numeric value symmetrysymmetric
    typereal
    structuresymmetric
    Cholesky candidate?yes
    positive definite?yes

    authorU. Okuyucu
    editorT. Davis
    date2006
    kindcircuit simulation problem
    2D/3D problem?no

    Ordering statistics:result
    nnz(chol(P*(A+A'+s*I)*P')) with AMD10,058,740
    Cholesky flop count5.0e+09
    nnz(L+U), no partial pivoting, with AMD19,967,378
    nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD19,602,585
    nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD35,961,188

    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.