AMD/G2_circuit graph

Matrix: AMD/G2_circuit

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

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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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    AMD/G2_circuit

    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
    entries not in dmperm blocks0
    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:AMD METIS
    nnz(chol(P*(A+A'+s*I)*P'))10,058,740 6,715,674
    Cholesky flop count5.0e+09 1.7e+09
    nnz(L+U), no partial pivoting19,967,378 13,281,246
    nnz(V) for QR, upper bound nnz(L) for LU19,602,585 13,624,985
    nnz(R) for QR, upper bound nnz(U) for LU35,961,188 25,353,872

    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.