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.
  • download in Matrix Market format, file size: 2 MB.
  • download in Rutherford/Boeing format, file size: 1 MB.

    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

    Maintained by Tim Davis, last updated 01-Apr-2011.
    Matrix pictures by cspy, a MATLAB function in the CSparse package.
    Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.